Nearby tools from the catalog that fit the same job or workflow.
Flatten WebP transparency
Replace WebP transparency with a solid or gradient background and export a flat WebP locally.
Make a color transparent
Pick a color in one image, remove it with tolerance and edge smoothing, and export a transparent PNG locally.
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.
Check alpha and transparency
Check whether an image has transparency, review alpha stats, and preview the alpha mask locally.
Remove logo backgrounds
Remove logo and signature backgrounds locally for transparent PNG export, especially on flatter graphics and simpler edges.
Remove edge halos
Reduce halo edges and old sticker-style borders around the alpha shape in one PNG export.
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A quick way to understand who this helps, what it solves, and where it connects next.
People preparing transparent PNGs for channels, uploads, docs, and storefronts where a baked background is easier to control
Turning a transparent PNG into a ready-to-share flat PNG without changing file format or opening a larger editor
Capture flatten-PNG and replace-alpha-background intent with a browser-first compositing utility
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
To flatten a PNG, open your transparent image in the tool and choose a background. Flatten PNG Transparency composites your image over white, black, a custom solid color, or a two-stop linear gradient, then exports a new PNG with the transparency replaced by that visible background.
All compositing happens locally in your browser. The source file stays on your device while the flat export is generated, so there is no upload step and no server processing. This keeps private artwork and screenshots on your machine.
The export remains a PNG rather than switching to JPG. The only change is that the previously transparent areas now show the background you picked, which makes the file behave predictably wherever it lands.
Flattening makes sense when the destination is known and you no longer need transparency. Documents, marketplace listings, and export pipelines often handle alpha inconsistently, showing unwanted checkerboards or black fills. Baking in a solid background avoids those surprises.
It is also useful for logos or graphics that must sit on a specific color, or for email and print where transparency is unreliable. Because Flatten PNG Transparency keeps the PNG format, you get the predictable background without converting to a lossy format.
Short answers for the questions people usually have before trying a utility like this.
Yes. Flatten PNG Transparency is free to use and runs entirely in your browser with no account needed.
No. The output stays a PNG. The only change is that transparency is replaced with the visible background you choose before export.
Yes. The tool supports a simple two-stop linear gradient with a few direction presets, in addition to white, black, and custom solid colors.
Yes. The source file stays in your browser the whole time, and the flattened PNG is generated on your device without any upload.
Yes. Because it runs in the browser, you can flatten a PNG on a phone or tablet just as easily as on a desktop.
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 transparency with a chosen backdrop and export a flat PNG for channels that do not need alpha.