// 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 JPEG
JPEG uses lossy compression optimised for photographic content. It discards visual information the human eye is unlikely to notice, achieving compression ratios of 10:1 or higher with minimal perceptible quality loss. JPEG does not support transparency — any alpha channel is flattened against a white background.
// WHY CONVERT
Converting QOI to JPEG is useful when you need your image in a format suited for photographs, web images, email attachments, social media uploads, and any scenario where small file size matters more than pixel-perfect accuracy. Because JPEG uses lossy compression, some fine detail may be lost in the conversion — but for photographic content the difference is usually imperceptible. 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 used in developer tooling. It has excellent encode/decode speed but limited consumer support.
What is JPEG?
JPEG is the universal photographic format, supported by every platform and application.
Will converting QOI to JPEG lose quality?
Yes. JPEG is lossy. The degree of quality loss depends on the compression setting. At quality 80–90% the loss is usually imperceptible for photographic content.
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.