Convert JPG to AVIF Online
Encode your JPEG photos as AVIF, the AV1-based image format modern browsers read, at a fixed quality of 80. There is no quality slider on this page, and camera metadata is not copied into the output.
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Why convert JPG to AVIF
A JPEG cannot get much smaller without being re-encoded, and re-encoding it as JPEG again just adds artifacts for little gain. AVIF uses intra-frame AV1 coding inside a HEIF container, which handles gradients, flat areas and film grain more economically, so for the same perceived detail it usually needs noticeably fewer bytes than the JPEG it came from. That is the whole reason this conversion exists: page weight, not compatibility.
Here the work happens on our servers. libvips decodes the JPEG, applies its stored orientation to the pixels, and hands the image to the AV1 encoder at quality 80. That single setting is fixed in the pipeline; there is no effort level, chroma mode, speed preset or target file size to pick. Progressive JPEGs are fine, and a CMYK JPEG is converted to sRGB before encoding. A JPEG XL file that was saved with a .jpg extension is detected by its content and decoded properly instead of failing.
The pixels and dimensions carry over unchanged, and the result is sRGB. What does not carry over is the metadata: EXIF, the capture date, GPS coordinates and any embedded ICC profile are not written into the AVIF, so keep your original JPEG if those tags matter to you. Adobe RGB input is converted to sRGB, which clips colors outside that space. And because your JPEG was already lossy, this is a second generation of loss. If you still have a PNG, TIFF or RAW export of the same shot, converting that gives a cleaner AVIF than going through JPEG.
The people who need this are usually building websites: serving AVIF inside a picture element with a JPEG fallback, trimming hero images, or testing what a gallery weighs in a modern format. Note that older browsers and a lot of desktop software still cannot open .avif, so this is an addition to your JPEG, not a replacement for it.
How to convert JPG to AVIF
- Start from the best JPEG you have. Avoid a file that has already been re-saved several times, since each save bakes in more artifacts that AVIF will then have to reproduce.
- Add your .jpg, .jpeg or .jfif files. One request takes up to 10 files as a guest or free user, 25 on Plus and 50 on Pro, within a 50 MB per-file limit for guests and 100 MB once you sign in.
- Start the conversion and let the upload complete. AV1 encoding is heavier than JPEG or PNG encoding, so give it a few seconds per photo, and longer for big images.
- Download each AVIF file from the results list, within the four-hour window.
- Compare the file size against the source JPEG, and serve the AVIF with a JPEG fallback so visitors on older browsers still see an image.
What you get on this page
- AVIF encoded by libvips with the aom AV1 encoder at quality 80, the same setting for every file so results are predictable across a batch.
- Accepts baseline, progressive and CMYK JPEG, and the aliases .jpeg and .jfif, with CMYK converted to sRGB.
- Content sniffing catches mislabeled files, including a JPEG XL misnamed .jpg and a video renamed with an image extension, which is rejected with a clear message rather than a broken output.
- Orientation from the JPEG is applied to the pixels, so an image shot sideways is written upright in the AVIF.
- Original width and height are kept exactly; nothing is resized to fit a web target.
- Batch conversion in one request, up to 10, 25 or 50 files depending on your plan.
Video Tutorial
Watch this step-by-step tutorial to learn how to convert JPG files to AVIF format online for free using MiConvert.com. No software installation required.
JPG to AVIF questions
Can I choose the compression level or target file size?
Not on this page. The quality is fixed at 80 and there are no DPI, effort or chroma controls. If you need to tune the encoder, a local tool such as ImageMagick or a command-line AVIF encoder gives you those parameters; our page is for getting a good default quickly.
Will the AVIF always be smaller than my JPG?
Usually it is clearly smaller, especially for large photos. But a small image that was already compressed hard as JPEG can come out similar in size or even larger, because quality 80 AVIF may encode more detail than the JPEG retained. Always check the resulting size before you ship it.
Does the AVIF keep my EXIF data, shooting date or GPS location?
No. Our converter does not write EXIF or ICC data into the AVIF output, so those tags are lost. Keep the original JPEG as your archive copy if you need the capture information, and note that this also means you should not rely on this page as a way to strip location data, since nothing is guaranteed about what other tools may read.
Can I batch convert a whole folder of JPGs?
You can select multiple files, up to your plan's batch size of 10, 25 or 50 per request. There is no folder upload, no recursive processing and no single archive of all outputs, so each AVIF is downloaded individually. Very large photo libraries are better scripted locally.
What opens an AVIF file after conversion?
Current Chrome, Edge, Firefox and Safari display AVIF, and many recent image viewers and editors read it too. Older browsers, older Windows and macOS releases, and plenty of desktop software still do not, which is why AVIF on the web is normally paired with a JPEG fallback.
Do I need Photoshop or any plugin installed?
No. The conversion runs in a worker process on our servers after you upload, so nothing is installed and nothing is encoded on your device. You only need a browser and the file.
Can I go back from AVIF to JPG?
Yes, we convert AVIF to JPG as well, but it is another lossy re-encode on top of this one. If you may need the JPEG later, keep the original rather than round-tripping.
What happens to my files after the conversion?
The JPEG you uploaded is deleted as soon as the job ends. The AVIF can be downloaded for about four hours, then it is removed automatically. Transfers run over HTTPS and the download link is an unguessable token that is not tied to your account, so anyone with the link can use it until it expires. File names, sizes and outcomes are recorded in our logs.