We hate online tools that upload our files.So I built ones that don't.
Convert, compress, trim, format: in this tab. Your file doesn't go to my server for a “preview,” a “virus scan,” or any other excuse. It barely leaves the page.
No sign-up. No watermark. Turn the wifi off after load and it still works.
- Stays in the tab
- No sign-up
- No watermark
- Wifi optional
What got under my skin was the ritual. Drop a résumé, a passport scan, a kid's photo, a contract. Watch an upload bar. Hope some company you Googled five minutes ago deletes it later. You only ever get their word for it.
I stopped taking that word. These tools run in your browser. The file isn't “deleted after 24 hours.” It was never on my disk.
How it works
- 1
Drop the file
Drag it in or pick it from disk. It loads into this tab’s memory. That's not an upload to me.
- 2
Work happens here
Resize, compress, convert: your CPU, this page. Kill wifi mid-job if you want; it keeps going once the tool has loaded.
- 3
Save the result
Download straight from the browser. There was no middle machine holding a copy.
Pick what you're working with
Categories appear when I finish them. A missing tool means I haven't built it yet, not that it's sitting behind a paywall.
Convert
Change formats without leaving your device.
HEIC to JPGConvert HEIC to JPG in your browser. Nothing's uploaded.Runs in your browser · Nothing uploadedPNG to JPGConvert PNG to JPG in your browser. Nothing's uploaded.Runs in your browser · Nothing uploadedJPG to PNGConvert JPG to PNG in your browser. Nothing's uploaded.Runs in your browser · Nothing uploadedPNG to WebPConvert PNG to WebP in your browser. Nothing's uploaded.Runs in your browser · Nothing uploadedJPG to WebPConvert JPG to WebP in your browser. Nothing's uploaded.Runs in your browser · Nothing uploadedWebP to PNGConvert WebP to PNG in your browser. Nothing's uploaded.Runs in your browser · Nothing uploadedConvert to AVIFEncode PNG or JPEG as AVIF.Runs in your browser · Nothing uploadedImage to Base64Encode an image as a data URL or raw base64.Runs in your browser · Nothing uploadedBase64 to ImagePaste base64 or a data URL and download an image.Runs in your browser · Nothing uploadedImage to PDFWrap one or more images in a simple PDF.Runs in your browser · Nothing uploaded
Compress & Optimize
Shrink files while keeping quality under your control.
JPG compressorRe-encode JPEG at a chosen quality.Runs in your browser · Nothing uploadedPNG compressorRe-encode PNG for smaller files.Runs in your browser · Nothing uploadedWebP compressorCompress to WebP.Runs in your browser · Nothing uploadedAVIF compressorCompress to AVIF.Runs in your browser · Nothing uploadedCompress to target sizeBinary-search quality until you hit a file-size goal.Runs in your browser · Nothing uploadedAuto-optimizeEncode JPEG, WebP, and AVIF at the same quality and keep the smallest.Runs in your browser · Nothing uploaded
Resize & Transform
Resize, crop, rotate, and flip.
ResizeBy pixels, percentage, or social-media presets.Runs in your browser · Nothing uploadedCropCrop by exact pixel bounds, with ratio presets.Runs in your browser · Nothing uploadedRotateRotate to any angle.Runs in your browser · Nothing uploadedFlipFlip horizontal or vertical.Runs in your browser · Nothing uploadedBatch resizeResize many images to the same size.Runs in your browser · Nothing uploaded
Color & Adjustments
Brightness, curves, color tools.
Brightness & contrastBrightness and contrast sliders.Runs in your browser · Nothing uploadedSaturation & hueShift color intensity and hue.Runs in your browser · Nothing uploadedExposureExposure-style gain control.Runs in your browser · Nothing uploadedLevelsBlack point, white point, midtones.Runs in your browser · Nothing uploadedCurvesFade the contrast for a soft, matte look.Runs in your browser · Nothing uploadedWhite balanceWarm / cool color temperature.Runs in your browser · Nothing uploadedGrayscaleConvert to black and white.Runs in your browser · Nothing uploadedInvertNegative / invert colors.Runs in your browser · Nothing uploadedDuotoneMap shadows and highlights to two colors.Runs in your browser · Nothing uploadedColor replaceSwap one color range for another.Runs in your browser · Nothing uploadedAuto enhanceOne-click levels and saturation lift.Runs in your browser · Nothing uploaded
Filters & Effects
Blur, sharpen, and everyday effects.
