WebP to AVIF Converter
Convert WebP to AVIF, shrink dimensions, rename and download — all for free, with nothing ever leaving your device.
No upload · No sign-up · No subscription
Image Optimizer
No Images Yet
Support types: webp
Three steps, zero friction
Add your WebP images
Drag & drop or pick your .webp files. Thumbnails appear instantly.
Output is set to AVIF
We've preset the format to AVIF. Adjust quality or max width if you like, then hit Start.
Download the results
Compare before/after, rename, and export a single file or the whole batch.
WebP vs AVIF
How the two formats compare — so you know what changes when you convert.
| WebP | AVIF | |
|---|---|---|
| File size & compression | Small files with an excellent quality-to-size balance. | Smallest files — the best compression available today. |
| Browser support | All modern browsers — the safe web default. | All modern browsers (Chrome, Edge, Firefox, Safari 16+). |
| Transparency | Supported | Supported |
| Quality model | Lossy (adjustable quality) | Lossy (adjustable quality) |
| Best for | The all-round default for the web: small, well-supported. | Photos and graphics where the smallest file size matters most. |
Simple pricing
Start free, no account needed. Go Pro once — it's yours forever.
Free
No sign-in. Just open and optimize.
- Up to 10 images per batch
- WebP, AVIF, JPEG & PNG output
- Compression + smart resize
- Before / after compare
- Single-file download
- 100% private — no sign-in
Pro
First 10 customers just $9. Pay once, use forever.
Everything in Free, plus:
- Unlimited batch size
- Download all as .zip
- Bulk rename
- Config presets, synced across devices
- Per-image overrides
Sign in with Google to sync your license — your images still never leave your browser.
Your images are always processed in your browser and never uploaded. Pro only adds account-synced workflow tools.
Frequently asked questions
Are my WebP images uploaded anywhere?
No. Your images are converted on your own device and never sent anywhere — there is no upload step at all. Nothing to store, nothing to delete afterwards, because we never receive your files.
Will I lose quality converting WebP to AVIF?
AVIF is a lossy format, so re-encoding can lose a little detail — but at a high quality setting the difference is hard to see, and you control the quality slider before you start.
Does AVIF support transparency?
Yes — AVIF preserves transparent backgrounds, so alpha channels survive the conversion.
Can I convert many WebP files at once?
Yes — drop in a whole batch and convert them together, with a live before/after for each image. The Free plan handles up to 10 images per batch; Pro removes the limit and adds .zip export.
Convert a different format
Pick a source and target format, then go straight to that converter.