PNG compressor
PNG is lossless by default, but you can still reduce file size by optimizing color depth, stripping metadata, and re-encoding more efficiently. This tool helps shrink PNGs — especially screenshots, logos, and flat graphics — without sending files to a server.
How to compress a PNG
1. Drop or select your PNG file.
2. Choose compression options if available (palette reduction, metadata strip).
3. Compare output size against the original.
4. Download the optimized PNG.
Typical use cases
Logo with transparency
A 500 KB logo exported from design software often compresses to under 100 KB when palette colors are reduced to what the artwork actually uses.
UI screenshot
Flat-color screenshots compress well. Removing unused alpha and metadata can cut size for app store assets.
Favicon source
Before generating favicons, compress the master PNG so each derived size starts from a lean file.
When to compress PNG
• When you need transparency and lossless edges (logos, icons, overlays).
• When PNGs from design tools are larger than necessary.
• When you want local optimization without cloud services.
When to choose another format
• For photographic content without transparency — JPG or WebP is usually smaller.
• When you need animated images — use GIF or animated WebP.
• When maximum compatibility with very old software is required and every byte of metadata matters.
Why PNG files get big
PNG uses DEFLATE compression on filtered scanlines. Photographic noise does not compress well, which is why a JPG photo re-exported as PNG can be ten times larger. Graphics with flat colors and sharp edges compress dramatically better.
Palette vs truecolor
Indexed PNG (256 colors or fewer) suits logos and icons. Truecolor PNG-24/32 is for smooth gradients and photos with alpha. Matching mode to content is the biggest win.
Workflow with other tools
After compression, convert to WebP for the web, or run through the favicon generator for multi-size icon packs. Keep one uncompressed master in version control if you edit often.
Frequently asked questions
Is PNG compression lossless?
PNG re-encoding here preserves visual fidelity. Aggressive palette reduction may reduce colors but should not blur edges like JPEG.
Why is my photo PNG so large?
Photos saved as PNG store every pixel literally. Convert to JPG or WebP for photographic content.
Does compression remove transparency?
No — alpha channels are preserved for standard logo and icon workflows.
Can I batch compress?
Depends on the tool UI; each file is processed locally in your browser.
Are files uploaded?
No. Everything stays on your device.
Should I use PNG or WebP?
WebP often wins on size for both photos and graphics. Use PNG when you need universal support in older tools or strict lossless editing.