Alpha preserved
Transparent regions stay transparent in output formats that support them.
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.
Watch the workflow
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
PNG efficiency
Reduce delivery weight while keeping transparency visible
The optimizer measures the source against browser-friendly alternatives so you can decide whether lossless PNG or a modern alpha format fits better.
Before → after
Measured bytes
Visual comparison
Inspect the result rather than trusting a compression percentage alone.
Purpose-led choice
Keep PNG for exact assets; consider WebP or AVIF when delivery size matters more.
Know before you process: Already-optimized flat graphics may have little lossless headroom; modern formats can save more with a compatibility trade-off.
Ready to try it?
Free, private, no signup. Typical savings: 30–70%.
Optimize a PNG →