What Is an AVIF File and How to Open It on Any Device (Free)
An AVIF file is a next-generation image format created by Google, Apple, and Netflix. Most devices cannot open it yet because it is too new. The fastest fix: go to StackFlow AVIF to JPG Converter → upload your AVIF file → click Convert → download as JPG. Done in under 30 seconds. Free, no signup, file never uploaded to any server.
You downloaded an image from a website. It saved to your phone or computer with a strange extension you have never seen before — .avif. You try to open it. Nothing works. Your photo app says the format is not supported. You try to attach it to an email and the recipient cannot view it. You feel confused because it was just a normal image on a website.
This is happening to more and more people every year. AVIF is a brand new image format that major websites are switching to because it loads faster — but most people’s devices have not caught up yet. In this guide you will learn exactly what an AVIF file is, why your device cannot open it, and how to convert it to a standard JPG in about 20 seconds, completely free.
What Is an AVIF File?
AVIF stands for AV1 Image File Format. It was developed by a group of the world’s biggest tech companies — Google, Apple, Netflix, Amazon, and Mozilla — who came together to create a better image format for the internet.
The reason they built it is simple. Old formats like JPG were invented in 1992, over 30 years ago. The internet has changed dramatically since then. Images are now one of the biggest reasons websites load slowly, especially on mobile phones. AVIF can compress an image to half the size of a JPG while keeping the same visual quality. For big websites that serve millions of images every day, this saves huge amounts of server storage and makes pages load much faster.
Google started using AVIF on YouTube and Google Images. Netflix uses it for movie thumbnails. Amazon uses it for product photos. Because all these platforms switched to AVIF, when you download an image from any of these sites, you get an AVIF file on your device — even though you never asked for it.
AVIF was developed by the Alliance for Open Media — a group that includes Google, Apple, Netflix, Amazon, Microsoft, and Mozilla. It was officially released in 2019 and started appearing on major websites in 2021. Because these companies control the platforms where billions of images are served every day, AVIF spread very quickly even though most end users had no idea it was happening.
Here is how AVIF compares to the image formats you already know:
| Feature | JPG (1992) | PNG (1996) | WebP (2010) | AVIF (2020) |
|---|---|---|---|---|
| File size | Large | Very large | Small | Smallest ✅ |
| Image quality | Good | Excellent | Very good | Best ✅ |
| Transparency | ❌ No | ✅ Yes | ✅ Yes | ✅ Yes |
| Device support | Universal ✅ | Universal ✅ | Most modern | ⚠️ Limited (new) |
| Used by | Everyone | Designers | Google, Meta | Netflix, YouTube, Amazon |
As you can see, AVIF is the most efficient format in every category — smaller file size, better quality, more features. This is exactly why large tech companies adopted it so quickly. The problem is that most regular devices and apps have not caught up yet.
Why Can't My Device Open AVIF?
The short answer is that AVIF is so new that most apps and operating systems do not yet know how to handle it.
AVIF was only widely adopted starting around 2021 and 2022. Your photo apps, image editors, email clients, and older operating systems were all built before AVIF existed, so they have no built-in way to read it. When your app tries to open the file, it sees a format it does not recognize and either shows an error or a blank screen.
Think of it this way — if you tried to play a DVD in a VHS player, it would not work. Not because anything is broken, but because the VHS player was built before DVDs were invented. Here is exactly what can open AVIF and what cannot:
| App / Device | Can Open AVIF? | Notes |
|---|---|---|
| Google Chrome browser | ✅ Yes | Full support since 2020 |
| Mozilla Firefox | ✅ Yes | Full support since 2021 |
| Microsoft Edge | ✅ Yes | Full support |
| Windows 11 Photos app | ✅ Yes | Native support built in |
| Windows 10 Photos app | ❌ No | Cannot open — convert first |
| iPhone / iOS 16+ | ✅ Yes | Native support |
| iPhone / iOS 15 or older | ❌ No | Cannot open — convert first |
| Android (Chrome app) | ✅ Yes | Works in Chrome browser |
| Android Gallery app | ⚠️ Varies | Depends on phone brand and Android version |
| Adobe Photoshop 2023+ | ✅ Yes | Native support added |
| Adobe Photoshop older versions | ❌ No | Convert to JPG first |
| WhatsApp, Gmail, social apps | ❌ No | Will not attach or display — convert first |
The cleanest solution in almost every situation is to convert the AVIF file to JPG. JPG works on 100% of devices, 100% of apps, and has been the standard for 30 years. Once you convert it you never have to think about compatibility again.