Gaussian blurSoft blur by radius.Runs in your browser · Nothing uploadedSharpenSharpen edges by amount.Runs in your browser · Nothing uploadedPixelateMosaic / blocky pixels, useful for redaction too.Runs in your browser · Nothing uploadedFilm grainAdd noise / grain.Runs in your browser · Nothing uploadedVignetteDarken edges.Runs in your browser · Nothing uploaded
Compositing
Merge, watermark, sprites.
Merge imagesCombine images into one side-by-side strip.Runs in your browser · Nothing uploadedWatermarkText watermark with adjustable opacity.Runs in your browser · Nothing uploadedSprite sheet generatorPack frames into a sheet.Runs in your browser · Nothing uploadedSprite sheet slicerSlice a sheet into frames (zip).Runs in your browser · Nothing uploaded
Text & Annotation
Captions, memes, redaction, drawing.
Add textCaption with font, color, stroke, shadow.Runs in your browser · Nothing uploadedMeme generatorClassic top / bottom meme text.Runs in your browser · Nothing uploadedBorder / frameSolid border in any colour and width.Runs in your browser · Nothing uploadedShapes & arrowsOverlay a rectangle and an arrow.Runs in your browser · Nothing uploadedFreehand drawAnnotate with a brush.Runs in your browser · Nothing uploadedBlur / redact regionPixelate or blur a selected rectangle.Runs in your browser · Nothing uploadedAdd signatureDraw or place a signature.Runs in your browser · Nothing uploaded
Metadata & Analysis
EXIF, histograms, color tools.
Image info & EXIFDimensions, size, format, and embedded metadata.Runs in your browser · Nothing uploadedEXIF stripperOne-click remove metadata for privacy.Runs in your browser · Nothing uploadedHistogramRed, green and blue channel histograms.Runs in your browser · Nothing uploadedColor paletteDominant colors with hex codes.Runs in your browser · Nothing uploadedColor pickerEyedropper with hex / RGB / HSL.Runs in your browser · Nothing uploaded
Generate & Create
Create images from scratch.
GradientTwo-colour linear gradient export.Runs in your browser · Nothing uploadedPlaceholder imageLocal placehold.co-style image.Runs in your browser · Nothing uploadedQR codeGenerate a downloadable QR image.Runs in your browser · Nothing uploadedBarcode generatorCode 128, EAN-13, UPC-A, and Code 39 barcodes — PNG or SVG, offline.Runs in your browser · Nothing uploadedFavicon setOne image → ICO + PNG sizes.Runs in your browser · Nothing uploadedOG share image1200×630 social card from headline + background.Runs in your browser · Nothing uploadedDevice mockupDrop a screenshot into a generic phone, tablet, or laptop frame.Runs in your browser · Nothing uploadedImage steganographyHide or reveal a message in an image's least-significant bits. Always exports PNG.Runs in your browser · Nothing uploadedASCII art generatorRender text as FIGlet-style ASCII art in the browser.Runs in your browser · Nothing uploadedSignature makerDraw or type a signature and export a transparent PNG.Runs in your browser · Nothing uploadedPhoto collage makerArrange several photos on one canvas with a grid layout and export a PNG.Runs in your browser · Nothing uploadedImage captionerAdd one outlined caption line near the bottom of a photo and export a PNG.Runs in your browser · Nothing uploadedScreenshot beautifierPut a screenshot on a gradient background with padding, rounded corners, and a shadow.Runs in your browser · Nothing uploadedCode screenshotTurn a code snippet into a styled image you can share.Runs in your browser · Nothing uploadedChart builderPaste CSV or spreadsheet cells and download a bar, line, or pie chart as PNG.Runs in your browser · Nothing uploadedQR code scannerRead a QR code from an image file or your camera.Runs in your browser · Nothing uploadedBarcode scannerRead a barcode from an image file or your camera.Runs in your browser · Nothing uploadedAir-gap transferMove small files between devices as a sequence of QR codes, no network involved.Runs in your browser · Nothing uploaded
Batch Operations
Multi-file workflows, zip download.
Batch convertConvert many images to one format.Runs in your browser · Nothing uploadedBatch compressCompress many images to JPEG in one pass.Runs in your browser · Nothing uploadedBatch watermarkApply the same text watermark to many files.Runs in your browser · Nothing uploadedBatch renamePattern-based rename into a zip.Runs in your browser · Nothing uploadedBatch EXIF stripStrip metadata from many files.Runs in your browser · Nothing uploaded
Compare & Measure
Diff and print-size tools.
Camera & Scan
Webcam capture. Still zero upload.
Webcam & document scanCapture from your camera; optional contrast boost for scans.Runs in your browser · Nothing uploadedMicrophone testCheck that your microphone works and watch the input level live.Runs in your browser · Nothing uploadedWebcam testPreview your camera and check resolution and frame rate.Runs in your browser · Nothing uploaded
Text
Markdown, diffs, case, passwords, notepad, and word count—without uploading the draft.
