RaahUPSC · Image Tools
JPG to AVIF Converter
Re-encodes JPG photos as AVIF, the AV1-based format that frequently produces the smallest files for a given visual quality on the web.
✓ No upload · ✓ No sign-up · ✓ No watermark
How to use JPG to AVIF Converter
- Add .jpg or .jpeg files.
- Choose a Quality value; try 60 to 80 for web images and compare.
- Click Convert to AVIF and let the encoder finish each file.
- Download individually or via Download all (ZIP).
Using AVIF for website images
AVIF derives from the AV1 video codec and tends to outperform both JPG and WebP on size, particularly at moderate quality settings where it avoids blocky artefacts. That makes it attractive for image-heavy sites, portfolios and blogs aiming at better page speed. The tool decodes your JPG, then either uses the browser's native AVIF export or falls back to a bundled WebAssembly encoder.
Since the source is already lossy, aim for the lowest quality that still looks right rather than maximum settings, which can produce files bigger than the original JPG. Encoding is noticeably slower than JPG or WebP. If you publish AVIF, keep JPG fallbacks for the minority of visitors on old browsers.
Limitations
- Encoding is CPU-intensive and can be slow on phones or for large photos.
- Very high quality settings may not save space over the original JPG.
- Old browsers and some image software cannot open AVIF.
Frequently asked questions
Why is my AVIF bigger than the JPG?
At very high quality, AVIF may spend more bytes than an already compressed JPG. Lower the slider and compare.
Which browsers show AVIF?
Recent Chrome, Edge, Firefox and Safari versions display it. Very old versions do not.
Why does it say the encoder may take a moment?
If your browser cannot export AVIF itself, a WebAssembly encoder is loaded first.
Are my JPGs uploaded?
No. Decoding and AVIF encoding both run locally in the page.