Compress PNG Online — Lossless & Lossy
Shrink PNG files in your browser without losing transparency or quality. Perfect for screenshots, app icons, and graphics destined for the web.
Why this matters
PNG files are usually 3–5× larger than equivalent JPGs because PNG is a lossless format. That bloat hurts page-load times and slows down asset delivery. PNG compressors smart-quantize colors so visual fidelity stays intact while shaving 50–80% off the file size — and transparency is preserved.
Step by step
- 1Drop in your PNGClick or drag a PNG file onto the compressor.
- 2Pick a targetChoose how aggressive the compression should be. Defaults preserve perceived quality.
- 3CompareInspect the compressed PNG against the original. Transparency stays intact.
- 4DownloadSave the optimized PNG to your device.
- 5Drop anotherCompress more PNGs or batch process them.
Frequently asked questions
Does PNG compression preserve transparency?
Yes — alpha channels are kept intact during compression.
PNG vs JPG: which is smaller?
For photos, JPG is much smaller. For graphics with sharp edges, transparent backgrounds, or fewer than 256 colors, PNG is often comparable or smaller.
Is the PNG compression lossy or lossless?
Our default uses smart color quantization (slightly lossy) for the best size reduction. The output is visually identical for almost every image.
How small can a PNG get?
Screenshots and UI graphics typically shrink 60–80%. Photos saved as PNG can shrink 80–95% — though you should usually convert those to JPG instead.
Is my image uploaded?
No. All compression happens in your browser; the PNG never leaves your device.
Should I convert PNG to WebP for smaller files?
Often yes. WebP supports transparency and is typically 25–35% smaller than compressed PNG. Use the Image Format Converter to switch.
You might also need
- Compress JPG Images Online — Free & PrivateReduce the file size of JPG and JPEG photos right in your browser. Drop in any JPEG, pick your target size, and download the compressed image. Nothing is uploaded to a server.
- Convert PNG to JPG OnlineTurn any PNG into a smaller JPG for email, web pages, or storage. Conversion happens in your browser.
- Convert Image to WebP OnlineConvert JPG, PNG, GIF, or other images to WebP for 25–35% smaller files at the same quality.