// ABOUT QOI
QOI (Quite OK Image) is a modern lossless format designed for speed rather than maximum compression. It encodes and decodes 3–10x faster than PNG while producing files of comparable size. QOI is particularly valuable in developer toolchains, game asset pipelines, and real-time applications where CPU time is more important than file size.
// ABOUT BMP
BMP is an uncompressed raster format developed by Microsoft. It stores raw pixel data with no compression whatsoever, resulting in very large files but universal compatibility across Windows applications. BMP is most useful when a downstream tool or legacy application requires raw, uncompressed pixel data.
// WHY CONVERT
Converting QOI to BMP is useful when you need your image in a format suited for legacy Windows applications, game engines requiring uncompressed textures, hardware tools, and scenarios where decompression overhead must be zero. Since BMP stores raw pixel data, the resulting file will be significantly larger than the QOI source, but no quality is lost. Image Toolz runs the entire conversion directly in your browser. Nothing is uploaded to any server — your files remain completely private on your device. The tool handles images up to 200 MB and most conversions complete in under a second.
// FAQ
What is QOI?
QOI is a lossless format optimised for encode/decode speed in developer tooling.
What is BMP?
BMP is an uncompressed Windows format with universal Windows application compatibility.
Will converting QOI to BMP lose quality?
No. Both formats are lossless. Every pixel is preserved exactly.
Is it safe to convert my files here?
Yes. All conversion runs entirely in your browser. Your images are never uploaded to any server and nothing leaves your device.