PNG Optimizer — Lossless Compression
Make your PNG files lighter without changing a single pixel. This lossless optimizer recompresses the internal data structures of a PNG so the output is byte-for-byte identical in appearance yet noticeably smaller on disk. Faster page loads, lower bandwidth costs, and zero quality trade-offs. Drop a file in and see the difference instantly.
Optimize your PNG
Drop your image here, or
Upload a PNG image to optimize.
Why use this tool?
Under the hood, imgic leverages the UPNG.js library to re-encode your PNG’s compressed chunks more efficiently. The process is entirely lossless: every pixel in the output matches the original exactly, so screenshots, UI assets, and artwork remain pristine. Your files never leave your device because all processing happens inside the browser using built-in Web APIs. The optimized PNG keeps its original filename, making it easy to swap into existing projects without renaming anything. It’s an ideal step before deploying images to production websites or sharing assets with a team.
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Frequently asked questions
Is the optimization truly lossless?
Yes. The output PNG contains pixel-identical image data. Only the internal compression is improved, so there is absolutely no visual difference between the original and the optimized file.
Is my file private and secure?
Completely. Your file is processed 100% inside your browser using the Web APIs built into your device. Nothing is uploaded to any server — imgic never sees, stores, or transmits your images. You can even use these tools offline once the page has loaded.
How much smaller will my PNG get?
Results vary depending on how the original was saved. PNGs exported by screenshot tools or graphic editors often contain suboptimal compression and can shrink by 10–50%. Already well-optimized files may see a smaller reduction.
Does the optimizer change my filename?
Yes. The download follows imgic’s standard filename format: original basename plus dimensions and domain suffix, like photo_1200x800_imgic.com.png.
Can I use this for transparent PNGs?
Absolutely. The alpha channel is preserved in full during recompression. Transparent backgrounds, semi-transparent overlays, and any other alpha data remain completely intact.