FREE JPEG TO AVIF CONVERTER

Convert JPEG to AVIF

AVIF is where a photograph can get genuinely small. Converting a JPEG to AVIF is the most effective single step for shrinking photo-heavy pages, and it is the format modern image pipelines reach for first when bandwidth matters.

Private by design. Your files stay on your device.

Drop your images here

Images, folders, or ZIPs. Add files, choose your settings, then convert.

PNG, JPEG, WebP, GIF, BMP & TIFF · Up to 15.0 MB per image

Conversion settings

Conversion settings

A little fine-tuning goes a long way

Output format

Smaller files, a little more processing.

Higher quality means larger files.

Lower speeds prioritize compression.

Longest side · Keeps the original proportions

Your images 0

Your added images will appear here

One image downloads directly. Multiple images download as a ZIP.

CONVERT JPEG TO AVIF

The smallest option for photographs

Photographs contain smooth gradients and fine texture, and AVIF excels at both. Where JPEG begins to show blocky artefacts at low quality, AVIF keeps the image looking clean while using fewer bytes. On a gallery or blog with many photographs, converting to AVIF can meaningfully reduce what a visitor has to download.

What to keep in mind

Test a few photos first

Every photograph responds differently. Convert one or two, compare them at full size against the originals, then apply the setting you are happy with to the rest of the batch.

Encoding takes longer than WebP

Plan for AVIF to take more time, particularly with lower encoding speeds. If you are converting a large library, consider working in batches and letting each one finish.

Keep a JPEG master

AVIF is for delivery, not for archiving or further editing. Store the original JPEG and convert a copy, so you never have to re-encode an already compressed file.

Questions about this conversion

Should I convert my photos to AVIF or WebP?

AVIF usually produces the smaller file for photographs, at the cost of slower encoding. Choose WebP if you want quick results and the widest possible platform support. Both are a clear improvement on an unconverted JPEG.

How much smaller will a photo get?

It depends on the photograph and your quality setting, but the saving is often substantial compared with the source JPEG. Whistle reports the before and after size for each image so you can see the actual result.

Can I still use my JPEG files afterwards?

Yes, provided you keep them. Whistle never alters your originals and does not upload them anywhere. The converted AVIF is a separate download.

Is AVIF good for sharing on social media?

Not always. Some platforms re-encode uploads or reject formats they do not expect. AVIF is at its best when you control how the image is served, such as on your own website.