Markdown previewType Markdown on the left, see the rendered page on the right.Runs in your browser · Nothing uploadedText diffTwo panes, word-level inserts and deletes, no upload.Runs in your browser · Nothing uploadedCase converterUpper, lower, title, camel, snake, and kebab case.Runs in your browser · Nothing uploadedWord counterWords, characters, sentences, and a reading-time estimate as you type.Runs in your browser · Nothing uploadedPassword generatorRandom passwords via crypto.getRandomValues. You pick length and character sets.Runs in your browser · Nothing uploadedPassword strengthRough entropy and common-pattern warnings in the tab. Nothing's sent.Runs in your browser · Nothing uploadedRandom name / team pickerPick a winner or split a list into teams with crypto-grade randomness.Runs in your browser · Nothing uploadedDistraction-free notepadA plain notepad that autosaves in this browser. Nothing is uploaded.Runs in your browser · Nothing uploadedLorem ipsum generatorGenerate placeholder Latin by word, sentence, or paragraph count — plain text or HTML.Runs in your browser · Nothing uploadedText steganographyHide a short message in ordinary text with zero-width characters. Optional passphrase XOR.Runs in your browser · Nothing uploadedURL extractorPull http(s) links out of pasted text.Runs in your browser · Nothing uploadedEmail extractorFind email addresses in pasted text.Runs in your browser · Nothing uploadedPhone number extractorFind phone-like numbers in pasted text.Runs in your browser · Nothing uploadedDuplicate line removerKeep the first occurrence of each line.Runs in your browser · Nothing uploadedLine sorterSort lines A–Z, reverse, or numeric.Runs in your browser · Nothing uploadedSlug generatorTurn a title into a URL-safe slug.Runs in your browser · Nothing uploadedMarkdown table generatorBuild a GitHub-flavored markdown table from columns and rows.Runs in your browser · Nothing uploadedZero-width character cleanerStrip invisible Unicode (ZWSP, BOM, bidi marks) from text.Runs in your browser · Nothing uploadedPII redactorPattern-based redaction of emails, phones, SSNs, cards, IPs. Not a guarantee.Runs in your browser · Nothing uploadedText encryptorEncrypt or decrypt text with a passphrase (PBKDF2 + AES-GCM). Not steganography.Runs in your browser · Nothing uploadedText to binary / hexConvert text code points to binary or hex and back — not a number-base converter.Runs in your browser · Nothing uploadedMorse code translatorText ↔ Morse with synthesized audio playback in the browser.Runs in your browser · Nothing uploadedRoman numeral converterConvert between Arabic numbers and Roman numerals (1–3999).Runs in your browser · Nothing uploadedWord cloud generatorBuild a word cloud from pasted text or a frequency list — PNG export.Runs in your browser · Nothing uploadedFake data generatorSynthetic QA records as JSON, CSV, or SQL INSERT — not real-person data.Runs in your browser · Nothing uploadedWordle solverNarrow down five-letter answers from your guesses and feedback.Runs in your browser · Nothing uploadedAnagram solverFind words that can be made from a set of letters.Runs in your browser · Nothing uploadedWord unscramblerUnscramble letters into valid words, longest first.Runs in your browser · Nothing uploadedWord frequency counterCount how often each word appears in a block of text.Runs in your browser · Nothing uploadedTOTP code generatorGenerate time-based one-time codes from a secret, locally.Runs in your browser · Nothing uploadedText repeaterRepeat a piece of text any number of times with a separator.Runs in your browser · Nothing uploadedRich text editorWrite formatted text and copy it as HTML or Markdown.Runs in your browser · Nothing uploadedMarkdown to HTMLConvert Markdown to clean HTML and back.Runs in your browser · Nothing uploaded
Documents
Resume, invoice, receipt, and cover letter builders — fill a form, preview, export PDF in this tab.
Resume / CV builderClassic or modern templates with ATS-friendly reading order and PDF export.Runs in your browser · Nothing uploadedInvoice generatorLine items, tax, discount, logo, and PDF — drafts stay in local storage.Runs in your browser · Nothing uploadedReceipt generatorNarrow paid-receipt layout with payment method and PDF export.Runs in your browser · Nothing uploadedCover letter generatorSkeleton templates you edit in place — no AI, PDF export offline.Runs in your browser · Nothing uploaded
Calculators
Units, dates, BMI, percentage math, and temperature converters that stay in the tab.
