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EVOA Toolbox

JPG to AVIF Converter

Convert JPG photos to AVIF in your browser when it supports AVIF encoding. Adjust quality, compare before and after, and keep files private.

Processed locally in your browser. Your files are not uploaded.

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What this tool does

AVIF is a newer image format based on the AV1 video codec. For many photos it reaches the same visual quality as JPEG or WebP at a notably smaller size, and it handles smooth gradients with fewer visible blocks. This tool converts JPEG files to AVIF and reports the real size change.

There is an important caveat: encoding AVIF in the browser depends on your browser. Some browsers can display AVIF but cannot create it from a canvas. This tool checks this at runtime. If your browser cannot encode AVIF, the tool says so and does not run, instead of quietly saving a PNG or JPEG with an .avif name. You may then try another browser, or use JPG to WebP.

AVIF encoding is slower than JPEG or WebP, particularly for large photos, so batches can take a while. The work is done locally and, where possible, in a background worker so the page stays responsive. As with any lossy-to-lossy conversion, keep your originals.

How to use it

  1. 1Add one or more JPG or JPEG files.
  2. 2If you see a "not supported" message, your browser cannot encode AVIF; use another browser or the JPG to WebP tool.
  3. 3Set the quality. AVIF quality numbers are not equal to JPEG's; values around 50 to 65 are often a sensible start.
  4. 4Press Convert to AVIF and wait; large images take longer.
  5. 5Compare with the slider and download the files or a ZIP.

Supported formats

Input: JPG and JPEG. Output: AVIF (lossy). Only available in browsers that can encode AVIF from a canvas.

Privacy

This tool runs in your browser. The data you provide is processed on your device and is not sent to our servers.

Limitations

  • AVIF encoding is not available in every browser. When it is missing, the tool is disabled and tells you why.
  • The result may not be smaller than the JPEG, and it is a second lossy generation.
  • Encoding is slow for large images and uses a lot of memory. Images over about 100 megapixels are refused.
  • Compatibility: many apps, email clients, social sites and older operating systems cannot open AVIF yet. Check your target before replacing JPEGs.
  • Metadata such as EXIF, GPS and ICC profiles is not copied to the output.

FAQ

Why does it say AVIF is not supported?

Your browser may be able to display AVIF but not encode it. Encoding support is separate and less common. The tool tests this directly. Try a recent Chromium-based browser, or use WebP instead.

Is AVIF better than WebP?

Often smaller at comparable quality, especially for photos, but encoding is slower and software support is narrower. Measure on your own images with the before/after slider.

What quality value works for AVIF?

The scale differs from JPEG, so a lower number can still look good. Start near 60 and adjust while watching the comparison.

Does the image leave my device?

No. Conversion is done locally in your browser.

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