Image colour picker
Sample any pixel as HEX, RGB, HSL, and alpha, then extract dominant colours and their shares for design, branding, and visual analysis.
Adjust image colours
Tune exposure, brightness, contrast, saturation, hue, temperature, gamma, sharpness, and blur while using a histogram and same-size comparison to judge the result.
Local processing: your source images stay on this device.
Files
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No images selected yet.
Settings
ID photo compositionOn-device detection only suggests a crop; you can still adjust it before export.
This image’s crop has not been confirmed.
ID photo backgroundOptional on-device portrait cut-out; the original never leaves your device.
Dimensions
Preset sizeCommon platform sizes
Select one or more sizes; each image is exported in every selected size.
Icon safe area
One composition generates favicon, PWA and common app sizes, plus a manifest.
Crop areaDrag the box to resize or reposition it
Rotation0°
Quality
Padding on each sidepx
Upscale imageReal-ESRGAN · 2×
Frame rangeLeave the last frame blank to use the rest.
Base64 increases data size. This tool limits input to protect browser memory.
How to use
Adjust image colours
What this tool is for
Tune exposure, brightness, contrast, saturation, hue, temperature, gamma, sharpness, and blur while using a histogram and same-size comparison to judge the result.
How to use it
Use the luminance histogram while tuning exposure, brightness, contrast, saturation, hue, temperature, and gamma, then add sharpening, blur, greyscale, or sepia when appropriate. Compare at the same display size to judge highlights, shadows, and skin tones.
Results and next steps
Each selected source produces one result card with preview, pixel dimensions, format, and size. Download one file, selected files, or the complete ZIP.
Privacy and local processing
Processing runs in your browser. Source images are not uploaded by this tool.
Before you start
Your browser must decode images into memory. Very large files, long animations, and large batches may require substantial memory. Check the preview and export details, and verify the latest official requirements before submitting identity, application, or print-ready images.
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Compare images
Inspect two images with slider, side-by-side, flicker, and single-image views, then calculate changed pixels, change percentage, and mean pixel error.
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