How to Convert AVIF to JPG in 20 Seconds
Here is the simplest method. It works on any device — Windows, Mac, Android, iPhone. No software to install, no account to create.
Go to stackflowtools.com/avif-to-jpg-converter. No account needed. Works on mobile and desktop. No software to install.
Click the upload area or drag your .avif file directly onto it. You can also convert multiple AVIF files at once — just select them all together.
Select JPG for maximum compatibility with all devices and apps. Select PNG if your image has a transparent background and you need to keep it. Select WebP if you are using the image on a website.
The conversion runs entirely in your browser — your file never leaves your device. When done, click Download. Your new JPG file is ready to use anywhere.
That is all. The conversion takes about 5 to 15 seconds. The output is a standard JPG that will open in any photo app on any device in the world.
Does Converting AVIF to JPG Reduce Quality?
AVIF and JPG are both what is called “lossy” formats — they both reduce file size by removing some data. When you convert AVIF to JPG at high quality, the visual difference is so small that a human eye looking at both images side by side would struggle to tell them apart.
The only situation where you might notice a difference is if you are zoomed in to 200% comparing pixels. For any real-world use — printing, sharing, uploading, social media, government forms — the converted JPG will look perfectly fine.
One important thing to know: AVIF supports transparent backgrounds but JPG does not. If your AVIF image has a transparent background — common for logos and product images — converting to JPG will replace the transparency with a white background. If you need to keep the transparency, save as PNG instead of JPG.
Why Are Websites Using AVIF More and More?
Google has been directly rewarding fast-loading websites with higher search rankings since 2021 through its Core Web Vitals system. This pushed every serious website owner to switch to modern image formats like AVIF and WebP. As more websites make this switch, more people will be downloading AVIF files without realizing it.
This means AVIF files will become more common in your daily life, not less. Knowing how to convert them to JPG is a genuinely useful skill to have right now.
Frequently Asked Questions
Can I compress an image to exactly 100KB — not just under 100KB?
The tool compresses to your target size or just below it — for example 97KB or 99KB when you set 100KB. This is perfectly fine because portals only check that your file does not exceed the limit. Being slightly under is always accepted.
Does compressing a JPG multiple times damage the image?
Yes — this is called generation loss. Every time you save a JPG using lossy compression it loses a small amount of quality. The solution is simple: always compress from your original file, never from a previously compressed version. Keep your originals safe.
Can I compress a PNG image to under 100KB?
PNG uses lossless compression so it cannot be reduced as aggressively as JPG. If your portal accepts JPG, convert your PNG to JPG first using our WebP to JPG Converter — you will get a much smaller file at the same visual quality.
What is the smallest size I can compress an image to before it looks bad?
For a portrait-style photo at 600×600 pixels, 20KB is usually the practical minimum. Below that, compression artifacts — blocky and blurry patches — start to become visible. For larger dimension images the minimum before quality drops is higher.
Does this tool work on mobile phones?
Yes. The StackFlow Image Size Compressor works on any modern mobile browser including Chrome, Safari, and Firefox on Android and iPhone. Processing runs directly on your phone hardware, so it is just as fast and just as private as on a desktop or laptop.
Is my photo safe when I use this tool?
Yes — completely. All compression happens inside your browser using your own device. Your image is never uploaded to any server. There is no cloud processing, no storage, and no one can access your file. The moment you close the tab, nothing remains anywhere.
Final Thoughts
AVIF is not going away — it is going to become the standard image format of the internet over the next few years as more devices and apps add support for it. But right now in 2026, most of the world still needs JPG for everyday use. The good news is that converting is instant, free, and requires no technical knowledge at all. Bookmark the StackFlow AVIF to JPG converter so it is ready the next time you encounter an AVIF file you cannot open.
Free forever · No signup · File never leaves your device. Convert AVIF to JPG Now — Free →