Convert QOI to BMP Online Free

Convert QOI images to BMP format instantly in your browser. BMP is an uncompressed lossless format with broad compatibility in legacy Windows software.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

ChangeThisFile converts QOI to BMP instantly in your browser using the Canvas API. No file upload needed — your image stays on your device. Drop your QOI and download the result in seconds. Free and completely private.

Free No signup required Files stay on your device Instant conversion Updated April 2026

Convert QOI to BMP

Drop your QOI file here to convert it instantly

Drag & drop your .qoi file here, or click to browse

Convert to BMP instantly

QOI vs BMP: Format Comparison

Key differences between the two formats

Feature	QOI	BMP
Compression	Lossless run-length encoding	None (raw pixels, no compression)
File size	Moderate — light compression	Very large — no compression
Encoding speed	Very fast	Very fast — no processing
Color depth	24-bit RGB or 32-bit RGBA	Up to 32-bit RGBA
Software support	Needs library support	Universal on Windows, broad elsewhere
Metadata support	None	Minimal (bitmap header only)
Best for	Game assets, real-time rendering	Legacy software, raw pixel storage

When to Convert

Common scenarios where this conversion is useful

Legacy Windows software compatibility

Older Windows applications require BMP input and cannot read QOI. Converting QOI game art or graphics to BMP ensures compatibility with legacy tools that predate modern formats.

Raw pixel data for image processing

Some image processing scripts and tools read BMP as a simple binary format for direct pixel manipulation. Converting QOI to BMP gives an uncompressed buffer these tools can consume without a decoder library.

Hardware display system input

Embedded display controllers and frame buffers often accept raw BMP or similar uncompressed formats. Converting QOI images to BMP provides a format these hardware systems can load directly.

Lossless roundtrip with full color

Both QOI and BMP are lossless, so converting between them preserves every pixel exactly. Use this when you need to work in an environment that accepts BMP but your source assets are in QOI.

How to Convert QOI to BMP

1

Select your QOI file

Drag and drop your QOI file onto the converter, or click browse to choose from your files.
2

Instant conversion

The browser converts your QOI to BMP locally using the Canvas API. No upload needed and no data leaves your device.
3

Download the BMP

Save your converted BMP file. Ready to use immediately in any Windows or compatible application.

Frequently Asked Questions

Why convert QOI to BMP?

BMP has universal compatibility in Windows environments and is accepted by legacy software, image processing tools, and embedded systems. QOI requires a specific library to open, which not all tools have.

Will the BMP be larger than the QOI?

Almost certainly yes. BMP stores pixels with no compression, while QOI uses a simple lossless encoding. A QOI file is typically 30-60% smaller than the equivalent uncompressed BMP.

Is this conversion lossless?

Yes. Both QOI and BMP are lossless formats. Every pixel from your QOI will be stored exactly in the BMP output — no quality loss.

Does this upload my file?

No. Everything runs in your browser using the Canvas API. Your QOI file never leaves your device.

What software opens BMP files?

BMP is universally supported on Windows (Paint, Photos, Photoshop, etc.) and broadly supported on macOS and Linux via Preview, GIMP, and most image viewers.

Does QOI transparency transfer to BMP?

Partially. Standard BMP does not support transparency. If your QOI has an alpha channel (RGBA), the transparent areas will typically be rendered as white or black in the BMP output.

What is QOI format?

QOI (Quite OK Image) is a fast lossless image format from 2021. It encodes 24-bit RGB or 32-bit RGBA pixel data with a simple algorithm that is faster to decode than PNG.

Is there a file size limit?

No server limit — conversion is local. The practical limit is your browser's available RAM. QOI files are generally moderate sized, so this is rarely a constraint.

Can I convert back from BMP to QOI?

Yes. Use the BMP to QOI converter on ChangeThisFile to convert in the reverse direction. Both conversions are lossless, so you can roundtrip between the formats without any quality change.

What browsers support this conversion?

Chrome, Firefox, Safari, and Edge all support the Canvas API used for this conversion. ChangeThisFile uses a JavaScript QOI decoder, so QOI input works in any modern browser without native QOI support.