AVIF Converter
An AVIF converter should produce an AVIF file, not a PNG with a new extension. This one runs a real AVIF encoder inside the browser, so the output opens as AVIF and your images never leave the device.
Drop images here, or browse your files
JPEG, PNG, WebP, AVIF and BMP. Up to 200 images per batch, 50 MB per file.
Files are read locally by your browser and are never uploaded to a server.
Queue
No images yet
Images you add appear here with a preview, their file size, progress and any errors.
Settings
→ AVIF
Keeps the capture date, camera model and other details.
AVIF is built on AV1 and is the most efficient still-image format in common use. The same photo often weighs half as much as its JPG version and noticeably less than WebP, with little visible difference. The catch is that browsers cannot write it on their own, which is why a working AVIF converter needs an encoder of its own.
This page accepts JPG, PNG, WebP and BMP, and always writes AVIF.
Why this page can produce a real AVIF
A browser canvas can only encode JPEG, PNG and WebP. Ask it for AVIF and it does not fail — it silently hands back a PNG, so the conversion looks successful while the file is the wrong format.
This site ships its own AVIF encoder, compiled to WebAssembly and run inside the browser. It loads only when AVIF is the chosen output, so JPG and WebP users never pay for it.
When AVIF is the right target
- Web images. Every current browser renders AVIF, and a smaller file loads faster and costs less bandwidth.
- Photographs. Gradients, skies and skin tones show the format’s advantage most clearly.
- Transparency without the PNG weight. AVIF carries alpha, so it can replace some PNG use cases.
It is the wrong target when the receiving software only reads JPG, when the image goes into an older design tool, or when it is an email attachment for someone unfamiliar with newer formats.
One lossy step
AVIF is encoded at quality 0.9 by default, which is a lossy pass. On photographs it is invisible; on text screenshots and fine line art it can soften edges slightly.
Start from the highest-resolution original rather than re-converting an image that has already been compressed.
How to use it
- Drop in images. JPG, PNG, WebP and BMP all work, one file or a batch.
- Conversion starts on import. The output format is already pinned to AVIF.
- Give it a moment. AVIF is slower than WebP; the progress bar reflects the real state.
- Check the card. It shows
source → AVIFalong with both sizes. - Download. Save files individually, or take the batch as a ZIP.
One caveat
AVIF’s advantage assumes equal visual quality. If the original is already small or the content is very simple, the AVIF version may not shrink at all and could even grow. The size comparison on each card tells you exactly what happened.
AVIF next to the other formats
AVIF wins on size, but it is not always the format the receiving side accepts. When a site takes only the mainstream three, WebP is the next best step down in weight, JPG is the safest universal choice, and PNG is what keeps flat graphics and transparency intact.
Moving between them is the job of the format converter, which covers the cases this page does not: going back out of AVIF, or opening an image the browser cannot decode on its own.
Frequently asked questions
How do I use this AVIF converter?+
Drop one image or a whole batch into the panel below. AVIF is pinned as the output, conversion starts on import, and each file downloads on its own or as a single ZIP.
Is the output a real AVIF file?+
Yes. A browser canvas cannot encode AVIF and quietly returns a PNG when asked, so this site bundles its own encoder in WebAssembly and loads it only when AVIF is the chosen format.
How much smaller is AVIF than JPG?+
It depends on the picture. Photographs commonly shrink by about half, and busy gradients gain even more; flat graphics gain little. The card shows the real before and after size for each file.
Why is AVIF slower to produce than WebP?+
AVIF encoding is simply more computation-heavy. A normal photo takes a few seconds here; a batch needs a little patience, and the progress bar reports where it is.
Is transparency preserved?+
Yes. AVIF carries an alpha channel, so transparent areas from a PNG come through instead of being filled with white.
How compatible is AVIF?+
Every current browser displays it, but some older design tools, office suites and upload forms still refuse it. JPG or PNG remains safer for those.
Is EXIF metadata kept?+
Not at the moment. AVIF stores metadata in the container's item table rather than the JPEG-style block, and that part is not carried over yet, so the option is not offered.
Related
Tools
More like this
- Convert Images to JPG — Convert to JPG: turn PNG, WebP, AVIF or BMP into the most widely accepted image format. Batch conversion in your browser, no upload, ZIP export.
- Convert Images to PNG — Convert to PNG: turn JPG, WebP, AVIF or BMP into lossless PNG with the alpha channel intact. Batch conversion in your browser, no upload required.
- Convert Image to WebP — Convert image to WebP without uploading: turn JPG, PNG, AVIF or BMP into lighter web images that keep their transparency, one file or a whole batch.
Guides
- JPEG, PNG, WebP and AVIF explained — When each format is the right answer, what transparency costs you, and how EXIF orientation quietly affects every rotated photo.