Unit converterLength, weight, volume, area, speed, and temperature (including C, F, and K).Runs in your browser · Nothing uploadedTimezone converterCurrent time in two zones and the offset between them.Runs in your browser · Nothing uploadedPercentage calculatorX% of Y, X is what % of Y, and percentage change.Runs in your browser · Nothing uploadedDate differenceYears, months, days, and total days between two dates.Runs in your browser · Nothing uploadedAge calculatorYears, months, and days from a birthdate to today.Runs in your browser · Nothing uploadedBMI calculatorHeight and weight to BMI and a WHO adult label. Not medical advice.Runs in your browser · Nothing uploadedTemperature converterCelsius, Fahrenheit, and Kelvin: nothing else on the page.Runs in your browser · Nothing uploadedAspect ratio calculatorFind a ratio from width and height, or scale to a new size.Runs in your browser · Nothing uploaded
Finance
Mortgage, loans, interest, retirement, tax, tips, salary, and net worth — all in this tab.
Tip calculatorBill, tip percent, split N ways.Runs in your browser · Nothing uploadedIndian govt salary calculator7th CPC Pay Matrix, DA, HRA, TA, NPS/GPF — editable rates, offline estimate. Not official pay.Runs in your browser · Nothing uploadedSales tax calculatorAdd tax to a price or reverse a tax-inclusive total.Runs in your browser · Nothing uploadedDiscount calculatorStack successive percent-offs and see the effective discount.Runs in your browser · Nothing uploadedRule of 72Years to double an investment at a given rate — approx vs exact.Runs in your browser · Nothing uploadedCompound interest calculatorFuture value with compounding schedule and a simple growth chart.Runs in your browser · Nothing uploadedSimple interest calculatorInterest = principal × rate × time. Cross-links to compound.Runs in your browser · Nothing uploadedMortgage calculatorMonthly payment and amortization schedule for a home loan.Runs in your browser · Nothing uploadedLoan calculatorPayment and amortization for personal, auto, or other loans.Runs in your browser · Nothing uploadedROI calculatorReturn on investment and annualized ROI over years.Runs in your browser · Nothing uploadedBreak-even calculatorUnits and revenue to cover fixed costs given contribution margin.Runs in your browser · Nothing uploadedRetirement calculatorFuture nest egg from savings and contributions; optional inflation.Runs in your browser · Nothing uploadedNet worth calculatorAssets minus liabilities with editable line items.Runs in your browser · Nothing uploadedExpense trackerLog expenses by category and total them. Data stays in this browser.Runs in your browser · Nothing uploaded
CSS
Gradients, shadows, radius, clamp, cubic-bezier, flex, grid, and Tailwind shades — copyable CSS.
CSS gradient generatorLinear, radial, or conic gradients with live preview.Runs in your browser · Nothing uploadedBox shadow generatorLayered box-shadow with inset support.Runs in your browser · Nothing uploadedBorder radius generatorPer-corner and elliptical border-radius.Runs in your browser · Nothing uploadedCSS clamp calculatorFluid type/spacing: clamp(min, preferred, max) from viewport range.Runs in your browser · Nothing uploadedCubic bezier generatorEasing curve with live motion preview.Runs in your browser · Nothing uploadedFlexbox playgroundTweak flex container and item props; copy the CSS.Runs in your browser · Nothing uploadedCSS grid generatorDefine columns, rows, and gap; preview and copy grid CSS.Runs in your browser · Nothing uploadedTailwind color generatorBuild a 50–950 shade scale from one hex color.Runs in your browser · Nothing uploadedColor palette generatorBuild a palette from one base color: complementary, analogous, triadic.Runs in your browser · Nothing uploadedClip-path generatorDrag points to shape a CSS clip-path and copy the code.Runs in your browser · Nothing uploadedGlassmorphism generatorTune blur, tint, and border for a frosted-glass CSS card.Runs in your browser · Nothing uploadedSVG blob generatorGenerate random organic blob shapes and export SVG.Runs in your browser · Nothing uploadedColor blindness simulatorPreview an image as seen with common types of color vision deficiency.Runs in your browser · Nothing uploaded
Merge, split, compress, convert, edit, and secure PDFs in this tab. Nothing's uploaded.
