Free
$0
- 100% local compression, no image uploads
- Up to 50 images per batch
- Keeps nested folder structure in the ZIP
Swiftiny
Convert JPG to AVIF in batches, locally
Output format is set to AVIF on this page. Drop JPG photos (PNG and WebP work too), convert them in your browser, and download a ZIP. Folder paths stay intact. Nothing is uploaded.
Why convert photos to AVIFAVIF is usually much smaller than JPEG at similar quality, which helps product pages and blogs. Converting locally avoids upload limits on a whole catalog. Chrome and Safari can both display the files.
Drop images or folders here
Supports PNG, JPG, WebP, and AVIF. You can choose files or folders, and folder paths are kept in the zip.
Selected0 image(s)
Original size0 B
Output size0 B
Savings0%
Select or drop multiple images, then start compression. By default, the tool aims to reduce size while preserving visual quality, and you can compare sizes after processing.
Compression settings
Batch JPEG to AVIF without sending photos away
Online converters often reject large camera files or cap how many you can convert. Swiftiny converts in the browser: drop a folder of JPGs, keep quality around 75, and download .avif files named after the originals.
If you drop a nested catalog, the ZIP still has the same directories — only the extension changes. That makes it straightforward to swap assets on an ecommerce site that serves AVIF.
You can switch output back to JPG, PNG, or WebP in the settings. Free batches are limited to 50 images; Pro unlocks unlimited images per batch.
Frequently Asked Questions
Is JPG to AVIF conversion uploaded to a server?
No. Conversion runs in your browser. Your photos are not uploaded to Swiftiny.
Will Safari open the AVIF files?
Yes. Safari 16 and later displays AVIF. Encoding uses a wasm32 library, so Safari can convert as well as Chrome.
Should I use AVIF instead of JPEG or WebP?
For most modern websites, AVIF is smaller at similar quality. Keep JPEG or WebP if a CMS, email client, or older browser still requires it.
Pricing
Free to try. Pro when batches get big.
Compression still happens on your device. Pay once for unlimited images per batch — Creem handles checkout, cards, and tax.