Compress PNG Images
Reduce PNG size losslessly — or convert to WebP for an even smaller file.
Your images stay on your device. Nothing is uploaded.
PNGs are larger than JPGs because they store data losslessly — perfect for screenshots, logos and graphics, but heavy when used for photographs. Image-Compressor.uk runs a palette-quantisation pass for graphics and offers a one-click switch to WebP for photographic PNGs.
All processing happens in the browser. Drop a PNG below, see the before/after savings, and download. The tool preserves transparency by default.
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Frequently asked questions
- How do I compress a PNG image?
- Drag and drop your PNG file (or click to select) and the compressor reduces its size automatically using the pre-tuned settings on this page. Adjust the quality slider, max dimension, or output format for a stronger or gentler compression. Everything runs in your browser — your file never leaves your device.
- Does compressing a PNG reduce quality?
- For graphics and screenshots, compression is effectively lossless — only the file structure changes. For photographic PNGs, switching to WebP or JPEG output dramatically reduces size with no visible quality difference. You can preview before downloading and tune the quality slider until the size and quality balance feels right.
- Is the PNG compressor free?
- Yes. Image Compressor is free, requires no signup, and has no upload limits. For batches, use the bulk compressor.
- Are my PNG files uploaded to a server?
- No. Compression happens entirely in your browser using the Canvas API. Files never touch our servers — that is what makes the tool both private and fast.
- What is the largest PNG I can compress?
- Single uploads are capped at 25 MB to keep the tool responsive in the browser. Very large files may be slower because compression uses your device's memory and CPU rather than a server.
Ready to compress your PNG files?
Drop them in. Compression is free, instant, and never leaves your device.
Start compressing