PNG
Compressor
Reduce PNG file size while maintaining perfect lossless transparency.All processing happens 100% locally in your browser.
PNG
PNGLossless PNG Compressor
Shrink PNG files by re-optimizing their internal encoding — same exact pixels and transparency, smaller file on disk.
Zero Pixel Loss
Re-encodes the DEFLATE stream without discarding any image data.
Alpha-Safe
Transparent backgrounds and edges are preserved exactly as they were.
100% Private
All processing happens locally in your browser. Your files never leave your device.
Instant Speed
No uploads or downloads to a server means lightning-fast processing even for large files.
PNG Compression: Shrinking Files Without Losing a Single Pixel
PNG is a lossless format, so "compressing" it doesn't mean throwing away detail — it means re-encoding the same exact pixels more efficiently. ConvertSnap's PNG compressor re-optimizes the DEFLATE stream and strips unnecessary metadata, typically cutting 20-50% off a PNG's size while keeping it bit-for-bit identical where it matters: the transparency and color data.
Why PNG Files Are Often Bloated
Screenshots, logos, and design-tool exports frequently carry unused color palettes, embedded thumbnails, or suboptimal filter choices that add dead weight. Our compressor rebuilds the file with a leaner encoding, which is why a "compressed" PNG can look pixel-identical to the source while loading noticeably faster.
Transparency Stays Exactly Where It Is
Unlike lossy formats, PNG compression here never touches your alpha channel — logos, icons, and graphics with transparent backgrounds keep their exact edges and opacity. If you need even smaller files and don't need transparency, converting to WebP or JPG afterward can shrink things further.
Privacy First: Your Images, Your Device
All re-encoding happens locally in your browser. Your PNG files are never sent to a server, so design assets and screenshots stay private.
Frequently Asked Questions
Does PNG compression reduce quality?
No. PNG compression here is lossless — it removes redundant metadata and re-encodes more efficiently, but every pixel stays identical.
Is ConvertSnap free to use?
Yes, ConvertSnap is 100% free with no hidden charges, no registration required, and no watermarks on your output files.
Are my files safe?
Absolutely. Unlike other online tools, we process your files directly on your computer using WebAssembly and Javascript. Your files are never uploaded to any server.
What is the file size limit?
Since we use your local hardware, the only limit is your browser memory and device performance. We can often handle files larger than most cloud-based competitors.
Instant Quick Converters
Instant Quick Crop
Smart Conversion Wizard
Tell us what you want to achieve, and we'll pick the right tool for you.