Merge PDFsCombine multiple PDFs into one, in the order you drop them.Runs in your browser · Nothing uploadedSplit PDFExtract a page range or one file per page (zipped).Runs in your browser · Nothing uploadedCompress PDFRe-encode pages smaller with Light / Medium / Heavy presets.Runs in your browser · Nothing uploadedOrganize pagesReorder, rotate, or delete pages from a thumbnail grid.Runs in your browser · Nothing uploadedRotate PDFRotate every page 90°, 180°, or 270°.Runs in your browser · Nothing uploadedCrop & resize pagesCrop margins or set pages to A4 / Letter / custom size.Runs in your browser · Nothing uploadedPDF to JPG / PNGRender each page to an image; multi-page downloads as a zip.Runs in your browser · Nothing uploadedImages to PDFOne image per page, or stack them on a single page.Runs in your browser · Nothing uploadedWord to PDFConvert .docx text to PDF. Complex layouts will not be perfect.Runs in your browser · Nothing uploadedPDF to WordBest-effort .docx from the PDF text layer. Tables and columns may not round-trip.Runs in your browser · Nothing uploadedExcel to PDFRender the first sheet as a table in a PDF.Runs in your browser · Nothing uploadedPDF to ExcelHeuristic table detection from positioned text. Works best on real tables.Runs in your browser · Nothing uploadedCSV to PDFParse a CSV and print it as a table PDF.Runs in your browser · Nothing uploadedMarkdown to PDFRender Markdown to a simple text PDF.Runs in your browser · Nothing uploadedPowerPoint to PDFExtract slide text from .pptx into a widescreen PDF. Images and animations are skipped.Runs in your browser · Nothing uploadedPDF to PowerPointBest-effort .pptx with one slide per page from the PDF text layer.Runs in your browser · Nothing uploadedPDF to EPUBBuild a reflowable EPUB from the PDF text layer — one chapter per page.Runs in your browser · Nothing uploadedAdd watermarkOverlay text or an image on every page.Runs in your browser · Nothing uploadedAdd page numbersStamp page numbers with position and start index.Runs in your browser · Nothing uploadedHeaders & footersAdd header and/or footer text on every page.Runs in your browser · Nothing uploadedExtract textCopy the PDF's text layer. Scanned pages need OCR instead.Runs in your browser · Nothing uploadedEdit PDF textClick any paragraph and type in place. Auto-OCR for scans. Whiteout + redraw on download.Runs in your browser · Nothing uploadedEncrypt PDFPassword-protect a PDF locally. Strength is what the library implements.Runs in your browser · Nothing uploadedRemove passwordUnlock a PDF when you know the password. Stays on this device.Runs in your browser · Nothing uploadedRedact PDFPaint black over regions and rebuild image-only pages so text does not survive underneath.Runs in your browser · Nothing uploadedFlatten PDFBake form fields into page content and remove interactivity.Runs in your browser · Nothing uploadedPDF metadataShow and strip author, title, dates, and producer fields.Runs in your browser · Nothing uploadedOCR searchable PDFRun Tesseract on each page and rebuild with an invisible text layer (best-effort).Runs in your browser · Nothing uploadedSign PDFPlace a drawn or uploaded signature image on a page.Runs in your browser · Nothing uploadedRepair PDFBest-effort rebuild of salvageable pages from a damaged file.Runs in your browser · Nothing uploadedCompare PDFsSide-by-side page previews of two PDFs with synced page index.Runs in your browser · Nothing uploadedPDF to audioExtract the text layer and read it with local speechSynthesis.Runs in your browser · Nothing uploaded
Archives
Zip, unzip, and inspect archives on your device.
Zip filesDrop any files, download one zip. Nothing's uploaded.Runs in your browser · Nothing uploadedUnzipList a zip's contents and download one file or all of them.Runs in your browser · Nothing uploadedZip inspectorSee names and sizes inside a zip without extracting the files.Runs in your browser · Nothing uploaded
Video
Convert, trim, compress, and cut video in this tab. Nothing's uploaded.
Convert videoMP4, WebM, MOV, MKV, AVI, FLV, and more — re-encoded in your browser.Runs in your browser · Nothing uploadedTrim videoCut a clip to a start and end time, on this device.Runs in your browser · Nothing uploadedCompress videoShrink a clip with CRF quality or a target size estimate.Runs in your browser · Nothing uploadedVideo to GIFTurn a clip into a palette-optimized GIF in the browser.Runs in your browser · Nothing uploadedExtract audioPull the soundtrack out as MP3, WAV, or AAC.Runs in your browser · Nothing uploadedMute videoStrip the audio track and keep the picture.Runs in your browser · Nothing uploadedResize videoScale a clip to a width, keeping aspect or forcing a size.Runs in your browser · Nothing uploadedRotate videoRotate a phone clip 90, 180, or 270 degrees.Runs in your browser · Nothing uploadedMerge clipsConcatenate two or more clips into one file.Runs in your browser · Nothing uploadedExtract framesPull stills from a clip into a zip, in the browser.Runs in your browser · Nothing uploadedReverse videoPlay a clip backwards. Caps long files at 20 seconds.Runs in your browser · Nothing uploadedChange video speedSpeed up or slow down a clip with setpts and atempo.Runs in your browser · Nothing uploadedCrop videoCut a rectangle out of the frame. Numeric crop, like the image tool.Runs in your browser · Nothing uploadedSplit videoCut a clip into N equal parts and download a zip.Runs in your browser · Nothing uploadedWatermark videoOverlay a logo image on a clip. Drop the clip first, then the logo.Runs in your browser · Nothing uploadedReplace audioSwap the soundtrack. Drop the clip first, then the new audio.Runs in your browser · Nothing uploadedVideo contact sheetA grid of frames as one PNG.Runs in your browser · Nothing uploadedBoomerangForward then reverse, concatenated. Caps at 8 seconds.Runs in your browser · Nothing uploaded
Audio
Convert, trim, merge, and normalize audio without uploading it.
