Nearby tools from the catalog that fit the same job or workflow.
Flatten PNG transparency
Replace transparency with a solid or gradient background and export a flat PNG for ready-made sharing.
Check alpha and transparency
Check whether an image has transparency, review alpha stats, and preview the alpha mask locally.
Make a color transparent
Pick a color in one image, remove it with tolerance and edge smoothing, and export a transparent PNG locally.
Build animated WebP
Build one animated WebP from PNG, JPG, or WebP frames with frame order, delay, loop, and canvas controls.
Swap to a solid background
Cut out one subject locally, replace the background with white, black, or a custom color, and export PNG or JPG.
Remove headshot backgrounds
Remove portrait and headshot backgrounds locally, then export a transparent PNG or quick white-background version for profile-photo handoff.
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A quick way to understand who this helps, what it solves, and where it connects next.
People preparing WebP assets for channels where transparency is unnecessary or where a ready-made matte background is safer
Replacing WebP alpha with a chosen backdrop while keeping the result in WebP instead of switching formats
Capture flatten-WebP-transparency and remove-alpha intent with a dedicated browser-first export utility
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
To flatten a WebP, open your file in the tool and pick a background style. Flatten WebP Transparency composites the image over white, black, a custom solid color, or a gradient, then exports a new WebP with the alpha channel replaced by that background.
Animated WebP files are supported too. The tool flattens each frame onto the chosen background and exports the result back as an animated WebP, so motion is preserved while transparency is removed.
All processing happens locally in your browser. The source file stays on your device and is never uploaded to a server, which keeps your images private while you prepare them for a fixed background.
Flattening WebP is the right step when you want the image safe for distribution on a known background rather than preserving transparency. Some viewers, editors, and platforms render WebP alpha inconsistently, so baking in a background guarantees how the image will appear.
Because Flatten WebP Transparency keeps the WebP format, you retain WebP's efficient compression while removing the uncertainty of an alpha channel. This is handy for thumbnails, listings, and embeds where a clean, predictable background matters.
Short answers for the questions people usually have before trying a utility like this.
Yes. Flatten WebP Transparency is free and runs entirely in your browser with no sign-up.
Yes. The tool keeps the output as WebP rather than switching formats, so you keep WebP compression with the transparency replaced.
Yes. Animated WebP files are flattened frame by frame and exported back as animated WebP with the chosen background.
No. Flattening and export happen locally in your browser, so the source WebP never leaves your device.
Yes. The tool runs in the browser, so you can flatten a WebP on a phone or tablet as well as a computer.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Replace WebP transparency with a chosen backdrop and export a ready-made WebP for channels that do not need alpha.