Brightness, contrast, exposure, levels, curves, white balance, grayscale, invert, duotone, and color replace, all in the browser, none uploaded.
Runs in your browser · Nothing uploaded
These are the adjustments photographers mean by “colour,” not Instagram filters with names. Brightness and contrast are the blunt instruments. Exposure is a gain-style lift. Levels and curves shape the histogram. White balance warms or cools. Grayscale, invert, duotone, and color replace are the more opinionated moves.
Everything writes a new image from the pixels currently on screen. The original file on disk isn't touched until you overwrite it yourself. There's no layer stack and no non-destructive sidecar. If you need to compare, keep the original and use the before/after slider in Compare.
Auto enhance is a one-click levels-and-saturation lift for a flat phone snap. It isn't a substitute for looking at the histogram.
Brightness & contrast are the two sliders everyone reaches for. Brightness lifts or drops all values; contrast pushes them apart or together. Easy to overdo. If the photo is actually underexposed, try Exposure or Levels before you crank brightness until the blacks go grey.
Saturation & hue change how strong the colour is and where it sits on the wheel. A small saturation cut often beats a filter. Hue shifts are for a deliberate colour grade, not for “fixing” a white balance that White balance would handle more honestly.
Exposure applies a gain-like curve, closer to how a stop of light behaves than a brightness slider does. Useful for a dark phone shot. Highlights will clip if you keep going; that's physics, not a bug.
Levels sets black point, white point, and midtones. It is the right tool when a scan is foggy or a JPEG looks washed out. Pair it with the histogram page if you want to see what you're doing instead of guessing.
Curves on this site is a contrast fade for a softer, matte look, not a full Photoshop RGB curve editor. If you need channel-by-channel surgery, that's still a desktop job.
White balance warms or cools the image. It won't magically recover a shot lit by mixed fluorescent and sunset, but it will take the blue out of an indoor JPEG that the phone left too cold.
Grayscale discards chroma and leaves luminance. There's no film-stock picker. If you want a tinted black-and-white, use Duotone after, or instead.
Invert makes a negative. Handy for white-on-black diagrams, a scan of a film negative, or a screenshot that's unreadable in dark mode. Not a colour grade.
Duotone maps shadows to one colour and highlights to another. Posters, thumbnails, and “make this product shot look designed” are the use. It is a look, not a correction.
Color replace swaps one hue range for another. Recolouring a shirt or a logo is in bounds. Hair, skin, and already-compressed JPEGs with noisy chroma will look patchy, that's the source, not the slider lying to you.
Auto enhance runs a conservative levels and saturation lift. It is for the flat, slightly muddy phone photo. It won't fix a blown sky, and it will make a photo that was already graded look worse.
Brightness is a blunt add/subtract. Exposure behaves more like camera gain. Levels lets you park black and white points so foggy scans actually have a black. Start with levels if the histogram is bunched up; use exposure for a dark but otherwise fine photo; use brightness only when you really mean “everything lighter.”
No. They decode a copy in memory and you download a new file. The original stays on disk until you replace it yourself. There's no cloud original because there's no cloud.
Grayscale is a dedicated conversion to luminance. Dropping saturation to zero on the hue tool is similar but not identical in how channels mix. If you want a clean black-and-white, use Grayscale. If you want “almost colourless,” use a small saturation cut.
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
