HEIC to JPG Converter - Free, No Upload

What HEIC to JPG Conversion Does

HEIC is the filename you see, but the format underneath is HEIF — the High Efficiency Image File Format, an ISO container that Apple adopted as the default camera format in iOS 11. Inside that container the actual picture is compressed with HEVC, the same codec used for 4K video, which is why a HEIC photo is typically half the size of the JPG your phone would otherwise have written at comparable quality. The container can also hold things JPG has no concept of: an alpha channel, 10-bit colour depth, depth maps used for Portrait mode, image sequences for Live Photos, and multiple images bundled as a single file. Converting to JPG means fully decoding the HEVC-compressed picture back to raw pixels and then re-encoding those pixels with JPG's much older DCT compression. That is a genuine transcode, not a rename, and it is why the process is measurably slower than the header edits some other tools on this site perform. This converter does that decode in your browser using libheif compiled to WebAssembly. The first image you convert has to download and instantiate that WebAssembly module, which takes a few seconds; subsequent images reuse the loaded module and finish far quicker. Files are read straight from your device into memory and the result is handed back as a download, so no photo is ever transmitted to a server. Two consequences are worth stating plainly because they surprise people. First, the output is almost always bigger than the input — usually two to three times — since JPG simply cannot match HEVC's efficiency. That is not a bug and not a sign of a bad conversion. Second, the extras HEIC can carry do not survive: an alpha channel is flattened when the target is JPG, a Live Photo's motion is discarded and only the still key frame is kept, and depth-map data used for Portrait mode blur is dropped. If you need transparency preserved, choose PNG or WebP as the target instead of JPG. The tool identifies files by inspecting the ISO container's brand bytes rather than trusting the file extension or the MIME type your operating system reports, both of which are unreliable for HEIC.