HEIC to GRAYA Converter
Processing entirely on your device — large files may take a moment.
HEIC (High Efficiency Image Container) is the default photo format of iPhones. It stores photos in roughly half the space of JPG, but many programs and older systems still cannot open it directly. Convert to GRAYA when a pipeline needs bare pixel bytes.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How to convert HEIC to GRAYA
- 1
Select your files
Drag & drop your HEIC files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to GRAYA". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted GRAYA file individually, or grab everything at once as a ZIP archive.
About the HEIC format
HEIC (High Efficiency Image Container) is the HEIF container carrying HEVC-compressed image data, and it has been the default photo format on iPhones since iOS 11. At equivalent quality it stores photos in roughly half the space of JPG, keeps 10-bit color and HDR information intact, and can hold multiple images — bursts,Live Photos pairs, even depth maps — in one file.
Its weakness is everything outside Apple's ecosystem. Windows needs an extension from the Store to preview it natively, many web services still reject the upload, and HEVC's patent licensing slowed hardware adoption on non-Apple devices. Android 9+ phones generally handle it, but the desktop web remained JPG territory for years.
+ Strengths
- ✓About half the size of JPG at the same quality
- ✓10-bit color and HDR survive the pipeline
- ✓One file can hold bursts, sequences and depth data
! Limitations
- −Windows and many web services need extras to open it
- −HEVC patent licensing complicated adoption outside Apple
- −Thumbnail and preview performance on old hardware is poor
About the GRAYA format
The Grayscale + Alpha (raw) coder of the ImageMagick set — the raw-pixels format is written natively by the magick.wasm engine, entirely in your browser.
Obscure coder formats like this are exactly what template-driven converters list and never actually convert — here it really works.
+ Strengths
- ✓Written natively by ImageMagick
- ✓Runs entirely in your browser
- ✓Free, private, no watermarks
! Limitations
- −Niche format — few modern readers
- −Feature subset varies by coder
- −Keep the original for re-editing
Why convert HEIC to GRAYA?
There is a concrete reason this conversion exists: Windows and many web services need extras to open it GRAYA sidesteps that — Written natively by ImageMagick If that is your situation, the tool above settles it in seconds, entirely on your device.
Frequently asked questions
Is this HEIC to GRAYA converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Will I lose quality converting HEIC to GRAYA?
No — GRAYA is a lossless format, so every pixel of the converted image matches your original HEIC file. You can also adjust the quality/size balance before converting when the target format supports compression.
Will transparent areas survive the conversion to GRAYA?
Transparency is kept whenever GRAYA actually supports an alpha channel. If the target format has none (like JPG), transparent areas are flattened onto a white background — that is a property of the format, not of this tool.
Can I convert several HEIC files at once?
Yes — drop as many files as you like into the tool and they are converted in one batch. When more than one file comes out, everything is bundled into a ZIP for a single download.