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AVIF to JPG converter

Convert AVIF files to JPG inside this page. No upload, no limit on how many, no watermark.

  • 0 uploads
  • No limits
  • No signup
  • Works offline

AVIF and JPG, side by side

AVIFJPEG
Released20191992
Compressionbothlossy
Transparencyyesno
Animationyesno
Supportall current browsers; limited elsewhereeverywhere, without exception

What actually changes

AVIF looks excellent and is refused by a lot of software. Converting to JPEG roughly doubles the file size and loses AVIF’s wide colour handling, but produces something that opens anywhere.

AVIF is a still image stored as a frame of AV1 video, with 10- and 12-bit colour and HDR support, released in 2019. Its real strength is that roughly half the size of JPEG at similar quality, with far better handling of gradients and flat colour. The reason you are on this page is almost certainly the other side of that coin: slow to encode — seconds rather than milliseconds for a large image — and thin support outside browsers.

JPEG arrived in 1992 and is the format the web was built on, using discrete cosine transform compression tuned for photographs. It gives you universal compatibility — every device, browser, printer and form on earth reads it. The trade-off worth knowing about before you commit: no transparency, visible ringing around sharp edges and text, and a compression scheme three decades behind the state of the art.

How the conversion works here

Your file is decoded in a Web Worker inside this browser tab — by the browser's own image pipeline where it can, and by a WebAssembly build of libheif or libavif where it cannot. The decoded pixels are then re-encoded with MozJPEG, the same encoder Squoosh uses.

All of that happens on the processor in front of you. There is no upload step, no queue and no server, which is why there is no size cap, no daily allowance and no paid tier — and why the whole thing keeps working with the network switched off.

Doing more than one thing

Most people converting a format also need it smaller or a different size. The result screen hands your converted files straight to the compressor or the resizer in one click — no second download, no re-selecting files. If you need several formats, the general converter lets you pick the output each time.

How it works

  1. 01Add your AVIF filesDrop them on the page, click to browse, paste from the clipboard, or drop a whole folder.
  2. 02Conversion runs on your deviceEach file is decoded and re-encoded as JPG by a WebAssembly codec in a background thread. Nothing is uploaded.
  3. 03Adjust if you need toMove the quality slider — 90 is visually indistinguishable from the source for most photographs.
  4. 04DownloadSave one file, or take the whole batch as a zip built on your device.

Questions people actually ask

Why convert AVIF to JPG?
AVIF is a still image stored as a frame of AV1 video, with 10- and 12-bit colour and HDR support. Its weakness is that slow to encode — seconds rather than milliseconds for a large image — and thin support outside browsers. JPEG gives you universal compatibility — every device, browser, printer and form on earth reads it, which is usually the reason people make this exact conversion.
Will I lose quality?
A little, unavoidably. AVIF and JPEG are both lossy, so this is a re-encode. At quality 90 the difference is invisible at normal viewing size; drop below about 75 and it starts to show in skin tones and gradients.
What happens to transparent areas?
JPEG has no alpha channel, so transparent pixels have to be flattened onto a colour. White is the default; use the colour picker to choose something else if the image is going onto a coloured background.
Is there a file size or batch limit?
No. Nothing is uploaded, so there is no bandwidth to pay for and nothing to ration. The only ceiling is your own device’s memory.
Are my files uploaded?
No. Open your browser’s developer tools, watch the Network tab, and convert something — no request carries your file. The counter in the page header measures the same thing continuously.
Where is JPEG supported?
Everywhere, without exception. JPEG arrived in 1992, and no transparency, visible ringing around sharp edges and text, and a compression scheme three decades behind the state of the art.

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