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Convert JPG to AVIF

Convert JPG to AVIF: upload a .jpg file and download it as .avif. No signup, no watermarks. The quality, transparency and file size effects are explained below.

Upload a .jpg file and download it as .avif. JPG is universal format for photographs, while AVIF is next-generation format with superior compression — below you can see exactly what changes in the conversion.

JPG → AVIF

Drop one .jpg file here

or click to choose · up to 50 MB

Files are uploaded to Sirv for processing. Do not upload confidential or sensitive images.

Should You Convert JPG to AVIF?

Conversion changes how your image is stored, not what it shows. Switching from JPG to AVIF trades one set of strengths for another, so it helps to know which side of that trade you are on.

Good reasons to switch

  • ✓ Best compression ratio
  • ✓ HDR support
  • ✓ Supports transparency
  • ✓ You need the file in a program or platform that only accepts .avif

Better off staying with JPG

  • ✗ Universal support — conversion does not remove this trade-off
  • ✗ Good compression for photos — conversion does not remove this trade-off
  • ✗ Fast encoding — conversion does not remove this trade-off
  • ✗ Nothing about your current workflow requires .avif

What Changes When You Convert

Quality

Both formats support lossy compression, so quality depends on the settings used. A high-quality AVIF export is visually indistinguishable from the JPG original for almost all content.

Transparency

JPG cannot store transparency, so there is nothing to preserve here — but if you later need a transparent version, convert from your original rather than from this AVIF copy.

Animation

The output is a still image. To animate it you would need dedicated frames or an animated source.

File size

Expect a meaningful size drop: AVIF files are typically around 50% smaller than JPEG at the same quality.

JPG vs AVIF: Format Comparison

Feature JPG AVIF
Compression Lossy only Lossy and lossless
Transparency No Yes
Animation No Yes
Typical size the baseline most photo formats are measured against typically around 50% smaller than JPEG at the same quality
Best for Photographs, Complex images, Legacy support required High-quality photography, HDR content, Bandwidth-critical sites
Browser support 100% 92%
Extension / MIME .jpg · image/jpeg .avif · image/avif

How the Converter Works

  1. Upload — drop your .jpg file into the tool above. It is uploaded to Sirv for processing; do not use confidential images.
  2. Convert — the file is re-encoded as .avif with sensible default quality settings.
  3. Download — the response is checked for a successful status, the expected MIME type, and a valid image signature before download.

Frequently Asked Questions

Does converting JPG to AVIF lose quality?
A little, yes — AVIF is a lossy format, so the encoder discards data it considers invisible. At typical quality settings the difference is imperceptible for photos. If you plan to edit the image further, keep a copy of the JPG original.
Will the AVIF file be smaller than my JPG file?
Expect a meaningful size drop: AVIF files are typically around 50% smaller than JPEG at the same quality.
Is this JPG to AVIF converter free?
Yes — free, with no signup and no watermarks. Your image is uploaded to Sirv so the converted file can be generated.
Can I convert back later without losing more quality?
You can always convert back, but each lossy re-encode compounds slightly. The safe habit: keep your original .jpg file as the master, and treat every converted .avif as a derived copy.

Go Deeper

JPG guide →

Compression settings, tools, and pitfalls for .jpg files.
AVIF guide →

Get the most out of .avif: optimization, quality, and delivery.
JPG converter →

Convert any supported format to JPG, or JPG to anything else.
AVIF converter →

Convert any supported format to AVIF, or AVIF to anything else.