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Compress AVIF

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AVIF files are already among the most compact widely-supported image format — typically 50% smaller than JPEG and 20–35% smaller than WebP at equivalent visual quality. There is less headroom to compress further than with JPEG or PNG, but re-encoding at a lower quality setting does produce measurably smaller files, particularly for images originally encoded at high quality settings. AVIF's AV1-based compression is also notably non-linear: the quality-to-size curve is steep at the high-quality end and flattens toward the low end. Dropping from quality 85 to 75 often saves proportionally more than dropping from 70 to 60. The encoder runs locally in your browser via WebAssembly — it is private, but takes a few seconds per image.

When you’d want to compress

Further reducing AVIF files that were encoded at high quality and need to hit a smaller target
Meeting a strict file-size budget for a high-traffic image on a CDN
Re-encoding AVIF source files at a tighter quality for less-critical uses like thumbnails
Experimenting with the quality-to-size curve to find the optimal setting for a specific image

What to watch for

AVIF artefacts at low quality settings look different from JPEG blockiness — they tend to manifest as smooth blurring and loss of texture. Evaluate output carefully at quality settings below 60.

Encoding takes several seconds per image — the browser runs the AV1 encoder in WebAssembly. Plan for longer processing times than JPEG or WebP.

Re-encoding a lossy AVIF stacks quality loss. For best results, compress from the highest-quality source (ideally lossless PNG or the original camera file).

How to Use

1
Drop your AVIF files onto the upload area or click to browse.
2
Select AVIF as the output format if it is not already selected.
3
Set the quality slider. 65–75 is a reasonable range for further-compressing a high-quality AVIF source.
4
Click Convert and wait a few seconds — AVIF encoding runs in WebAssembly and takes longer than JPEG or WebP.

Related Conversions

AVIF to WebP AVIF to JPEG AVIF to PNG

Compress Other Formats

Compress PNG Compress JPEG Compress WebP Compress GIF Compress BMP Compress HEIC

Related Guide

PNG vs JPG vs WebP vs AVIF

Frequently Asked Questions

Why compress AVIF when it is already an efficient format?

AVIF encoded at quality 90 is significantly larger than AVIF at quality 75 — the AV1 codec has a steep quality-to-size curve at the high end. If your source was encoded at high quality and you need to hit a specific file-size target, re-encoding at a lower setting can still cut 30–60% off the file size with acceptable visual impact.

How much smaller can AVIF get after re-encoding?

Dropping from quality 85 to 70 typically reduces file size by 40–55%. From quality 70 to 55, another 25–35% is typical. The savings are less predictable than JPEG because AVIF's non-linear encoder allocates bits very differently across the quality range.

Should I compress AVIF or convert to WebP for my site?

If all your visitors use modern browsers (2020+), keep AVIF — it is already the most efficient option. If you need to support older browsers or software that does not handle AVIF, converting to WebP is the better move. Use the Image Converter for format conversion, and this tool for quality reduction within the same format.

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