You saved an image from a website, and now nothing will open it. Your photo editor refuses, the file preview is blank, and the upload form on another site rejects it. The culprit is almost always the .avif extension — a modern image format that compresses beautifully but still isn't supported everywhere. Converting it to JPG or PNG makes the image usable again.
What is AVIF?
AVIF stands for AV1 Image File Format. It is a next-generation image format built on the AV1 video codec, the same royalty-free codec developed by the Alliance for Open Media for streaming video. AVIF takes a single AV1 keyframe and wraps it in an image container, which means it inherits AV1's very efficient compression.
In practice, AVIF tends to produce noticeably smaller files than JPEG at a comparable visual quality, which is why websites have adopted it to speed up page loads and cut bandwidth. But AVIF is more than just small files. It also supports features that older formats cannot handle in a single image:
- Wide color gamut and HDR — AVIF can store more than 8 bits per channel, preserving the bright highlights and rich colors used in HDR photography and modern displays.
- Alpha transparency — like PNG, AVIF can include a transparency channel.
- Both lossy and lossless modes, so it can act like a JPG or like a PNG depending on how it was encoded.
In short, AVIF is a capable, forward-looking format. The problem isn't the format itself — it's that the rest of your software hasn't caught up.
Why you keep running into AVIF files
A few years ago you rarely saw AVIF. Today it shows up constantly, mostly because more websites serve images in AVIF automatically to save bandwidth. When you right-click and save an image, your browser hands you exactly what it downloaded — and increasingly that is an .avif file rather than a .jpg.
This is fine while the image stays in your browser, which knows how to decode it. The trouble starts the moment you try to use the file somewhere else:
- Image editors — many older or lightweight editors still can't open AVIF, or need an extra plugin.
- Office software — word processors, slide decks, and design templates frequently reject AVIF on import.
- Apps and social platforms — some upload forms and messaging apps don't accept AVIF, so they silently fail or refuse the file.
- Older devices and operating systems — a system that predates AVIF support won't generate thumbnails or previews.
Because AVIF support is still uneven across the software world, the reliable fix is to convert the image into a format that everything understands: JPG or PNG.
AVIF vs WebP vs JPG
AVIF isn't the only modern format competing with the old JPEG standard. WebP arrived earlier and is also widely served on the web. Here's how the three compare:
| Format | Compression | Transparency / HDR | Support | Best use |
|---|---|---|---|---|
| AVIF | Excellent — typically smaller than JPG at similar quality | Yes — alpha transparency and HDR / wide gamut | Modern browsers decode it; many editors and apps still don't | Web delivery where the smallest high-quality file matters |
| WebP | Very good — better than JPG | Yes — alpha transparency, no full HDR | Broad browser and app support, more than AVIF | Web images needing wide compatibility |
| JPG | Good — the long-standing baseline | No transparency, standard 8-bit color | Universal — every app, device, and platform | Sharing photos anywhere, guaranteed to open |
The takeaway: AVIF wins on file size and capability, JPG wins on universal compatibility, and WebP sits in between. When you've received an AVIF file and just need to use it, converting down to JPG or PNG trades a little file efficiency for the assurance that the image opens everywhere.
When to convert to JPG vs PNG
The right target format depends on what you're doing with the image.
Choose JPG for universal sharing
JPG is the safest possible format. Every email client, social network, printing service, document tool, and operating system accepts it. If your goal is simply to send a photo, post it, or insert it into a document, convert to JPG. JPG uses lossy compression, so it keeps file sizes reasonable — ideal for photographs and complex images where a tiny amount of compression is invisible.
Choose PNG for lossless quality or transparency
Pick PNG when you need a pixel-perfect, lossless copy or when the original AVIF has a transparent background. JPG cannot store transparency and will fill those areas with a solid color, so any logo, icon, sticker, or screenshot with see-through regions should become a AVIF to PNG Converter export instead. PNG is also better for graphics with sharp edges and text, where JPG compression can introduce fuzzy artifacts.
If you're not sure, JPG is the more common choice for photos and PNG is the safer choice for graphics, screenshots, and anything with transparency.
A note on browser support
Most modern browsers can decode AVIF natively today, and that native decoder is exactly what makes in-browser conversion possible. This tool relies on your browser's built-in AVIF support to read the file. On an up-to-date browser this works seamlessly. On a very old browser that predates AVIF support, the image may fail to load — in that case, updating your browser or using a different recent one resolves it.
How AVIF conversion works in your browser
Converting an AVIF file doesn't require any server or upload. Everything happens locally on your own device:
- Your browser natively decodes the AVIF image into raw pixels, the same way it does when displaying an AVIF on a web page.
- Those pixels are drawn onto an HTML5 Canvas element in memory.
- The Canvas re-encodes the pixels into the format you choose — JPG or PNG.
- The result is handed back to you as a download.
Because the decode-and-re-encode round trip runs entirely in your browser, your image never leaves your computer. There is no upload, no server processing, and no copy stored anywhere online. For private photos, work documents, screenshots, and anything sensitive, that local-only approach matters — the file stays yours from start to finish.
How to convert AVIF to JPG or PNG
- Open the AVIF to JPG Converter
- Drop in your
.aviffile or select it from your device - Choose your output format — JPG for universal sharing, PNG for lossless quality or transparency
- Adjust quality if you're exporting JPG and want to balance size against detail
- Download the converted image instantly, ready to use anywhere
If you have several AVIF files in different formats, or you want to convert between many image types at once, the general Image Converter handles AVIF alongside JPG, PNG, WebP, and more. And if your freshly converted JPG or PNG is larger than you'd like, run it through the Image Compressor to shrink it back down without uploading anything.
AVIF is a genuinely good format, and you'll keep encountering it as more of the web adopts it. But until every app and platform supports it, a quick local conversion to JPG or PNG is the simplest way to make any AVIF image work wherever you need it — privately, instantly, and for free.