Free Tool
PNG Optimizer
Upload a PNG and see how much you can save by switching to WebP or AVIF — both of which preserve full transparency. Typical savings are 30–70% with no visible quality loss.
Drag to compare
Upload a PNG and see WebP and AVIF file size savings — transparency preserved across all formats
Drop a PNG here to see size savings
or click to browse — works with any image format
Why switch from PNG?
PNG is lossless and universal, but its file sizes are large for photos and product images. WebP offers comparable quality at 30–50% smaller file sizes. AVIF goes further — 50–70% savings — and is now supported in Chrome, Safari, and Firefox.
Both WebP and AVIF support full alpha channel transparency — your cut-out images stay transparent. Your images never leave your device — all encoding is local.
How it works
- Drop a PNG file — the tool analyses its colour depth and metadata
- Lossless compression removes redundant pixel data without changing any visible pixel
- Download the optimised PNG — identical visually, smaller on disk
Frequently asked questions
Is any quality lost during optimization?
No. PNG optimization is lossless — every pixel in the output is identical to the input. File size is reduced by removing metadata and compressing more efficiently.
How much smaller will my PNG get?
Typical savings are 10–40% depending on the image content. Images with large flat-colour areas (logos, icons) compress more than photos.
What is the difference between this and the Image Compressor?
PNG Optimizer uses lossless compression — no quality loss. The Image Compressor uses lossy compression (JPEG or WebP) to achieve larger savings but with some quality reduction.
Related tools
Why it's different
PNG to WebP/AVIF optimization with instant size comparison — no upload, no server. Transparency preserved across all formats.
100% Private
Everything runs on your device using in-browser AI. Nothing is transmitted to any server — not the file, not metadata, not filenames.
True Alpha Channel
We export straight (non-premultiplied) alpha so transparent PNGs open with a real checkerboard in Photoshop and Figma — no black halos.
Free Forever
No paywall, no watermark, no premium tier. The full-quality AI is free, supported by non-intrusive ads.
Works Offline
Once loaded, the app and AI models cache locally. Process files without an internet connection. Installable as a desktop or mobile app.
Ready to try it?
Free, private, no signup. Typical savings: 30–70%.
Optimize a PNG →