AVIF converter — AVIF to JPG, PNG, WebP and back
To open an AVIF file in any app, convert it to a standard format with AVIF to JPG or AVIF to PNG — free, in your browser, with nothing uploaded. And in the other direction, encoding to AVIF with PNG to AVIF or JPG to AVIF cuts image size roughly in half for faster pages.
This guide covers both directions: what AVIF actually is, how to get out of it when software refuses to open it, when it beats WebP, and how the conversion stays private because it runs entirely on your device.
What is an AVIF file — and why won't some apps open it?
AVIF (AV1 Image File Format) is a modern image format built on the AV1 video codec. Websites love it because it packs the same picture into a much smaller file than JPG, so pages load faster — which is exactly why images you save from the web increasingly arrive with an .avif extension.
The catch is two-speed adoption. Every current major browser displays AVIF, but plenty of desktop software still doesn't: older photo viewers, older editor versions, office apps and many upload forms simply refuse the file. So you end up with an image your browser shows happily and your other tools treat as unreadable.
The practical fix is a quick conversion to a universal format — and if you want the wider background on which format does what, the image format guide compares them all in one place.
AVIF to JPG or PNG — open your image anywhere
Here is the three-step fix for an .avif that won't open:
The result is a standard image that every app, editor and upload form accepts. One note on transparency: JPG doesn't support it, so transparent areas get flattened onto a solid background. If your AVIF has a transparent background — a logo, an icon, a cut-out — use AVIF to PNG instead: PNG keeps the transparency and the output is lossless.
Either way the file is decoded and re-encoded on your own device; it never travels to a server.
- Open AVIF to JPG and drop in your .avif file.
- Adjust the quality slider if you want a smaller or crisper JPG (the default is a good balance).
- Download the converted file — same image, universally readable extension.
Encode to AVIF — images about 50% smaller for faster pages
The reverse direction is a web-performance move. AVIF compresses roughly 50% smaller than JPEG at comparable visual quality, which is why audits like Lighthouse keep nagging you to "serve images in next-gen formats". Run your assets through PNG to AVIF or JPG to AVIF and the same pictures ship in half the bytes — faster loads, better Core Web Vitals, lower bandwidth bills.
PNG sources benefit the most: photographic screenshots and banners saved as PNG are often several times larger than they need to be. Already serving WebP? WebP to AVIF squeezes those files further still. Expect the biggest wins on photos and gradients; flat-color graphics with few colors compress well in any format.
AVIF vs WebP — browser support and when each wins
WebP is the older next-gen format: it has been supported by every major browser for years, and it typically lands 25–35% smaller than JPEG. AVIF is newer and compresses harder — especially at low quality settings, where it holds detail that WebP smudges — but full browser support only completed recently (Safari from 16.4, Edge from 121), so very old installed browsers may still not display it.
The practical split: choose AVIF when you control the site and modern compression matters most; choose WebP when you need the safest compatibility with the widest range of old devices. AVIF to WebP covers the compatibility direction, and WebP to AVIF the upgrade direction. For the WebP family itself — getting out of WebP into PNG or JPG — see the WebP converter guide.
A quality slider, no quotas — and nothing uploaded
Most converter sites process your image on their server, which is why they meter you: daily conversion credits, file-size caps, queues and sign-up walls. Carbide's Image Converter works differently — the page decodes and re-encodes the image in your browser using the device's own graphics stack. No server does the work, so there is nothing to meter and nothing to retain.
Lossy targets — JPG, WebP and AVIF — get a quality slider, so you can trade size against sharpness and see the output size before you save. Lossless PNG needs no tuning. Because your photo never leaves the device, the tools are safe for private images too, not just website assets. The full converter guide walks through every format pair the matrix supports.
Which conversion do you need?
Every AVIF direction has a dedicated tool — match your situation to the pair:
- Downloaded an .avif that won't open → AVIF to JPG.
- The image has transparency, or you want lossless output → AVIF to PNG.
- Need broad compatibility but still a small file → AVIF to WebP.
- Shrinking site images for speed → PNG to AVIF or JPG to AVIF.
- Already on WebP and want smaller still → WebP to AVIF.
- iPhone photos in HEIC instead? That family has its own guide: HEIC to JPG, PNG and WebP.
Frequently asked questions
Which browsers support AVIF?
All current major browsers display AVIF: Chrome and Edge, Firefox, and Safari from version 16.4. The gap is outside the browser — older desktop apps, editors and upload forms often reject .avif files, which is when converting with AVIF to JPG or AVIF to PNG solves it.
Is my image uploaded when I convert it?
No. The conversion runs entirely in your browser — the file is decoded, re-encoded and saved on your own device. Nothing is uploaded to a server, so the tools are safe for personal photos and unreleased design work alike.
Is AVIF lossy or lossless?
The format supports both. The browser encoder used by PNG to AVIF and JPG to AVIF is lossy with a quality slider — ideal for small web images. If you need a pixel-exact copy, keep the image as PNG, which is always lossless.
Is AVIF better than WebP?
For compression, usually yes — AVIF produces smaller files at the same visual quality, especially at aggressive settings. WebP wins on maturity: it has had universal browser support for longer and encodes faster. If in doubt, WebP is the safer default and WebP to AVIF is an easy upgrade later.
Is the AVIF converter free? Are there limits?
Yes, it's free — no sign-up, no watermark and no daily conversion credits. Because processing happens on your device rather than a metered server, the only practical limit is your browser's memory, which handles everyday images comfortably.
AVIF is worth adopting on your own site and occasionally annoying when someone else's site hands it to you. Both problems take seconds to solve: AVIF to JPG opens any stubborn file, and PNG to AVIF halves the images you serve — free, private and right in your browser.