HEIC Converter

How it actually works

It converts Apple HEIC and HEIF photos into JPG or PNG entirely in the browser. When you add files, each is read as a Blob and handed to the heic2any library, which is the libheif image parser with a libde265 HEVC decoder compiled to WebAssembly, so decoding does not depend on the operating system shipping HEVC. The decoded image is re-encoded through the browser canvas to the format you pick, either image/jpeg or image/png, and the JPG quality slider maps directly onto that canvas encoder quality while PNG output is written lossless.

Files are accepted by their .heic or .heif extension or by their MIME type, a batch is processed one image at a time through a promise queue so memory does not spike, and each finished result is offered for individual download or packed into a single archive with JSZip and FileSaver. A converted thumbnail appears only after its own decode succeeds, so any failure stays visible per file instead of breaking the whole run.

Nothing is uploaded: the decode and re-encode happen inside the page on your device, and the only network dependency is the one-time load of the heic2any, JSZip and FileSaver scripts from a CDN.

What that means for your results

The decode is a genuine HEIF and HEVC decode rather than a filename rename, so images a plain browser viewer cannot open still convert on any operating system, and the output comes from the browser native canvas encoder, the same encoder used across the other image tools. Because the steps are deterministic, the same file at the same quality setting converts identically every time, and JPG at the default high setting keeps detail that is visually indistinguishable for sharing and printing.

Where it falls short — honestly

It converts from HEIC, not to it, so there is no way to produce a smaller HEIC file here. Decoding runs through WebAssembly in your tab and is CPU and memory heavy, so very large images or many files at once are handled sequentially and can be slow, and a rare or exotic HEIF variant that libheif cannot read simply fails for that file with nothing to repair. The JPG path offers a quality control but not finer options such as chroma subsampling, re-encoding through the canvas drops most embedded metadata including GPS, and because the libraries load from a CDN the page needs a connection the first time it is opened.

A real end-to-end workflow

Drop in one or many HEIC or HEIF files, choose JPG for the smallest and most compatible result or PNG for a lossless copy to edit further, then run Convert All and download each image or the whole batch as a ZIP. To shrink the converted JPGs for email use Image Compressor, and to hit an exact pixel size for a portal use Image Resizer; keep the originals if you later want to re-encode at a different quality.