Image Format Converter
Convert between JPG, PNG, WebP, AVIF
90%
Free image format converter — JPG, PNG, WebP, AVIF
Toololis Image Converter changes image format in your browser using the Canvas API. Batch convert multiple files. Adjust quality for lossy formats. Outputs download directly — no signup, no watermarks.
Format comparison (2026)
- JPG — Universal support. 1990s format, still the default for web photos. No transparency.
- PNG — Lossless, supports transparency. Large file sizes for photos.
- WebP — Google\'s 2010 format. 30% smaller than JPG at same quality. Supports transparency + animation. Universal browser support.
- AVIF — Modern (2019). 50% smaller than JPG at same quality. Chrome, Safari, Firefox all support it.
How to use this tool
- 1
Drop or pick an image
Any JPG, PNG, WebP, AVIF, BMP, or GIF works. Drop multiple files for batch conversion.
- 2
Choose target format
Pick JPG, PNG, WebP, or AVIF. Adjust quality for lossy formats (JPG, WebP, AVIF).
- 3
Download converted images
Every image gets its own download button. Source images stay on your device — nothing uploaded.
Common conversion needs
- PNG → JPG — Shrink screenshots before email/attachment
- JPG → WebP — Modernize website images for 30% faster loads
- GIF → MP4/WebP — GIF is huge; WebP animation is 10× smaller (MP4 is a video, not handled here)
- Anything → PNG — For designs, logos, anything needing transparency
- WebP → JPG — Send to apps that don\'t support WebP (older systems)
Frequently Asked Questions
What formats can I convert?
Input: JPG, PNG, WebP, GIF, BMP, AVIF (anything your browser can decode). Output: JPG, PNG, WebP, AVIF (if browser supports encoding it — Chrome/Edge/Firefox do).
Which format should I use?
AVIF for maximum compression (modern browsers only). WebP for broad modern support with ~30% savings vs JPG. JPG for maximum compatibility. PNG for lossless graphics with transparency.
Does JPG have transparency?
No — JPG does not support transparency. Converting a PNG with transparent areas to JPG fills the transparent parts with white. Use PNG or WebP if you need transparency.
Is quality lost when converting?
For lossy targets (JPG/WebP/AVIF): some quality loss at each conversion. For lossless (PNG): no pixel loss, but may lose some metadata. Best practice: keep originals, only convert for distribution.
Can I convert HEIC photos from iPhone?
Most browsers don't support HEIC decoding natively. If your browser can't read it, try a desktop app first (iOS Photos can export as JPG on share).
Is my image data uploaded?
No. Everything runs via Canvas API in your browser. Perfect for confidential photos, screenshots, or business documents.
You might also like
🔒
100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.