HEIC to AVIF Converter

You are moving iPhone photos to a web project and would like to try AVIF, a format that aims for small files. This page converts HEIC to AVIF in your browser tab when your browser is able to write AVIF. If it cannot, the AVIF button is disabled, and we say so rather than quietly giving you another format.

Drop images here, click to choose, or paste with Ctrl+V
HEIC files · many files at once · nothing is uploaded

How to convert HEIC to AVIF

  1. Add your HEIC files by dropping them, clicking the drop zone or pasting.
  2. The output format is already set to AVIF. Adjust quality or size if you need to.
  3. Press Convert and compare the original and new size for each file.
  4. Download each file or all of them as a ZIP.

When to convert, and when not to

  • You are experimenting with AVIF for a site you control.
  • You want to compare AVIF with JPG and WebP on the same phone photo.
  • Your visitors use current browsers, or you provide a fallback.
  • Do not convert if your browser disables the AVIF button, or if the destination needs a widely supported format. JPG is the safe choice.

What changes

  • Your browser must support writing AVIF. Without that, the AVIF button is greyed out with a note.
  • The HEIC is decoded first, then compressed again as AVIF, so quality settings apply.
  • Writing AVIF can take longer than other formats, especially for large photos.
  • Only the first image is used; a Live Photo becomes a still.
  • Shooting date and location are not carried over.

AVIF needs support from your browser

Not every browser can create AVIF files. This page tests your browser when it loads and disables the option when the browser cannot produce a real AVIF. A file with the wrong type would be misleading, so the button stays unavailable instead.

If the option is off for you, use a current desktop version of Chrome or Edge, or choose WebP or JPG from the format list.

Treat the first conversion as a trial. Use a single photo, check that the AVIF opens in the browsers you care about, and only then run a whole folder.

Remember that the page checks support when it loads. If you open it in another browser, the answer can change, so a disabled button in one browser does not mean the tool is broken in another.

Why try AVIF for phone photos

AVIF is designed to keep image files small, which helps pages load faster. HEIC photos from a phone are a reasonable starting point because they hold a lot of detail.

Results differ from one picture to the next, so test your own. Convert a photo to AVIF, WebP and JPG, compare the sizes in the list, and open them side by side to look for differences.

Try the same HEIC as JPG and WebP too. Reading three sizes side by side tells you whether AVIF is worth the extra care for your type of pictures.

Plan a fallback

Software that is not up to date may not display AVIF. If your site must work everywhere, publish an AVIF with a JPG or WebP alternative, or keep to a format that your whole audience can open.

Large photos also take memory and time to process, so convert in smaller groups on a phone.

AVIF creation can be demanding for large images, so reducing the dimensions with the resize options helps both speed and memory on a phone.

As with other lossy formats, keep your original HEIC photos. An AVIF made from a HEIC is a compressed copy, and you can always make another one with different settings.

Privacy: your files stay on your device

  • The tool decodes, resizes and encodes your pictures with your browser. The files are never sent to a server.
  • To check it yourself: open the browser developer tools (F12), open the Network tab, convert a file, and look for any request that carries your image. You will see none.

Frequently asked questions

Why is the AVIF button disabled?

Your browser cannot write AVIF. Try a current Chrome or Edge, or choose another format.

Is AVIF always smaller than JPG?

Often, but not for every picture. Check the sizes shown for your own files.

Is the conversion slow?

AVIF encoding can take longer than other formats, particularly for large photos.

What happens to Live Photos?

You get the still picture, not the video.

Do you upload my photos?

No. Everything is processed in your browser.

What if I need AVIF but my browser cannot write it?

Use another browser or computer for the conversion, or pick WebP or JPG, which almost every browser can write.

Should I keep the HEIC files?

Yes. They are your best source if you later want another size, format or quality setting. Do not delete them after converting.

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