// ABOUT HEIC
HEIC (High Efficiency Image Container) is Apple's default camera format on iPhone and iPad since iOS 11. It uses the HEVC video codec to achieve roughly 50% better compression than JPEG at equivalent quality. HEIC supports transparency, depth maps, and burst sequences. However, HEIC encoding requires a commercial HEVC licence, so this tool supports HEIC as an input-only format.
// 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.
// WHY CONVERT
Converting HEIC to QOI is useful when you need your image in a format suited for game asset pipelines, real-time texture streaming, build tools, developer workflows, and any context where encode/decode speed is critical. Note that converting from a lossy source (HEIC) to a lossless target (QOI) preserves the existing quality but cannot recover detail already lost during the original compression. 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 HEIC?
HEIC is Apple's default photo format on iPhone and iPad.
What is QOI?
QOI is a lossless format optimised for fast encode/decode in developer pipelines.
Will converting HEIC to QOI lose quality?
No additional loss. The QOI is a lossless copy of the decoded HEIC pixels.
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.