Convert HEIC to PNG
A lossless PNG copy of every iPhone photo, made on your device.
- Nothing is uploaded
- Works offline after first visit
- Open source
- No watermark · limit is your device’s memory; phones hold less
Convert iPhone HEIC photos to lossless PNG in your browser. It is free, needs no account and adds no watermark, and your files are not uploaded: everything runs in your browser on your device. The size limit is your device’s memory, and phones hold less; give the page a short while after one visit to save itself for offline use, and then it works offline.
Done
Free, no ads. Support StayPut
Open the network tab. Your files never appear in it.
Add files and run the tool to see every request this tab makes.
Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.
HEIC is the format iPhones and iPads have used since iOS 11. It packs a photo into about half the space of a JPG, but a lot of software still refuses to open it. If a smaller JPG will do, use the HEIC to JPG converter. For a file that ends in .heif rather than .heic, the HEIF to PNG converter is the page written for it. PNG is the safe choice when you need the picture to open everywhere and you do not want a second round of lossy compression, for example when the photo is going into a design tool, a document, or an archive.
The decoder is libheif compiled to WebAssembly, running inside this tab. Your photo is decoded to pixels in memory and the browser writes the PNG. Expect the PNG to be much larger than the HEIC, often five to ten times, because PNG stores every pixel without loss.
Have another type of picture? Convert any image to PNG takes PNG, WebP, HEIC, GIF, BMP, AVIF and more.
How it works
- Drop your HEIC files onto the page, or tap to pick them. Batches are fine.
- There are no quality settings: PNG is lossless, so the output matches the decoded image exactly.
- Download each PNG, or all of them as one zip.
In your browser, not on a server
Stayput first reads the opening bytes of each file, where every image format writes its signature, so it knows what the file really is whatever it is called. Your browser decodes JPG, PNG, WebP, GIF, BMP, AVIF and SVG itself; TIFF goes through UTIF.js, HEIC through the libheif WebAssembly decoder, and JPEG XL (or AVIF, in a browser without native support) through the Squoosh decoders, all served from this site and cached. The browser re-encodes JPG, PNG and WebP; PDF, ICO, GIF, BMP and TIFF files are written by small encoders in the page. Nothing here needs a server.
Compared with upload-based tools: Online converters upload your image, convert it on their machine, keep it for hours and cap you at a few files a day. This does the same conversion on your device, for as many files as your device’s memory can hold, with no upload to wait for.
Verify it yourself. Give the page a short while after one visit to save itself for offline use, then turn off Wi-Fi or switch to airplane mode and run the tool again. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.
Questions
Why is the PNG so much bigger than the HEIC?
HEIC uses lossy video-style compression; PNG is lossless. A 2 MB HEIC from a 12-megapixel camera typically becomes a 15 to 25 MB PNG. If size matters more than a lossless copy, use the HEIC to JPG tool instead.
Does the PNG keep the photo’s date and location?
No. PNG has no standard place for camera EXIF data, and browsers do not write it. If you need the metadata, convert to JPG and tick "Keep EXIF metadata".
Are my photos uploaded?
No. There is no server in this process at all. After one visit and a short wait you can switch your device to airplane mode and convert.
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