AVIF to JPEG converter

AVIF → JPG flattened our transparent AVIF derivative into RGB JPEG pixels, growing 1,689 bytes to 2,290 bytes at quality 90.

Converted with Image engine · input deleted within 24 h
Free: 5 conversions a day · 5 MB each
Higher limits →

From real runs

What you get — and what changes

Element	Result	What happens
Visible pixels	Kept	The decoded AVIF image content was written into a standard JPEG that our image engine opened as RGB.
Transparency	Lost	The alpha channel from the AVIF made from our PNG was flattened because JPEG has no transparent pixels.
Background fill	Changed	A green background option was accepted for flattening, though JPEG compression nudged sampled colors slightly.
Metadata	Lost	The output JPEG reported JFIF fields only, not the AVIF color and auxiliary metadata package.
File size	Changed	The transparent 1,689 byte AVIF became a 2,290 byte JPEG at the tested quality setting.
Compression generation	Changed	The route decodes AVIF and then applies JPEG compression, so it adds a new lossy generation.

Visible pixels Kept
The decoded AVIF image content was written into a standard JPEG that our image engine opened as RGB.
Transparency Lost
The alpha channel from the AVIF made from our PNG was flattened because JPEG has no transparent pixels.
Background fill Changed
A green background option was accepted for flattening, though JPEG compression nudged sampled colors slightly.
Metadata Lost
The output JPEG reported JFIF fields only, not the AVIF color and auxiliary metadata package.
File size Changed
The transparent 1,689 byte AVIF became a 2,290 byte JPEG at the tested quality setting.
Compression generation Changed
The route decodes AVIF and then applies JPEG compression, so it adds a new lossy generation.

Sample conversions

Transparent AVIF logo

Input: A 96×64 AVIF created from an alpha PNG, 1,689 bytes, with transparent corners around colored shapes.
Output: A 2,290 byte JPEG in RGB mode. The transparent regions were filled before compression.

AVIF photo for a JPEG-only portal

Input: A modern AVIF photo downloaded from a site whose support form only accepts .jpg uploads.
Output: A baseline JPEG that opened in the legacy portal. AVIF compression decisions remained baked into the decoded pixels.

A real AVIF → JPEG run

We converted our AVIF sample (15 KB) with Image engine on 2026-10-20. It took 34 ms and produced a 40 KB JPEG file, 2.6× larger than the input. The engine raised 2 warnings, listed below.

Input · sample.avif · 15 KB

1200 × 800 px, avif

Width: 1,200
Height: 800
Encoding: avif

Output · sample.jpg · 40 KB

1200 × 800 px, baseline

Width: 1,200
Height: 800
Encoding: baseline

Transparency filled with #ffffff for JPG output.
Image metadata stripped from output.

Is your file a scan?

AVIF → JPG does not recognize text in screenshots or scanned pages. Convert with OCR if the goal is searchable content rather than image compatibility.

Options and when to change them

background: Choose the matte color before converting AVIF artwork with transparency to JPG.
quality: Use a higher value for product images and a lower value for previews where another lossy pass is acceptable.
width: Resize during conversion when the JPEG destination has maximum pixel dimensions.
height: Pair with width and fit when the output must land in a fixed JPG box.

Do it yourself

ImageMagick 7 with AVIF support

bash

magick in.avif -background white -alpha remove -quality 90 out.jpg

Codec support and color handling depend on the ImageMagick build installed on your machine.

AVIF to JPEG by API or MCP

The HTTP API and the MCP server run the exact engine this page uses (Image engine); the response carries the same warnings the web converter shows. Check support first with GET /api/v1/pairs?from=avif&to=jpg.

curl

curl -X POST https://filetypeconverters.com/api/v1/convert \
  -H "Authorization: Bearer $FTC_API_KEY" \
  -F "file=@input.avif" -F "from=avif" -F "to=jpg" \
  -F 'options={"width":0}' \
  --output output.jpg

Options this engine accepts for AVIF → JPEG

Key	Applies to	Type	Default
width	Writing JPEG	number	0
height	Writing JPEG	number	0
fit	Writing JPEG	contain · cover · fill	contain
quality	Writing JPEG	number	90
background	Writing JPEG	string	#ffffff
stripMetadata	Writing JPEG	boolean	true

API reference

When this is the wrong conversion

Use AVIF → PNG if the source has transparency that must remain transparent.
Keep AVIF for modern web delivery when compatibility is already sufficient.
Find the original source image if you need to avoid another lossy compression generation.

AVIF to JPEG questions

Will AVIF transparency survive in JPG?

No. The image has to be flattened because JPEG is opaque. Set the background color before converting artwork with soft edges.

Why can AVIF → JPG get larger?

AVIF is usually a denser modern codec. Our 1,689 byte AVIF became a 2,290 byte JPEG after flattening and JPEG encoding.

Does this improve AVIF quality?

No. It makes the file easier for JPEG-only systems to read, but it cannot restore detail already discarded by AVIF compression.