Why AVIF files need converting to JPG
AVIF is a young image format. The Alliance for Open Media published it in 2019, building it on the AV1 video codec, and it often matches the look of a JPG at around half the file size. That is why so many websites now serve pictures as AVIF: the page loads faster and the browser displays the image without complaint.
The trouble starts once the picture leaves the browser. Plenty of desktop editors, office suites, marketplace listing forms, job portals and photo-printing services still accept only JPG or PNG. Windows needs an extra AV1 extension before its Photos app will open an AVIF file, and older phones show a blank icon. Converting AVIF to JPG trades a little efficiency for a file that opens everywhere.
How the AVIF to JPG conversion works
When you drop files onto the tool, the page reads the first bytes of each one to learn what it really is, since file names are often wrong. It then asks your browser to decode the AVIF image, draws the pixels onto a canvas and encodes that canvas as a JPG at the quality you chose. The finished JPG appears in the list with its new size and dimensions, ready to download on its own or together with the rest.
Because the work happens on your device, there is no upload queue and no server limit on how many files you convert in a day. Speed depends on your computer: a typical phone photo takes well under a second on a laptop, while a very large panorama takes a few seconds. Chrome has decoded AVIF since version 85, Firefox since 93, Safari since 16 and Edge since 121, so any current browser handles the conversion.
Choosing a JPG quality setting
JPG is a lossy format, so the quality slider decides how much detail the encoder keeps. The default of 92 percent is a safe choice for photos you might print or edit again; differences from the original are very hard to see. Settings between 80 and 88 percent produce noticeably smaller files and still look clean on screens, which suits email attachments and web uploads with size caps.
Expect the JPG to be larger than the AVIF it came from, often one and a half to three times larger at high quality. That is not a fault of the conversion: AVIF simply compresses better, and a JPG needs more bytes to hold the same picture. If an upload form limits file size, lower the quality a step at a time and use Apply new settings to redo the batch without adding the files again.
Transparency, HDR and color in AVIF files
AVIF can store a transparent background, but JPG cannot. Any transparent or semi-transparent pixels are placed over the fill color you pick before the JPG is written; white is the default, and a color matching the page or document where the image will sit usually looks best. If you need to keep transparency, convert to PNG instead.
Some AVIF images carry 10-bit color or HDR brightness that a JPG cannot represent. The browser maps those images to standard 8-bit color while drawing them, so very bright highlights can flatten slightly and smooth gradients may show faint banding. Wide-gamut colors are converted to sRGB, the space nearly every JPG viewer expects. For ordinary photos and graphics the result looks the same as the AVIF did on screen.
Metadata, file names and batch downloads
Writing a new JPG through the canvas does not carry over EXIF or XMP metadata, so camera details and any GPS location embedded in an AVIF file are dropped. That is often welcome before sharing a picture publicly; if you need the metadata, keep the original AVIF alongside the JPG.
Each converted file keeps its original name with a .jpg extension. When two sources share a name, the second becomes name (2).jpg, so nothing is overwritten inside the archive. You can add up to 100 images per batch, then download them one by one or press Download all to save a single ZIP. The archive stores the JPGs as they are, which keeps zipping quick even for large batches.
Where AVIF images come from
Most AVIF files people want to convert were saved from a web page. Image delivery networks look at the browser asking for a picture and hand modern browsers an AVIF copy, even when the link ends in .jpg, so a right-click save produces a file your other apps refuse to open. Screenshots and exports from design tools, compression apps and some newer cameras can end up as AVIF too.
If a picture you saved from a website will not open, check its first bytes rather than its extension. This converter does exactly that, which is why it also accepts WebP, PNG, GIF and BMP images and turns them into JPG. A file that is already a JPEG is renamed without being encoded again, so it loses nothing.
When an AVIF file will not convert
An error next to a file almost always has one of three causes. The browser may be too old to decode AVIF, which updating it fixes. The file may not be an image at all, such as a web page saved with an .avif name, and then there is nothing to convert. Or it may be a damaged HEIC photo from an iPhone. Healthy HEIC files, a close cousin of AVIF, convert here as well, and the HEIC to JPG converter explains that format in detail.
Very large images can fail on phones, because mobile browsers cap how many pixels a canvas may hold, often around 16 megapixels on iPhones. A laptop or desktop browser has far more room, so open the page there for panoramas and scans, and the AVIF to JPG conversion will go through.
When to keep AVIF, or convert to PNG instead
Keep the AVIF when the image is going back onto a website you control; it is smaller and every current browser displays it. Convert AVIF to JPG when a person or a program on the other end needs a photo they can open without thinking about formats.
Choose PNG when the image has a transparent background, sharp text or flat colors you plan to edit, because PNG is lossless and keeps transparency. Our AVIF to PNG converter works the same way and also runs entirely in your browser.