Image Saturation & Contrast
Tune saturation, contrast and brightness of an image.
🎚Image Saturation & Contrast
All processing happens locallyWhat this tool does
Image Saturation & Contrast is a per-pixel image tuner running in the browser, implements the standard table both ways and locates invalid bytes instead of silently dropping them.
Saturation interpolates each pixel towards or away from its luminance rather than multiplying, so bright areas do not clip. Contrast and brightness can push channels past 0–255; values are clamped automatically, so extreme settings lose highlight or shadow detail.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
Channels clamp to 0–255, so very high brightness blows highlights to white and very high contrast crushes shadows — an inherent limit of bitmap editing.
There is one resample and one pixel pass, so it is lossy. Start from the original and finish in one edit instead of round-tripping saves.
Output width defaults to 480 px for responsiveness and can be raised; very large images (6000 px) get noticeably slow.
The bytes are invalid in the chosen encoding — usually the wrong codec.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.