How do you compress a PNG?
Add your PNG, pick a compression strength, and download the smaller file — it's optimized instantly in your browser.
- Drop or select a PNG.
- Keep it lossless, or reduce the colour count for more savings.
- Click Compress, then Download.
How does PNG compression reduce file size?
PNG is a lossless format, so the biggest savings come from reducing the number of colours stored (palette quantization). This tool reduces a 16-million-colour PNG to a smaller palette that looks nearly identical but takes far less space — often 50–70% smaller. Choose lossless mode to re-pack the file without touching any colours for a smaller, pixel-identical result.
Should you use lossy or lossless compression?
Use lossy (fewer colours) for the smallest files on graphics, logos, icons, and screenshots — the difference is usually invisible. Use lossless when you need every original colour preserved exactly, such as detailed artwork. Either way the output stays a PNG and keeps its transparency.
Is this PNG compressor free and private?
Yes. It's completely free with no signup or size limits, and the PNG is optimized entirely on your device — nothing is uploaded.
Frequently asked questions
- Does compressing a PNG keep transparency?
- Yes. The output is a PNG with its alpha channel intact, so transparent areas stay transparent.
- How much smaller will my PNG be?
- It depends on the image, but lossy palette compression often reduces graphics and screenshots by 50–70% with no visible difference.
- Do you upload my PNG?
- No. Compression runs entirely in your browser — your file is never uploaded, stored, or seen by us.