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Supports: ARW
ARW is Sony's Alpha RAW format: the unprocessed sensor readout from your α, RX, or Cyber-shot camera. HEIC is a compact, high-quality still that holds roughly half the size of an equivalent JPEG. Converting renders the RAW into a finished HEIC — great if you live in the Apple ecosystem and want small, sharp files, but worth a second thought because HEIC opens natively almost only on Apple devices. If you need a photo that opens everywhere, convert ARW to JPG instead.
| Property | ARW (Sony Alpha RAW) | HEIC (HEIF still) |
|---|---|---|
| What it is | Unprocessed RAW sensor data | Rendered, compressed final image |
| Underlying standard | TIFF/EP-based, Sony extensions | ISO/IEC 23008-12, HEVC (H.265) codec |
| First appeared | 2006 (Sony DSLR-A100) | 2015; iPhone default since iOS 11 (2017) |
| Bit depth | 12 or 14-bit sensor data | 8 or 10-bit output |
| Editing latitude | Full — white balance, exposure recoverable | Baked in at conversion; little latitude left |
| Typical file size | ~20-40 MB | A few MB; about half an equivalent JPEG |
| Transparency / HDR | N/A (capture data) | Alpha plane + HDR supported |
| Opens natively in | Sony software, Lightroom, Camera Raw | Safari 17+, iOS, macOS; not Chrome/Firefox/Edge |
You lose editing latitude, not necessarily visible quality. Rendering a RAW bakes in white balance and exposure, so you can no longer recover highlights or re-grade the way you could in the ARW. The HEIC itself is a lossy image, but at the "Very High" preset it holds fine detail well. Keep your original ARW if you may want to re-edit later.
HEIC has narrow native support. Per caniuse, Safari 17 and later, iOS, and macOS open it natively, while Chrome, Firefox, Edge, and Chrome for Android do not. On Windows you can install the HEIF/HEVC extensions, but if you need a file that just works everywhere, convert to ARW to JPG instead.
Roughly half. The HEIF specification notes that JPEG needs about 139% higher bitrate — about 2.39 times the file size — to match HEVC at the same objective quality, which is why HEIC files land near half the size of an equivalent JPEG.
Partly. ARW stores 12 or 14-bit sensor data with wide dynamic range; HEIC outputs 8 or 10-bit. A 10-bit HEIC preserves smoother tonal gradients than 8-bit JPEG and can carry HDR metadata, but it cannot retain the full recoverable range of the original RAW once the conversion bakes the look in.
Yes, the HEIF container supports an alpha plane, so transparency can be stored. In practice, though, far fewer apps read HEIC alpha than read PNG transparency, so if a clean transparent image is the goal, convert ARW to PNG for broader support.
The real limit is upload size and time rather than your device. Sony ARW files commonly run 20-40 MB depending on camera resolution, which uploads quickly on a normal connection. Very large batches simply take longer to transfer before processing begins.
Yes. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. In our testing, a typical 24-megapixel ARW rendered to a single multi-megabyte HEIC at the "Very High" preset, a small fraction of the original RAW size.