Batch compress PNGs with a real palette optimizer - entirely in your browser.
Transparency isn't discarded to save space - the alpha channel is quantized right alongside the color palette, so it stays intact at every optimizer level. Files carrying transparency get an Alpha tag so you can confirm it before compressing.
Most "PNG compressors" just re-save the file and barely change the size, since PNG is lossless. Drag the optimizer slider to quantize the palette, like pngquant, and watch the size drop for real.
Compression runs on your browser's own Canvas engine. Images are never sent to a server, so there's nothing to leak and no upload wait.
Drop in dozens of PNGs, apply the same optimizer setting to all of them, and download every result together in a single ZIP.
Drag the before/after slider on any compressed file to inspect the result on a checkerboard backdrop, and see the exact size difference before committing.
Compress as many PNGs as you like - no watermark, no account, no catch.
Drag and drop .png files, or click to browse from your device. Files with transparency are tagged automatically.
Leave the optimizer at 256 for a lossless PNG, drag it lower to shrink the file, or flip on target size for an exact KB budget instead.
Grab each PNG individually, or all at once as a ZIP - no sign-up required.
PNG is a lossless format - it stores every pixel exactly, which means a plain re-save barely shrinks the file. The real way to shrink a PNG meaningfully is palette quantization: reducing the number of distinct colors used, similar to what pngquant does. This tool's optimizer does exactly that, and quantizes the alpha channel alongside the color palette so transparency survives.
Tip: leave the optimizer at 256 for a byte-faithful lossless PNG. Flat graphics, logos, and icons usually tolerate 32–64 colors well; photos need to stay near 200–256 to avoid visible banding.
imgxcolor's PNG compressor shrinks .png files directly in your browser using real palette quantization - no software, no file uploads, no cost. Drop in one PNG or a whole batch, tune the optimizer or target an exact file size, and download the results in seconds.
It's built for anyone shipping logos, icons, screenshots, or UI graphics to the web, or just trying to free up storage without visibly hurting quality.
PNG is a lossless format, so simply opening and re-saving a PNG keeps every pixel exactly and barely changes the file size. To actually shrink a PNG, you need to reduce the number of distinct colors it stores - that's what the optimizer slider does, similar to pngquant.
Leave the slider at 256 colors for a fully lossless, pixel-exact PNG with the alpha channel untouched. Drag it lower and the tool quantizes the image to that many colors using a real palette encoder - which can shrink flat graphics and logos dramatically with little visible difference, while transparency is preserved at every level. Photos generally band and look blotchy below 200 colors, so the tool nudges you toward a sensible range based on what it detects in your image.
Use the optimizer slider when you want direct control over the color count. Flip on target file size instead when you just need every output to fit under a specific KB budget - the tool automatically searches for the highest color count that still fits.
Every compression runs locally with JavaScript and the Canvas API. Your images are never uploaded, stored, or transmitted, which makes this compressor safe for client assets, personal photos, or any file you'd rather not send to a third-party server. There are no accounts, no sign-ups, and no usage limits.
No. imgxcolor decodes and re-encodes every PNG locally using your browser's Canvas engine, so nothing is ever uploaded and the result appears instantly.
PNG is lossless, so a plain re-save keeps every pixel exactly and barely changes the file size. This tool includes a real palette optimizer that quantizes the colors, similar to pngquant, which can shrink flat graphics and logos dramatically while keeping transparency intact.
Leave it at 256 colors for a fully lossless, pixel-exact PNG. Drag it lower and the tool quantizes the image to that many colors using a real palette encoder, which can shrink graphics and logos dramatically with little to no visible difference, while transparency is preserved at every level.
No. The alpha channel is quantized alongside the color palette rather than discarded, so transparency is preserved at every optimizer level, including fully lossless.
Yes. Drop in as many PNG files as you like, apply the same optimizer or target-size setting to the whole batch, compress them together, and download every result at once as a ZIP.
No hard limit - only what your device's memory can comfortably handle. The tool is free, has no watermark, and doesn't require an account.