Free
$0
- 100% local compression, no image uploads
- Up to 50 images per batch
- Keeps nested folder structure in the ZIP
Swiftiny
Compress AVIF images online, on your device
Drop AVIF files or folders. Swiftiny re-encodes them in your browser so already-converted assets can get smaller still. Nested folders stay in the ZIP. Nothing is uploaded.
Why compress AVIF hereExports that are already AVIF are not always well compressed. A second local pass can cut weight on a design folder without sending files out. Chrome and Safari both encode and decode AVIF here.
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
Re-compress AVIF batches privately
If your pipeline already outputs AVIF, you may still want a smaller quality/size tradeoff before deploy. Swiftiny does that in the browser, with the same folder-preserving ZIP as PNG, JPG, and WebP.
Use the quality slider and Deep mode when you need more savings. Switch output to JPG or WebP only if a tool downstream cannot read AVIF.
Free use processes up to 50 images per batch. Pro removes the cap with a one-time purchase.
Frequently Asked Questions
Do you upload AVIF files to compress them?
No. AVIF encoding runs locally in your browser with WebAssembly.
Can I mix AVIF with PNG, JPG, and WebP in one batch?
Yes. Swiftiny accepts PNG, JPG, WebP, and AVIF in the same folder. Set output to Keep original format or convert everything to one format.
Does this work in Safari as well as Chrome?
Yes. Decoding uses the browser’s built-in AVIF support. Encoding uses a wasm32 encoder that does not require Chrome-only Memory64.
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.