Why convert AVIF to QOI?

QOI's small, easy-to-implement spec makes it popular in tooling that reads or writes QOI directly, where a dead-simple decoder matters more than AVIF's more elaborate — and heavier-to-implement — compression.

Is QOI output lossless?

Yes. QOI encoding is always lossless — every decoded pixel from the source AVIF is reproduced exactly. Note that because AVIF's own compression is more aggressive, the QOI file is often larger than the source despite both preserving the image losslessly.

What happens if the source AVIF is animated?

Only the first decodable frame is converted; the rest of the animation is discarded. Most AVIF files are static single images, so this only affects the less common animated (AVIS) profile — and AVIF decoding also depends on your browser's support.

Are my files uploaded?

No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.

What is validated before conversion?

The file must actually be an AVIF — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.

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AVIF to QOI Converter

Convert AVIF images to QOI (Quite OK Image), a fast, lossless, developer-focused format, directly in your browser.

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AVIF to QOI processes files locally in your browser.

What AVIF to QOI conversion does

Convert an AVIF image to QOI (Quite OK Image) directly in your browser. QOI trades AVIF's heavier, highly-tuned compression for a format that's deliberately tiny to implement — useful in developer and graphics-programming pipelines that read QOI directly rather than pulling in a full AVIF decoder.

How to convert AVIF to QOI

Choose a AVIF file.
Select Convert & download.
Save the .qoi file from your browser downloads.

Why use this conversion

QOI's small, easy-to-implement specification makes it popular in tooling built around reading or writing QOI directly, where a dead-simple decoder matters more than AVIF's more elaborate — and heavier-to-implement — compression.

Transparency and output quality

QOI supports a full alpha channel, and this tool preserves whatever alpha the source AVIF carried. QOI encoding is always lossless — every decoded pixel from the source AVIF is reproduced exactly, with no re-compression artifacts. Because AVIF itself compresses more aggressively than QOI's simple scheme, the .qoi file is often larger than the original .avif despite both being able to store the image losslessly.

Privacy and local processing

Processing occurs locally in the browser.
Files are not uploaded to Looty Tools for conversion.
Converted files remain on your device.

Limits and known issues

Input: AVIF (.avif) only, up to 25.0 MB and 8,192 px per side.
QOI is a developer-focused format with limited support in mainstream operating systems and browsers — it is intended for tooling and pipelines that read QOI directly, not general photo viewing.
If the source AVIF is animated, only its first frame is converted to QOI; the rest of the animation is discarded. Most AVIF files are static, so this only affects the less common animated (AVIS) profile.
Metadata is not preserved in the downloaded file.

Related tools

Guides

AVIF to QOI FAQ

Why convert AVIF to QOI?: QOI's small, easy-to-implement spec makes it popular in tooling that reads or writes QOI directly, where a dead-simple decoder matters more than AVIF's more elaborate — and heavier-to-implement — compression.
Is QOI output lossless?: Yes. QOI encoding is always lossless — every decoded pixel from the source AVIF is reproduced exactly. Note that because AVIF's own compression is more aggressive, the QOI file is often larger than the source despite both preserving the image losslessly.
Does QOI output keep transparency?: Yes. QOI supports a full alpha channel, and this tool preserves whatever alpha the source AVIF carried.
What happens if the source AVIF is animated?: Only the first decodable frame is converted; the rest of the animation is discarded. Most AVIF files are static single images, so this only affects the less common animated (AVIS) profile — and AVIF decoding also depends on your browser's support.
Are my files uploaded?: No. Conversion runs locally in your browser and does not upload your file to Looty Tools servers.
What is validated before conversion?: The file must actually be an AVIF — the tool checks the ISO-BMFF ftyp brand, not just the filename or extension, before decoding.