Processed entirely in your browser
The color fill happens locally on your device — your image is never uploaded, so there's nothing for anyone else to see.
Add background color to image transparency in PNG or WebP files directly in your browser. Pick any solid color; files stay private and never upload.
Choose or drop an image
PNG, WEBP· up to 20.0 MB per file
Processed only in your browser — never uploaded
Free single-file processing in your browser; no cloud conversion quota is used.

Add background color to image transparency in PNG or WebP files directly in your browser. Pick any solid color; files stay private and never upload.
The color fill happens locally on your device — your image is never uploaded, so there's nothing for anyone else to see.
Transparent areas are filled the moment you pick a color, with a live preview and no server round trip.
Fill as many images as you need at no cost — there's no per-file charge for a local operation like this.
Open the tool and start filling colors right away — no account or email required.
Choose a PNG or WebP with transparent areas — it loads directly in your browser and is never uploaded.
Choose a color with the picker or enter an exact #rrggbb hex value, such as your brand color.
Only the transparent pixels are filled; opaque areas of your image stay untouched, and you see the result immediately.
Save the filled image in its original format — PNG stays PNG, WebP stays WebP — with nothing ever stored on a server.
Choose settings that match the result you need.
↔ Swipe sideways to view every column.
| Need | Recommended setting | Best for |
|---|---|---|
| Background color (#rrggbb) | Pick a color with the picker or paste an exact hex code — #ffffff for white, #000000 for black, or your brand color. The color fills fully transparent pixels and blends under semi-transparent edges; opaque areas are never touched. | Pick a color with the picker or paste an exact hex code — #ffffff for white, #000000 for black, or your brand color. The color fills fully transparent pixels and blends under semi-transparent edges; opaque areas are never touched. |
Review what the tool accepts, how it processes the file, and what it produces.
↔ Swipe sideways to view every column.
| Feature | PNG | WebP |
|---|---|---|
| Format | PNG | WebP |
| Processing | Runs in your browser | Runs in your browser |
| Result | Add background color to image transparency in PNG or WebP files directly in your browser. Pick any solid color; files stay private and never upload. | Add background color to image transparency in PNG or WebP files directly in your browser. Pick any solid color; files stay private and never upload. |
The output is ready for common workflows supported by its format.
PNG is a lossless raster image format created in the mid-1990s as a patent-free replacement for GIF. It is the standard choice for screenshots, logos, UI graphics, and any image that needs transparency.
PNG preserves every pixel exactly and supports a full 8-bit alpha channel, so text and sharp edges stay crisp. The downside is size: photographs saved as PNG are far larger than the same image as JPG or WebP. Support is universal in browsers and editors, making it a safe default for graphics — just avoid it for large photo collections.
WebP is a modern image format developed by Google that supports both lossy and lossless compression, along with transparency and animation. At comparable visual quality it usually produces noticeably smaller files than JPG or PNG.
Every current browser supports WebP, which makes it an excellent default for web delivery. Outside the browser the picture is mixed: older desktop software, some email clients, and legacy systems may fail to open it. If a recipient cannot view a WebP file, convert it to JPG for photos or to PNG when transparency must be preserved.
Processing happens in your browser, so the selected file is not uploaded.
101,700 votes
Add background color to image transparency in PNG or WebP files directly in your browser. Pick any solid color; files stay private and never upload.
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