Convert audioMP3, WAV, M4A, OGG, FLAC, AIFF, MKA, and more — encoded on this device.Runs in your browser · Nothing uploadedTrim audioCut an audio file to a start and end time.Runs in your browser · Nothing uploadedMerge audioConcatenate audio files into one MP3.Runs in your browser · Nothing uploadedCompress audioRe-encode at a lower bitrate for a smaller file.Runs in your browser · Nothing uploadedNormalize volumeEven out loudness with FFmpeg loudnorm, in the browser.Runs in your browser · Nothing uploadedAudio from videoSame extract as the video tool: soundtrack off a clip, no upload.Runs in your browser · Nothing uploadedSplit audioCut a recording into N equal parts.Runs in your browser · Nothing uploadedChange audio speedSpeed up or slow down without uploading the file.Runs in your browser · Nothing uploadedFade in/outApply afade at the start and end.Runs in your browser · Nothing uploadedRemove silenceStrip quiet stretches with silenceremove.Runs in your browser · Nothing uploadedStereo to monoDownmix to one channel.Runs in your browser · Nothing uploadedText to speechRead pasted text aloud with the voices installed on this device.Runs in your browser · Nothing uploaded
Students
Study timers, citations, GPA, typing practice, and flashcards in the tab.
Typing speed testTimed WPM and accuracy on random words or sentences.Runs in your browser · Nothing uploadedCitation generatorAPA, MLA, Chicago, and Harvard citations, with optional DOI/ISBN lookup.Runs in your browser · Nothing uploadedGPA calculatorWeighted GPA from course credits and grades, with configurable scales.Runs in your browser · Nothing uploadedReading time estimatorEstimate reading minutes from word count at a WPM you choose.Runs in your browser · Nothing uploadedPomodoro timerFocus and break cycles with a chime and optional desktop notification.Runs in your browser · Nothing uploadedFlashcard makerMake decks, flip cards, and review what you missed. Saved in this browser.Runs in your browser · Nothing uploadedPeriodic tableClassroom-style periodic table with group, period, mass, phase, and electron config.Runs in your browser · Nothing uploadedGroup makerSplit a list of names into random groups of a size you choose.Runs in your browser · Nothing uploadedBingo card generatorMake printable bingo cards from your own words.Runs in your browser · Nothing uploaded
Developer
JSON, regex, hashes, JWT, SQL, gitignore, SVG tidy, and a CORS-bound API client—in the tab.
