Compress AVIF
Encode AVIF at the size and quality you want using the AV1 encoder compiled to WebAssembly. Compare before and after with a slider, see the exact size saving per file, and keep the original automatically if it is already smaller.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
JPG, PNG, WebP, HEIC, AVIF, GIF, TIFF, SVG, RAW, PSD, JXL, BMP, ICO and more
How to use Compress AVIF
- 1
Drop your images, choose files, or paste from the clipboard.
- 2
Adjust the options. The preview updates as you change them.
- 3
Click Compress. Files are processed on your device.
- 4
Download each result or everything as a ZIP.
Why use Aback Images for compress avif
Best-in-class encoders
MozJPEG for JPG, OxiPNG and palette quantisation for PNG, libwebp and libavif for WebP and AVIF, all compiled to WebAssembly.
Live before/after
See the result and its file size on your actual image before processing the batch.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
Never bigger than the original
If compression cannot beat your file, the original is returned unchanged with a note.
About Compress AVIF
Lossy vs lossless compression
Lossy compression (JPG, WebP, AVIF) discards detail the eye barely notices; you control how much with the slider. Lossless compression (PNG with OxiPNG, lossless WebP) only repacks data more efficiently, so every pixel stays identical.
Smart palette mode for PNG is lossy: it reduces the image to at most 256 carefully chosen colours with dithering, which often cuts screenshots and graphics by 60-80% with no visible change.
Which format compresses best?
For photos on the web, AVIF is usually smallest, then WebP, then JPG. For screenshots and graphics, PNG with a smart palette or lossless WebP wins. Not sure? The format shoot-out tests all of them at equal visual quality.
Related tools
Shrink JPG, PNG, WebP, AVIF and GIF files with MozJPEG, OxiPNG and modern codecs, with a live before/after preview.
Make JPEG photos smaller with MozJPEG, the encoder that beats standard JPEG by 10-15% at the same quality.
Cut PNG size by up to 80% with smart palette reduction and OxiPNG lossless optimisation, keeping transparency.
Re-encode WebP images smaller with libwebp's best settings, including animated WebP.
Shrink animated GIFs by reducing colours, dropping frames and resizing, while keeping the animation.
Hit a file-size limit for forms and uploads. Searches quality, then dimensions, and can pad up to a minimum.
Finds the smallest file that still looks identical to your original, measured with SSIM instead of guessing a quality number.
Encodes your image as JPG, WebP and AVIF at the same visual quality and keeps the smallest one.
Frequently asked questions
How much smaller will my images get?
Typical photos shrink 40-80% at the Balanced setting. Screenshots and graphics saved as PNG often shrink 60-80% with smart palette mode. Already well-compressed files gain less.
Will compression remove EXIF data?
Yes by default, which also removes GPS location. Turn on Keep EXIF metadata under More options if you need the camera details.
Does it work with animated GIFs?
Yes. Animation is preserved; size drops by reducing the palette and, if you choose, dropping frames or dimensions.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.