Why convert JPG to AVIF?

AVIF uses modern compression that typically produces files 30-50% smaller than JPEG at the same visual quality, which speeds up web pages and saves storage. It is supported by current versions of Chrome, Edge, Firefox and Safari.

How much smaller will my AVIF files be?

It varies with the image and the quality setting, but AVIF is typically 30-50% smaller than the equivalent JPEG. Each converted image shows its new byte size so you can compare against the original.

What quality setting should I use?

The slider runs from 10% to 100% and defaults to 60%, which keeps photos looking sharp while saving a lot of space. Lower it for thumbnails and previews; raise it toward 90-100% for hero images where detail matters.

Does the image keep its original dimensions?

Yes. The picture is drawn onto a canvas at its full natural width and height, so the pixel dimensions are unchanged — only the encoding and file size differ.

Can I convert several JPGs at once?

Yes. Drop multiple files and each is converted in turn, with its own new size and download button.

Are my images uploaded to a server?

No. Conversion happens entirely in your browser using the HTML canvas — your photos are never uploaded, stored or seen by anyone.

How accurate is the conversion?

The image is decoded and re-drawn at its original pixel dimensions, then re-encoded as AVIF at the quality you choose. AVIF is a lossy format, so very high quality settings keep detail close to the original while still shrinking the file.

JPG to AVIF Converter

Convert JPG photos to AVIF without uploading them

AVIF is a modern image format based on the AV1 video codec. For the same visual quality it is usually far smaller than JPEG, so pages load faster and you store less. This tool re-encodes your JPG photos as AVIF using a quality slider you control, with no upload and no signup.

How it works

Each JPG is decoded and drawn onto an HTML <canvas> at its original pixel dimensions. The canvas is then re-encoded by your browser with canvas.toBlob("image/avif", quality), where the quality slider (10%–100%, 60% by default) maps to the AVIF encoder’s quality setting. The result is offered as a downloadable .avif file showing its new byte size. All of this happens on your device — AVIF encoding requires a recent browser (Chrome, Edge, Firefox or Safari); if yours can’t encode AVIF, the tool tells you.

Example

A 1.8 MB JPEG photo re-encoded at the default 60% quality typically lands around 0.6–0.9 MB as AVIF — roughly a 50–65% reduction — while staying visually close to the original at full resolution. Drop the slider to 40% for a lighter preview, or raise it to 90% to preserve fine detail in a hero image.

Everything runs locally in your browser — your photos are never uploaded, stored, or seen by anyone, which makes it both faster (no upload wait) and private by design.