Online Tool Store
Color Replacer
Click a color in your image, pick a replacement, and swap it with a hard edge or a soft blend. Export as PNG or JPEG — all in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Or drag and drop an image here.
Click the image below to pick the color you want to replace.
How it works
- Choose an image — click to browse, or drag and drop it onto the upload area — then click on it to pick the color you want to replace.
- Choose the replacement color and a tolerance. Turn on "Soften edges" for a gradual blend instead of a hard cutoff.
- Click "Replace color". Not quite right? Click "Reset to original" and try again — nothing is uploaded, so there's no cost to experimenting.
- Pick PNG (keeps transparency) or JPEG (smaller, no transparency) and download the result.
The method
Every pixel's color is compared to the target color using RGB distance; pixels within the chosen tolerance are recolored:
distance² = (r₁−r₂)² + (g₁−g₂)² + (b₁−b₂)²
With "Soften edges" on, that cutoff stops being a cliff: pixels in the outer 20% of the tolerance radius blend linearly toward the replacement color instead of switching all at once, so a gradient or an anti-aliased edge doesn't come out looking cut with scissors.
FAQ
What is a color replacement tool?
A tool that finds every pixel close to a color you pick and swaps it for a different color, in one pass across the whole image — rather than selecting or painting each area by hand.
What does tolerance control?
How close a pixel's color needs to be to the "replace this color" swatch to get swapped. Low tolerance only replaces near-exact matches; higher tolerance catches a wider range of similar shades.
Can I pick the source color directly from the image?
Yes — click anywhere on the image and that pixel's color fills the "replace this color" swatch.
What does "Soften edges" do?
Without it, a pixel is either fully replaced or left untouched, which can leave a hard, jagged line wherever the tolerance cutoff falls across a gradient or an anti-aliased edge. With it on, pixels near that cutoff blend gradually between the original and replacement color instead of switching all at once — useful on photos and soft-edged graphics, less necessary on flat, solid-color artwork.
Can I export as JPEG instead of PNG?
Yes. PNG is the default because it preserves transparency; switch to JPEG for a smaller file when you don't need transparency. JPEG has no transparency channel, so any transparent area is filled white before export rather than left to a browser's default (which is often an unwanted black fill).
Can I undo a replacement?
Yes — "Reset to original" restores the image you uploaded, so you can retry with different colors or tolerance without re-uploading. There's no multi-step undo history beyond that single reset.
Is my image uploaded anywhere?
No — replacement happens locally on a canvas in your browser.
How we compare
| Feature | Online Tool Store | imgonline.com.ua | LunaPic |
|---|---|---|---|
| Live preview — no upload-and-wait | ✓ | ✗ | ✓ |
| Hard swap or a soft blended edge, in one step | ✓ | Single intensity slider only | Separate tool for a softer effect |
| Choose PNG or JPEG, with a quality slider for JPEG | ✓ | ✓ | Not shown on this page |
| Your image never leaves your device | ✓ | ✗ | Not confirmed |
| No account required | ✓ | ✓ | ✓ |
For a whole-image color swap, this covers it end to end without a round trip to a server. If the job is recoloring one region of a photo — a shirt, say — rather than every matching pixel across the whole image, a brush-based tool like Pixlr's Color Replace paints selectively instead of matching by color everywhere; that's a different job from a global swap, and a heavier one.