A photo can be right in every way except its colour. It came out too dark, too flat, too blue under office lights, or too bright to read. Small changes to brightness, contrast, saturation and warmth fix most of that, and you do not need a photo editor to make them.
This page lets you adjust image colour in your browser, for one picture or a set of up to 100. Pick a Quick look or move the sliders, add a Filter for black and white, sepia or a negative, and see the real result on the stage before you save. It is free, and nothing is uploaded. Below, each slider is explained, with the looks and what they suit, and how to compare before and after.
How to adjust image colour in your browser
- Press Select images, or drop one or more pictures anywhere on the page. JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, ICO and iPhone HEIC photos all open.
- Pick one of the Quick looks for a fast start, or move Brightness, Contrast, Saturation and Warmth yourself.
- Choose a Filter if you want one: None, Black & white, Sepia or Invert.
- Press and hold Hold to compare, or hold Space, to see the original. Split view shows before and after side by side.
- Leave Save as on Original, or pick JPG, PNG or WebP, then press Apply colour. With several pictures the button counts them: Apply to 3 pictures.
- Save the result. Its name ends in _colour, so it sits next to the original instead of replacing it.
The stage shows your settings exactly as they will be saved, so what you see is what you get. Reset puts every slider back to its starting point and the Filter back to None. Until something has changed, the note under the button says so: Nothing has changed yet. Move a slider or pick a look.
What brightness, contrast, saturation and warmth do
| Slider | Range | What it changes |
|---|---|---|
| Brightness | -50 to +50, starts at 0 | Lifts or darkens every tone by the same step |
| Contrast | 50 % to 200 %, starts at 100 % | Pushes darks darker and lights lighter, or pulls them together |
| Saturation | Grey to 200 %, starts at 100 % | How strong the colours are; Grey removes them |
| Warmth | Cooler (-50) to Warmer (+50), starts at 0 | Adds red and takes away blue, or the reverse |
Each slider starts from a neutral point marked on its track, so you can always see how far you have moved it, and the number beside the label gives the exact value. Click a slider and use the arrow keys for small, even steps. To change photo brightness without making it look flat, raise Contrast a little at the same time.
Warmth is gentle on purpose. At its strongest it moves red and blue by about 13 levels out of 255. That is enough to warm up a photo taken on a grey day, or to take the orange cast out of indoor light by moving towards Cooler, without turning skin a strange colour.
The order matters when you combine them. Brightness, Contrast and Saturation are worked out together first, Warmth comes next, and the Filter is applied last, on top of everything else. To increase saturation for a dull landscape, a moderate step, such as 110 % to 130 %, usually looks more natural than a big jump.
Quick looks and filters for a fast change
A Quick look sets the sliders and the Filter in one click. Treat it as a starting point: move any slider afterwards and the look's chip lets go, because your values no longer match it.
| Quick look | Settings | Try it on |
|---|---|---|
| Original | Everything neutral | Undoing a look you tried |
| Brighter | Brightness +15, Contrast 105 %, Saturation 105 % | Photos taken in dull light |
| Punchy | Brightness +4, Contrast 125 %, Saturation 135 % | Landscapes and food that look flat |
| Muted | Contrast 92 %, Saturation 55 % | A calm, faded style for a set |
| Black & white | The Black & white filter | Portraits, buildings, documents |
| Sepia | The Sepia filter | A warm, old-print brown |
| Invert | The Invert filter | A negative, or a dark screenshot made light |
Black & white turns each pixel into a grey of the same lightness, counting green most and blue least, as the eye does. The sepia effect gives the warm brown of an old print. Invert turns every colour into its opposite. Because the Filter comes last, Brightness and Contrast still shape a black and white or sepia picture.
Two pages open with a filter already chosen: make an image black and white and invert image colours.
Compare, then colour a whole set of photos
Hold to compare shows the original for as long as you press it, by pointer or by holding Space. Split view puts a divider across the stage, with Before on the left and After on the right; drag it, or focus it and use the arrow keys. Zoom in with the + and − keys to judge skin tones or fine detail, and press 0 to fit the picture again. Zoom changes only your view.
Select up to 100 pictures to give them all the same colour. They line up in a strip under the stage, and clicking one previews the settings on it. This suits a set shot in the same light, such as product photos or a day's holiday pictures, where one look should match across them all.
- Every picture gets the same slider values and the same Filter.
- A file that cannot be opened says Can’t open on its card and is skipped.
- With more than one result, Save all as ZIP saves them together in one file.
Format, quality and privacy
Save as decides the format. Original keeps the picture's own format where the tool can write it: a JPG stays a JPG and a PNG stays a PNG, while an iPhone HEIC photo becomes a JPG and a GIF, BMP or TIFF becomes a PNG. JPG and WebP are saved again at high quality, and PNG keeps every pixel of the result exactly. A transparent PNG stays transparent as PNG or WebP; saved as JPG, the clear parts turn white.
The new file's name ends in _colour. If you used only a Filter and left the sliders alone, it ends in _bw, _sepia or _inverted instead, so you can tell the versions apart.
- The colour change runs in your browser. The picture is never uploaded, and our server does no picture work.
- It is free, with no account and no watermark. Image tools are not counted in the free daily limit, which applies to document conversions only.
- The saved picture is drawn fresh, so it carries no location, camera or date details, and its colours are saved as standard sRGB.
- It works in current Chrome, Edge and Firefox. Very large pictures may be too big for your browser.
When the colour is right, other pages can take the same picture further: pixelate image to hide a part, flip photo to mirror it, circle crop image for a round avatar, or make image square for a square post. To make the file smaller for the web, use Compress image.
Change the colour of your picture now
Pick a look or move the sliders, check the result with Hold to compare, and press Apply colour. That is all it takes to adjust image colour for one photo or a whole set.
It is free, private and runs in your browser. Select a picture above to start.
