Markdown preview
Markdown preview renders as you type. Good for README drafts and comments. It isn't a full GFM implementation of every vendor extension, and it won't save to GitHub for you.
← All tools
Text
Markdown preview, text diff, case conversion, passwords, a random picker, notepad, and word count—all in the tab. The draft you paste isn't sent anywhere.
Runs in your browser · Nothing uploaded
- Markdown previewType Markdown on the left, see the rendered page on the right.Runs in your browser · Nothing uploaded
- Text diffTwo panes, word-level inserts and deletes, no upload.Runs in your browser · Nothing uploaded
- Case converterUpper, lower, title, camel, snake, and kebab case.Runs in your browser · Nothing uploaded
- Word counterWords, characters, sentences, and a reading-time estimate as you type.Runs in your browser · Nothing uploaded
- Password generatorRandom passwords via crypto.getRandomValues. You pick length and character sets.Runs in your browser · Nothing uploaded
- Password strengthRough entropy and common-pattern warnings in the tab. Nothing's sent.Runs in your browser · Nothing uploaded
- Random name / team pickerPick a winner or split a list into teams with crypto-grade randomness.Runs in your browser · Nothing uploaded
- Distraction-free notepadA plain notepad that autosaves in this browser. Nothing is uploaded.Runs in your browser · Nothing uploaded
- Lorem ipsum generatorGenerate placeholder Latin by word, sentence, or paragraph count — plain text or HTML.Runs in your browser · Nothing uploaded
- Text steganographyHide a short message in ordinary text with zero-width characters. Optional passphrase XOR.Runs in your browser · Nothing uploaded
- URL extractorPull http(s) links out of pasted text.Runs in your browser · Nothing uploaded
- Email extractorFind email addresses in pasted text.Runs in your browser · Nothing uploaded
- Phone number extractorFind phone-like numbers in pasted text.Runs in your browser · Nothing uploaded
- Duplicate line removerKeep the first occurrence of each line.Runs in your browser · Nothing uploaded
- Line sorterSort lines A–Z, reverse, or numeric.Runs in your browser · Nothing uploaded
- Slug generatorTurn a title into a URL-safe slug.Runs in your browser · Nothing uploaded
- Markdown table generatorBuild a GitHub-flavored markdown table from columns and rows.Runs in your browser · Nothing uploaded
- Zero-width character cleanerStrip invisible Unicode (ZWSP, BOM, bidi marks) from text.Runs in your browser · Nothing uploaded
- PII redactorPattern-based redaction of emails, phones, SSNs, cards, IPs. Not a guarantee.Runs in your browser · Nothing uploaded
- Text encryptorEncrypt or decrypt text with a passphrase (PBKDF2 + AES-GCM). Not steganography.Runs in your browser · Nothing uploaded
- Text to binary / hexConvert text code points to binary or hex and back — not a number-base converter.Runs in your browser · Nothing uploaded
- Morse code translatorText ↔ Morse with synthesized audio playback in the browser.Runs in your browser · Nothing uploaded
- Roman numeral converterConvert between Arabic numbers and Roman numerals (1–3999).Runs in your browser · Nothing uploaded
- Word cloud generatorBuild a word cloud from pasted text or a frequency list — PNG export.Runs in your browser · Nothing uploaded
- Fake data generatorSynthetic QA records as JSON, CSV, or SQL INSERT — not real-person data.Runs in your browser · Nothing uploaded
- Wordle solverNarrow down five-letter answers from your guesses and feedback.Runs in your browser · Nothing uploaded
- Anagram solverFind words that can be made from a set of letters.Runs in your browser · Nothing uploaded
- Word unscramblerUnscramble letters into valid words, longest first.Runs in your browser · Nothing uploaded
- Word frequency counterCount how often each word appears in a block of text.Runs in your browser · Nothing uploaded
- TOTP code generatorGenerate time-based one-time codes from a secret, locally.Runs in your browser · Nothing uploaded
- Text repeaterRepeat a piece of text any number of times with a separator.Runs in your browser · Nothing uploaded
- Rich text editorWrite formatted text and copy it as HTML or Markdown.Runs in your browser · Nothing uploaded
- Markdown to HTMLConvert Markdown to clean HTML and back.Runs in your browser · Nothing uploaded
About Text
These pages are for writing and everyday text chores, not for shipping JSON through a stranger's linter. Preview Markdown, diff two drafts, change case, count words, mint a password, pick a name from a list, or keep a notepad that never leaves this browser.
Markdown preview is a preview, not a CMS. Diff is word-level, two panes. Case converter is for identifiers and headlines, not a style-guide oracle.
Developer utilities that used to share this hub—JSON, regex, hashes, JWT, YAML/XML, minify, cron—now live under Developer, so this list stays about prose and personal utilities.
Tools in this category
Text diff
Text diff highlights inserts and deletes between two panes. Config files, copy changes, two versions of a paragraph. It isn't a git client and it doesn't speak unified diff files unless you paste that text as text.
Case converter
Case converter maps between upper, lower, title, camel, snake, and kebab. Identifiers and headlines. Title case won't be a Chicago Manual. Camel case won't know that URL should stay URL.
