Convert
AVIF converter
Turn JPG, PNG, WebP and iPhone HEIC photos into small AVIF files, or turn AVIF images into JPG, PNG or WebP when an app cannot open them.
Each new file is opened again and checked: it is really the chosen format, it has the right size, and it still looks like the original.
Fine-tune quality
Files
How it works
Add, choose, convert
- Add images. AVIF, JPG, PNG, WebP or HEIC, up to 100 at a time.
- Choose the format. AVIF files are set to become JPG and everything else to become AVIF, but you can pick any of AVIF, JPG, PNG or WebP.
- Choose the quality. Smaller file, Balanced or Best quality, or fine-tune it. You can also limit the longest side.
- Convert and download. Each file shows its old and new size. Compare a result with the original, download it, or download everything as a ZIP.
Which format?
When AVIF helps, and when it does not
AVIF usually makes photos much smaller than JPG at the same look, often half the size or less, and keeps transparency. It is a good choice for websites and for sharing with people on current phones and browsers. Current Chrome, Edge, Firefox and Safari (iOS 16 and macOS Ventura and later) open it, but some older apps, email programs and online forms cannot yet.
When an AVIF does not open somewhere, convert it to JPG, which opens everywhere. Choose PNG for screenshots and graphics that must stay pixel-perfect, and WebP as a compact format that most apps already support.
Good to know
Quality, transparency and speed
AVIF reaches the same look at a lower quality number than JPG, so the presets use different numbers for each format. Transparent areas are kept in AVIF, PNG and WebP and filled with white in JPG. Encoding AVIF is demanding: a 12-megapixel photo takes a few seconds on a computer and longer on a phone. Photos keep their orientation, and location and camera data are not copied into the new files.
FAQ
Questions about AVIF.
What is an AVIF file?
AVIF is a modern image format based on the AV1 video codec. It stores photos in much less space than JPG at a similar look, supports transparency and wide colour, and is supported by all current major browsers.
How do I open an AVIF file that will not open?
Convert it to JPG here: add the AVIF and the format is already set to JPG. JPG opens in every app, device and online form. Choose PNG instead if you need transparency or exact pixels.
How much smaller is AVIF than JPG?
It depends on the picture, but photos are often half the size of a good JPG or less at a similar look. The tool shows the old and new size of every file, so you can see the saving for your own images.
Why is my converted file larger than the original?
Converting a small, already compressed image into a format that keeps more detail can make it larger, and PNG is always much larger for photos. Choose AVIF, WebP or JPG with the Smaller file setting to reduce the size.
Is transparency kept?
Yes for AVIF, PNG and WebP. JPG has no transparency, so transparent areas are filled with white, and the tool tells you when that happened.
Are my images uploaded?
No. Decoding and encoding run in your browser, using codecs loaded from this website. Your images, their names and the results are never sent anywhere.