The File That Won't Cooperate
You right-clicked an image on a website, hit "Save image as," and got a file ending in `.avif`. Then you double-clicked it and one of three things happened: Windows Photos shrugged, Photoshop threw an error, or the thing opened in your browser but absolutely nowhere else.
You did nothing wrong. AVIF is one of the newest image formats on the web, and it's in that awkward window where the internet has adopted it faster than the apps on your computer have. Big sites serve it to save bandwidth; your decade-old photo software has no idea what it is.
Here's what an AVIF file actually is, why you're suddenly running into them everywhere, and how to turn one into something every device on earth can open.
What AVIF Actually Is
AVIF stands for AV1 Image File Format. The name gives away the trick: it's a single still frame pulled out of AV1, a modern video codec built by the Alliance for Open Media — a group that includes Google, Netflix, Amazon, Microsoft, and Mozilla.
That's the key insight. AVIF borrows the compression brains of a cutting-edge video codec and points them at a single image. Video codecs are obsessive about throwing away data humans can't perceive while keeping everything that matters, and AVIF inherits all of that cleverness.
The result is genuinely impressive:
In other words, AVIF is trying to be the one format that replaces JPEG, PNG, and GIF all at once. On paper, it mostly succeeds.
Why You're Suddenly Seeing Them
A few years ago, almost nobody served AVIF. Now you bump into it constantly, and there's a simple reason: bandwidth is money.
A photo-heavy website that switches from JPEG to AVIF can cut its image payload roughly in half. That means faster page loads, lower hosting bills, and better search rankings (Google rewards fast sites). For a company serving millions of images a day, that's an enormous saving for essentially zero downside — so the moment browsers started supporting AVIF, the big platforms flipped the switch.
Chrome, Edge, Firefox, and Safari all display AVIF now. So when you're browsing, everything looks normal. The friction only shows up the instant you try to take the file *off* the web and into a desktop app — because that's where support is still patchy.
Why It Won't Open
The web caught up to AVIF years before the desktop did. As of right now:
So you end up in the worst spot: the image looked perfect in your browser, but the second you saved it, half your software pretended it didn't exist.
This is the exact same growing pain the web went through with WebP a few years ago — and if you've ever wrestled with a WebP file that won't open, this will feel familiar. New format, slow desktop support, lots of confused right-clicks.
The Fix: Convert It to Something Universal
You don't need to wait for your apps to catch up. You just need to turn the AVIF into a format that already works everywhere. Which one depends on what's in the image.
AVIF → JPG (for photos)
If it's a photograph — a product shot, a landscape, a screenshot of a photo-heavy page — convert it to JPG. JPEG is the most universally supported image format on the planet; there is no device made in the last 25 years that can't open one. Drop your file into AVIF to JPG and you'll get a file that opens in Photos, Preview, Photoshop, Word, and every email client without complaint.
You'll lose AVIF's transparency (JPEG can't do transparent backgrounds), but for ordinary photos that doesn't matter at all.
AVIF → PNG (for graphics, logos, or anything transparent)
If the image has a transparent background, sharp edges, text, or flat areas of color — a logo, an icon, a UI screenshot, a sticker — convert it to PNG instead. PNG is lossless and keeps transparency intact. Run it through AVIF to PNG and the result will be crisp and universally openable.
PNG files are bigger than the AVIF you started with, but they're the safe choice when you need transparency or pixel-perfect graphics.
Not Sure? Use the General Converter
If you're juggling a mix of files, or you want to land on a different format entirely (WebP, BMP, TIFF), the all-purpose image converter lets you pick your output. For a folder full of AVIFs you just want to deal with once, it's the fastest path.
Should You Be Using AVIF Yourself?
Here's the flip side: if you're building a website, AVIF is fantastic. Smaller files, sharper images, faster loads. The trick is to serve it with a fallback so older browsers still get a JPEG — most modern site frameworks and image CDNs handle that automatically.
For everyday personal use — photos you're texting to family, images going into a Word doc, anything you're emailing — AVIF is more trouble than it's worth right now. The recipient might not be able to open it, and you'll be the one explaining why. Stick to JPEG for sharing until desktop support fully catches up, which it eventually will.
If you want to keep AVIF's size advantage without its compatibility headaches, you don't actually need the format at all — a well-compressed JPEG gets most of the way there. Run a heavy photo through an image compressor and you'll shrink it dramatically while keeping a format everyone can open.
Bottom Line
AVIF isn't a broken file or a virus or a weird mistake. It's the newest, most efficient image format on the web — a single frame borrowed from a state-of-the-art video codec — and it's genuinely better than JPEG in almost every measurable way.
The only problem is timing. The internet adopted it faster than the apps on your computer did, so you keep saving images your software can't open.
The fix takes ten seconds: convert it. AVIF to JPG for photos, AVIF to PNG for anything with transparency, and you've got a file that opens on every device made this century. Let the web keep its fancy new format. You just need the picture.