How to use
- Drop your .avif files onto the box, or choose them. You can add up to 50 at once.
- Choose the quality (90 is a good start) and the background color for any transparent area.
- Download each JPG, or press Download all to get a ZIP.
Examples
photo.avif
→ photo.jpgThe JPG is usually larger than the AVIF.
An AVIF with a transparent background, background white
→ The picture on whiteAVIF can be transparent and JPG cannot.
An animated AVIF
→ A JPG of its first frameA JPG is a single picture.
Portrait.AVIF, Keep original size, quality 90
→ Portrait.jpg, same width and heightOnly the extension changes, so it is easy to find next to the original.
A 6000 × 4000 AVIF, width set to 2000
→ A 2000 × 1333 JPGSetting only the width keeps the proportions, and the height is rounded to a whole pixel.
How it works
This page is the image converter with AVIF to JPG already chosen. Your browser decodes the AVIF and the JPG is written by MozJPEG, an open-source encoder. Transparent pixels are painted onto your background color first. A file that the browser cannot decode is reported, not guessed at.
Why AVIF files turn up
AVIF is the still-picture format of the AV1 video codec, and it is efficient: a photo is often far smaller than the same photo as a JPG. Sites and apps that care about page weight therefore serve it to browsers that can show it. The catch is that the format is newer than most software. Many image editors, e-mail programs and upload forms were written before it existed and report a file they cannot open. Converting to JPG gives you a file that works nearly everywhere.
What to expect from the result
The JPG will be larger than the AVIF at a similar look, because JPG needs more bytes for the same detail. The conversion is also one more lossy step, so keep the AVIF if it is the only copy of the picture. Quality 90 is a good start for photos; the page shows each size so you can step down until the file fits your limit.
| Goal | Setting |
|---|---|
| Keep the look, accept a larger file | Quality 90 to 95 |
| Fit an upload limit | Quality 80 and a smaller width |
| A thumbnail | Width 400 to 800 |
Browser support matters here
The page does not decode the AVIF itself. Your browser does that before the JPG is written. A browser that cannot show AVIF cannot convert it either, and the page says so instead of producing a blank picture. Update the browser, or open the page in a current one.
Sources
Frequently asked questions
- What is AVIF?
- A picture format based on the AV1 video codec. Photos are often much smaller than in JPG at a similar look. Current browsers show it, but many programs, e-mail clients and upload forms do not.
- Why is the JPG bigger?
- JPG is an older format that compresses less efficiently, so the same picture needs more bytes. That is the price of a file that every program opens.
- Does converting lose quality?
- A little, since the picture is written again as a lossy JPG. At quality 90 it is hard to see.
- Does my browser need to support AVIF?
- Yes, this page uses your browser to read the AVIF. Current Chrome, Edge, Firefox and Safari do. If yours does not, the page says the file cannot be read.
- Which browser versions can show AVIF?
- According to MDN, Chrome 85, Opera 71, Firefox 93, Safari 16.1 and Edge 121 and later. On an older version, update the browser or open the file in a newer one, then convert.
- Why did I get an AVIF file in the first place?
- Some websites and apps send AVIF to browsers that can display it, because it is smaller than JPG. When you save the picture, you get the AVIF that was sent, not a JPG.
- Can I make the JPG smaller than the AVIF?
- Rarely at the same look. Lower the quality, or set a smaller width or height, since fewer pixels shrink the file far more than the quality does. The page shows the size of every result so you can try.
- Is transparency kept?
- No. A JPG cannot store it. Transparent areas are filled with the background color you choose. If you need to keep transparency, make a PNG or a WebP with the image converter instead.
- Are my pictures uploaded?
- No. They are converted in your browser.
Related tools
Guides
Version history
- 1.0.4 — Adds why AVIF files turn up, what to expect from the JPG, the browser versions that can read AVIF, and more examples and questions.
- 1.0.3 — Puts the format and quality options and the size options on one line on a wide screen, instead of two lines with empty space beside them.
- 1.0.2 — Makes the search title and description state the supported task, key formats and privacy benefit more clearly.
- 1.0.1 — Reports conversion completion and failure to connected workflows, so batch runs wait for the full result and ignore cancelled or superseded work.
- 1.0.0 — First release.