Free Tool
Compare Image Formats
Upload an image to see the file size for PNG, WebP (85% and 70%), AVIF, and JPG side-by-side. Download any format directly — all processing is local.
Drag to compare
Upload once — compare PNG, WebP 85%, WebP 70%, AVIF, and JPG file sizes side by side
Drop an image here
or click to browse — JPG, PNG, WebP, AVIF, HEIC
How to read this
Sizes are shown for a scaled-down version of your image (max 2000px) for fast encoding. Download size may differ for very large originals. The α symbol indicates formats that support transparency. AVIF encoding uses WASM — it initialises on first use and may take a moment.
For more detail, read: PNG vs WebP vs AVIF — Which Format for Transparency?
How it works
- Drop a PNG, JPG, WebP, or AVIF source image
- The tool re-encodes it as PNG, WebP, and AVIF and measures each output size
- View the visual quality and file size for each format side by side — pick the best fit for your use case
Frequently asked questions
Which format should I use for photos?
WebP or AVIF give the best balance of quality and file size for photos. AVIF typically produces 20–30% smaller files than WebP at the same quality. PNG is lossless but produces the largest files.
Which format should I use for transparent images?
PNG is the most compatible. WebP supports transparency and is smaller. AVIF supports transparency with the best compression. Avoid JPEG — it does not support transparency.
Does the comparison include the same quality setting for all formats?
Yes. The tool uses a consistent quality target across all three formats so you get an apples-to-apples comparison.
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Why it's different
PNG vs WebP vs AVIF vs JPG comparison entirely in your browser — upload once, see all four formats side-by-side. No server, no upload, completely private.
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. Upload once, see all sizes.
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