Compress PNG online
Drop your PNG files below to optimize them losslessly — same pixels, smaller file. If you need bigger savings, switch the output to WebP and keep the transparency.
Drop images here or click to browse
JPG, PNG, WebP, AVIF · processed on your device, never uploaded
Lossless vs. converting
PNG optimization rearranges how the file is stored without touching the image, typically saving 10–40% on screenshots and graphics. Converting the PNG to WebP or AVIF keeps the transparency and can cut 60–90% — the right choice for websites.
When to keep PNG
Keep PNG when the file must stay lossless or when the software receiving it only accepts PNG: print workflows, office documents, app stores and some upload forms.
Frequently asked questions
Does lossless optimization change how my image looks?
No. Every pixel stays identical — only the internal storage of the file is optimized.
Why is my PNG still big after optimizing?
Photographs stored as PNG are inherently huge. For photos, choose JPG or WebP as the output format — savings jump to 80–95%.
Is my photo uploaded anywhere?
No. Everything runs locally in your browser with WebAssembly — your image never leaves your device, which makes this safe even for ID photos and documents.