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Convert WebP to AVIF

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

Upload a .webp file and download it as .avif. WebP is modern format with excellent compression and quality balance, while AVIF is next-generation format with superior compression — below you can see exactly what changes in the conversion.

WebP → AVIF

Drop one .webp 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 WebP to AVIF?

Conversion changes how your image is stored, not what it shows. Switching from WebP 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 WebP

  • ✗ Smaller file sizes than JPEG/PNG — conversion does not remove this trade-off
  • ✗ Supports transparency — conversion does not remove this trade-off
  • ✗ Supports animation — 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 WebP original for almost all content.

Transparency

Transparency is preserved when converting between these two formats.

Animation

Animation support varies by converter; most single-file conversions produce a still image from frame one.

File size

File size depends on content: AVIF files are typically around 50% smaller than JPEG at the same quality, while WebP files are typically 25-35% smaller than JPEG at the same quality.

WebP vs AVIF: Format Comparison

Feature WebP AVIF
Compression Lossy and lossless Lossy and lossless
Transparency Yes Yes
Animation Yes Yes
Typical size typically 25-35% smaller than JPEG at the same quality typically around 50% smaller than JPEG at the same quality
Best for Web images, E-commerce products, Blog images High-quality photography, HDR content, Bandwidth-critical sites
Browser support 96% 92%
Extension / MIME .webp · image/webp .avif · image/avif

How the Converter Works

  1. Upload — drop your .webp 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 WebP 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 WebP original.
Will the AVIF file be smaller than my WebP file?
File size depends on content: AVIF files are typically around 50% smaller than JPEG at the same quality, while WebP files are typically 25-35% smaller than JPEG at the same quality.
Is this WebP 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 .webp file as the master, and treat every converted .avif as a derived copy.

Go Deeper

WebP guide →

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

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

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

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