.gitignore generatorCombine official GitHub gitignore templates and download a .gitignore.Runs in your browser · Nothing uploadedEmail validatorFormat and typo checks for one address or a pasted list. Not deliverability.Runs in your browser · Nothing uploadedSQL formatterPretty-print SQL in several dialects, entirely in the browser.Runs in your browser · Nothing uploadedSVG optimizerStrip fluff from an SVG and download a smaller file. Nothing is uploaded.Runs in your browser · Nothing uploadedREST / API clientBuild a request, fetch it from this tab, inspect the response. Subject to CORS.Runs in your browser · Nothing uploadedJSON formatterPretty-print, minify, and validate JSON, with the parse error's line and column.Runs in your browser · Nothing uploadedJSON ↔ CSVConvert a JSON array of objects to CSV and back, in the browser.Runs in your browser · Nothing uploadedRegex testerLive match highlights and capture groups for a pattern you type.Runs in your browser · Nothing uploadedURL encode / decodePercent-encode or decode a URL component, including Unicode.Runs in your browser · Nothing uploadedBase64 textEncode or decode plain text as Base64 (not the image tool).Runs in your browser · Nothing uploadedHash generatorSHA-256, SHA-1, and optional WordPress (phpass) hashes of pasted text — all in this tab.Runs in your browser · Nothing uploadedNumber base converterConvert between binary, octal, decimal, hex, ASCII bytes, and arbitrary bases 2–36 with BigInt.Runs in your browser · Nothing uploadedUnix timestamp converterTimestamp ↔ human date with auto seconds/ms detection, timezones, batch mode, and relative time.Runs in your browser · Nothing uploadedUUID generatorGenerate one or many version-4 UUIDs with crypto.randomUUID.Runs in your browser · Nothing uploadedJWT decoderSplit a JWT and pretty-print the header and payload. Does not verify signatures.Runs in your browser · Nothing uploadedFile hashSHA-256 and SHA-1 of a file you drop here, via Web Crypto. Nothing is uploaded.Runs in your browser · Nothing uploadedYAML ↔ JSONConvert YAML to JSON and back in the tab with js-yaml.Runs in your browser · Nothing uploadedXML ↔ JSONConvert XML to JSON and back with DOMParser. Namespaces can be lossy.Runs in your browser · Nothing uploadedMinify / beautifyMinify or pretty-print HTML, CSS, or JavaScript without a network round-trip.Runs in your browser · Nothing uploadedCron parserTurn a 5- or 6-field cron expression into plain English.Runs in your browser · Nothing uploadedColor converterHEX, RGB, HSL, and CMYK with a live swatch.Runs in your browser · Nothing uploadedContrast checkerWCAG contrast ratio for two colors, with AA and AAA pass/fail.Runs in your browser · Nothing uploadedChmod calculatorToggle rwx bits ↔ octal ↔ symbolic permissions.Runs in your browser · Nothing uploadedSubnet / CIDR calculatorIPv4 network, mask, broadcast, and usable hosts from CIDR.Runs in your browser · Nothing uploadedrobots.txt generatorBuild a robots.txt with allow/disallow and optional sitemap.Runs in your browser · Nothing uploadedsitemap.xml generatorTurn a list of URLs into a sitemap.xml.Runs in your browser · Nothing uploadedPWA manifest generatorGenerate a web app manifest.json skeleton.Runs in your browser · Nothing uploadedllms.txt generatorDraft an llms.txt listing key pages for AI crawlers.Runs in your browser · Nothing uploadedJSON to TypeScriptInfer TypeScript interfaces from a JSON sample.Runs in your browser · Nothing uploadedcurl to fetchConvert a common curl command to fetch() JavaScript.Runs in your browser · Nothing uploadedKeyboard testerPress keys to see which ones register, with key and code values.Runs in your browser · Nothing uploadedGamepad testerSee button presses and stick values from a connected controller.Runs in your browser · Nothing uploadedHTTP status codesSearchable list of HTTP status codes with plain-English meanings.Runs in your browser · Nothing uploadedKeep screen awakeStop your screen from sleeping while this tab is open.Runs in your browser · Nothing uploadedMeta tags generatorFill in a form and copy the title, Open Graph, and Twitter meta tags.Runs in your browser · Nothing uploadedMermaid diagram viewerWrite Mermaid text and see the diagram, then export SVG.Runs in your browser · Nothing uploaded
Utilities
Comparisons and extras that don't belong under one format.
AI (on this device)
Background removal, upscale, OCR, and colorize: ONNX and Tesseract from this origin, never a model CDN.
Remove backgroundCut the subject out with a small U²-Net in this tab.Runs in your browser · Nothing uploadedUpscale image2× or 4× in the browser. CPU wait, not an upload.Runs in your browser · Nothing uploadedImage to textEnglish OCR with Tesseract, worker and traineddata on this origin.Runs in your browser · Nothing uploadedColorize photoGuess colour on a grayscale still, locally.Runs in your browser · Nothing uploaded
AI Developer
Token counting, prompts, and LLM config helpers that run offline.
Token counterEstimate how many tokens a prompt uses for common LLM tokenizers.Runs in your browser · Nothing uploadedContext window checkerSee how much of a model's context window your text fills.Runs in your browser · Nothing uploadedLLM cost calculatorEstimate API cost from input and output tokens and per-million pricing.Runs in your browser · Nothing uploadedInstruction diffCompare two prompt or instruction versions line by line.Runs in your browser · Nothing uploadedSystem prompt builderAssemble a system prompt from role, rules, and output format sections.Runs in your browser · Nothing uploadedPrompt formatterClean up whitespace and wrap prompt sections in XML or Markdown.Runs in your browser · Nothing uploadedCLAUDE.md generatorDraft a CLAUDE.md project file for coding agents from a short form.Runs in your browser · Nothing uploadedAI rules generatorWrite rules files for Cursor, Copilot, and other assistants from one set of rules.Runs in your browser · Nothing uploadedMCP config builderBuild an MCP servers JSON config for a client without hand-editing.Runs in your browser · Nothing uploadedJSON schema builderDefine fields in a list and get a JSON Schema for structured model output.Runs in your browser · Nothing uploadedSkill builderCreate a SKILL.md with front matter and instructions for an agent skill.Runs in your browser · Nothing uploadedPrompt librarySave and organize prompts in this browser. Nothing leaves the device.Runs in your browser · Nothing uploaded
Health & Fitness
TDEE, body fat, ideal weight, water intake, and due dates—formulas in the tab, not a diagnosis.