Word counter
Word counter tallies words, characters, sentences, and a reading-time estimate. The estimate assumes ordinary prose, not code. Spaces and CJK will surprise you if you treat “character” as “English letter.”
Password generator
Password generator pulls crypto.getRandomValues and builds a string from the sets you tick. Copy it into a manager. It isn't a vault.
Password strength
Password strength guesses entropy and nags about common patterns in this tab. It won't phone a breach list with your string.
Random name / team picker
Random name / team picker draws a winner or builds teams with crypto.getRandomValues. Optional remove-after-pick for raffles without replacement.
Distraction-free notepad
Distraction-free notepad autosaves to localStorage on this browser, shows word count, and downloads .txt. Not synced anywhere.
Lorem ipsum generator
Lorem ipsum generator builds placeholder Latin by words, sentences, or paragraphs — plain text or HTML — from a bundled word list.
Text steganography
Text steganography hides a message in cover text with zero-width characters. Optional passphrase XOR; many apps strip the payload on paste.
URL extractor
URL extractor pulls the unique http(s) links out of pasted text. It does not check or crawl them.
Email extractor
Email extractor finds email-shaped addresses in pasted text. It checks the format only, never whether a mailbox exists.
Phone number extractor
Phone extractor finds phone-like number patterns in pasted text. It is heuristic, not a carrier lookup.
Duplicate line remover
Duplicate line remover drops repeated lines and keeps the first occurrence, with an optional case-insensitive mode. Whole lines only, no fuzzy matching.
Line sorter
Line sorter sorts newline-separated lines alphabetically, in reverse, or numerically. It sorts whole lines, not columns.
Slug generator
Slug generator turns a title into a lowercase, hyphenated URL slug with accents stripped. It does not check your CMS for clashes.
Markdown table generator
Markdown table generator builds a GitHub-style pipe table from headers and CSV-style rows. No merged cells.
Zero-width character cleaner
Zero-width cleaner strips invisible and bidirectional Unicode characters from text and counts what it removed. It will also destroy any invisible encoding you meant to keep.
PII redactor
PII redactor masks emails, phone numbers, SSNs, card numbers, and IP addresses by pattern. It is a first pass that needs a human read, not a compliance tool.
Text encryptor
Text encryptor encrypts or decrypts text with a passphrase using PBKDF2 and AES-GCM in the tab. There is no key recovery, so a forgotten passphrase means the text is gone.
Text to binary / hex
Text↔binary/hex encodes Unicode code points — not the developer number-base converter.
Morse code translator
Morse translator with Web Audio playback and a visual flash; standard ITU-ish table.
Roman numeral converter
Roman numerals 1–3999 with strict canonical validation (rejects IIII/VX).
Word cloud generator
Word cloud from pasted text or frequency lists; spiral layout and PNG export.
Fake data generator
Synthetic QA rows as JSON/CSV/SQL INSERT from bundled combinatorial lists — not real PII.
Wordle solver
Wordle solver filters a bundled list of 2,315 five-letter words by your guesses and the tile colours you click in. It has no link to any game and cannot see today's answer.
Anagram solver
Anagram solver finds dictionary words that use every one of your letters exactly once, with ? for a blank tile. It opens in the strict "use all letters" mode; the word unscrambler opens in the looser one.
Word unscrambler
Word unscrambler lists every word you can build from a jumble or Scrabble rack, longest first, with a minimum length. It shares the anagram solver's engine and list, but opens in "any length" mode.
Word frequency counter
Word frequency counts every word in a text, lowercased, and sorts by count, with a switch for common English words and a row limit. The CSV contains every word, not only the rows shown.
TOTP code generator
TOTP generator makes the six-digit codes an authenticator app makes from a base32 secret. Calculated locally; still treat the secret like a password.
Text repeater
Text repeater repeats a string a set number of times with a separator you pick. Output over 5 million characters is refused to keep the page responsive.
Rich text editor
Rich editor is a small formatted-text editor with eight toolbar actions that exports Markdown, HTML, or plain text. Nothing is saved, so copy what you need before you leave.
Markdown to HTML
Markdown to HTML turns Markdown into raw HTML source you can copy (nothing renders), or HTML back into Markdown. It is the source-out counterpart to Markdown preview, and HTML to Markdown is lossy.
Common questions
Does the notepad sync across devices?
No. It autosaves in this browser's localStorage only. Download a .txt if you need a copy elsewhere, and clear it on a shared computer when you leave.
Where did JSON formatter and regex go?
Under Developer. Same tools, clearer category: this hub is for drafts and everyday text; Developer is for formats, tokens, and code-shaped chores.
Is Markdown preview a security sandbox?
No. It sanitises with DOMPurify for the preview, but untrusted HTML still isn't something to open as if this tab were an isolation boundary.
Why these tools don't upload your files
There is no server to upload to. Each page is a static file, and the work happens in your browser. Your file is read from disk into memory, processed, and handed back as a download. Once the page has loaded you can disconnect from the network and it keeps working. The longer explanation