PNG Compressor
Reduce PNG file size in your browser. Transparency is preserved. For dramatic savings on photos, also try our PNG to JPG converter.
Drop or click to select PNG image
About this tool
PNG is a lossless format, which means every pixel is preserved exactly when the file is saved. That makes PNG ideal for logos, icons, screenshots, and any image with transparency or sharp edges — but it also makes PNG files much larger than JPEG for photographic content.
Our PNG Compressor reduces file size by re-encoding the image and, optionally, downscaling its dimensions. Because the work runs locally in your browser via the canvas API, the transparency (alpha) channel is preserved and your files never leave your computer.
If your PNG is a photo rather than a graphic, the single biggest win is usually switching to JPEG or WebP — those formats can produce a file 5–10× smaller at the same perceived quality.
Why use it
- Transparency (alpha channel) is preserved.
- Browser-based — no upload, no account, no watermark.
- Optional resize for very large screenshots and exports.
- Free with no daily file limit.
How to use it
- 1Upload your PNG
Drop a .png file (or several) into the upload area.
- 2Choose how aggressive to compress
Pick a quality level. For lossless-feeling results on graphics, keep it high; for screenshots you plan to embed at smaller sizes, you can resize at the same time.
- 3Save the result
Download the new PNG. The original file on your disk is untouched.
Common use cases
- Shrinking large UI screenshots for bug reports and tickets.
- Optimizing logos and icons for fast-loading websites.
- Reducing PNG exports from Figma, Photoshop, or Illustrator.
- Squeezing transparent graphics under attachment size limits.
- Preparing assets for mobile apps where every KB matters.
- Cleaning up oversized PNG diagrams in documentation.
Tips for best results
PNG is the wrong tool for photographs. A typical phone photo saved as PNG is 5–10× the size of the same image as JPEG with no visible quality difference.
Many tools export PNGs much wider than they need to be. Resize to the actual display dimensions for an instant size cut.
If your PNG has no transparent pixels, converting it to JPEG will produce a far smaller file.
Frequently asked questions
Does PNG compression keep transparency?
Yes — PNG is lossless and the alpha channel is preserved exactly.
Why is my PNG still big?
Photos compress poorly as PNG by design. For photographic content, switch to JPG or WebP for 5–10× smaller files.