HEIC to PNG Converter
Convert HEIC (High Efficiency Image Container, 2015) to PNG (Portable Network Graphics, 1996) entirely in your browser. Output files are substantially larger — often 900% bigger because the target format is less efficient for ordinary photographs. Files never leave the tab — there is no upload.
Which formats are supported?
Inputs: PNG, JPEG, WEBP, AVIF, GIF, BMP, ICO, TIFF (Safari) and HEIC/HEIF (via libheif WASM, loaded on demand). Outputs: PNG, JPEG, WEBP, AVIF — each with an optional WASM encoder variant in the dropdown (mozjpeg, oxipng, libwebp, libavif) for tighter compression or consistent output across browsers. Vendor camera RAW formats (CR2/CR3/NEF/ARW/DNG/...), PSD, EPS, TGA, XCF and ICNS are still rejected — those need format-specific decoders we haven't shipped yet.
HEIC is already lossy: the JPEG-style compression artefacts are baked into the pixel values you started with. Re-encoding to PNG preserves those artefacts faithfully — it cannot recover detail that HEIC discarded. That's why the resulting PNG file is usually larger: PNG is lossless and must store every artefact it sees.
Both formats support a true alpha channel — anti-aliased logos, drop shadows and translucent overlays survive the round-trip unchanged.
PNG is the natural choice for Logos, icons, UI screenshots, text, Anything with sharp edges or flat colour, and Images that need a true alpha channel. It is a poor fit for Photographs (will be much larger than JPG/WEBP/AVIF) and Animated content. Every browser since IE 7; every modern OS.
HEIC: what it is
HEIC is an Apple-branded HEIF container holding an HEVC video frame. It is what an iPhone takes by default since 2017 — and what most non-Apple software still refuses to open.
We decode HEIC entirely in the browser via libheif compiled to WebAssembly. The decoder is around 1.5 MB and downloads on demand the first time you drop a HEIC file; every later HEIC in the same session is instant.
PNG: what it is
PNG uses DEFLATE (the gzip algorithm) over filtered scanlines. It is lossless: a PNG round-trip never changes a pixel.
Encoding cost lives almost entirely in choosing per-row filters. The oxipng encoder we ship trials more filter combinations than canvas does and typically shrinks files 10–25% further.
At a glance
- Typical size change
- ~900% larger
- Transparency preserved
- Yes — both formats support alpha channels
- Compression
- HEIC (lossy) → PNG ( lossless)
- PNG browser support
- Every browser since IE 7; every modern OS.
Frequently asked questions
Is the converted PNG smaller than the original HEIC?
On a typical photograph, substantially larger — often 900% bigger because the target format is less efficient. Synthetic graphics (logos, screenshots) may behave very differently — try a single file first if size matters.
Will my HEIC be uploaded to convert it?
No. The conversion runs inside the browser tab using WebAssembly. Your file is never sent over the network — drop it, convert it, download it, all on your machine.
Will the PNG look better than the HEIC?
No — PNG is lossless, so it stores exactly what was in the HEIC, including any compression artefacts. You cannot undo JPEG-style loss by re-encoding. To improve quality, you need the original uncompressed source.