TDEE & calorie calculatorDaily calorie estimate via Mifflin-St Jeor. Maintenance and rough ±500 kcal cuts.Runs in your browser · Nothing uploadedBody fat % calculatorUS Navy circumference estimate from tape measurements. Not a DEXA scan.Runs in your browser · Nothing uploadedIdeal weight calculatorShows a range across Devine, Robinson, Miller, and Hamwi—not one false precision.Runs in your browser · Nothing uploadedWater intake calculatorRough daily litres from weight, plus exercise add-on. A guideline, not a medical target.Runs in your browser · Nothing uploadedPregnancy due date calculatorNaegele's rule from last menstrual period (+280 days). An estimate—confirm with your doctor.Runs in your browser · Nothing uploaded
Math & STEM
Statistics, fractions, ratios, quadratics, geometry, and a scientific calculator—all offline.
Mean, median, mode & std devPaste numbers for mean, median, mode, variance, and sample or population std deviation.Runs in your browser · Nothing uploadedScientific calculatorArithmetic, trig, log, exponents, and roots. Buttons and keyboard. Pure Math.Runs in your browser · Nothing uploadedFraction calculatorAdd, subtract, multiply, or divide fractions; simplify with GCD; show the decimal.Runs in your browser · Nothing uploadedRatio calculatorSimplify a:b, or solve a:b = c:x for the missing value.Runs in your browser · Nothing uploadedQuadratic equation solverax² + bx + c = 0 with discriminant and complex roots when needed.Runs in your browser · Nothing uploadedGeometry calculatorArea, perimeter, or volume for circle, triangle, rectangle, sphere, cylinder, cone, cube.Runs in your browser · Nothing uploadedOhm's law calculatorSolve for V, I, R, or P given any two.Runs in your browser · Nothing uploadedResistor color code4- or 5-band resistor value and tolerance from colors.Runs in your browser · Nothing uploaded
Home & Kitchen
Cooking conversions, recipe scaling, pan sizes, paint, and tile math that stays in the browser.
Cooking measurement converterIngredient-aware cups↔grams, plus pure volume and weight conversions for baking.Runs in your browser · Nothing uploadedRecipe scalerPaste ingredients with quantities, set servings, get scaled amounts including fractions.Runs in your browser · Nothing uploadedBaking pan size converterFind equivalent pans by volume (round, square, loaf, and common sizes).Runs in your browser · Nothing uploadedPaint calculatorWall area minus doors/windows → gallons at your coverage rate and coats.Runs in your browser · Nothing uploadedFlooring / tile calculatorRoom area ÷ tile size, plus waste buffer and optional boxes from coverage-per-box.Runs in your browser · Nothing uploaded
Random & Games
Dice, coin flips, a Magic 8-Ball, and tournament brackets—crypto-grade randomness, no upload.
Dice rollerRoll d4 through d20 or a custom die, one or many, with crypto.getRandomValues.Runs in your browser · Nothing uploadedCoin flipperSingle flip or a batch simulation with heads/tails distribution.Runs in your browser · Nothing uploadedMagic 8-BallAsk a question, get a classic 8-ball answer at random.Runs in your browser · Nothing uploadedTournament bracket generatorSingle-elimination bracket with standard seeding, click-to-advance, local save, and PNG export.Runs in your browser · Nothing uploaded
Date & Time
Workdays between dates, shareable countdowns, and a multi-city world clock—all Intl, offline.
Workdays between datesCount business days; optionally paste your own holiday dates to exclude.Runs in your browser · Nothing uploadedCountdown to a dateLive days/hours/minutes/seconds to an event. Shareable via the URL query string.Runs in your browser · Nothing uploadedWorld clockSeveral cities at once via Intl.DateTimeFormat timeZone—no external API.Runs in your browser · Nothing uploaded
Social & Creator
Caption line breaks, multi-platform character counts, and YouTube chapter timestamps.