Convert Canon CRW to HEIC Online

CRW is Canon's original RAW format, used from 1997 through 2004 on bodies including the D30, D60, 10D, 300D Digital Rebel, EOS-1D, EOS-1Ds, and the PowerShot Pro 1, Pro 70, and G-series compacts up to the G6. Photographers digitizing old hard drives, estate executors recovering a deceased relative's archive, and museum collections cataloging early-digital photojournalism convert CRW to HEIC to produce a modern, space-efficient viewing archive: HEIC is readable by every current Apple device and stores the same image at roughly half the size of JPG.

Canon dropped CRW for the TIFF-based CR2 with the EOS-1D Mark II in 2004, so any CRW file is at least two decades old. The format is a 12-bit Canon-proprietary container (CIFF-based) holding sensor data from 3MP to 11MP depending on body - tiny by modern standards. A 6MP 10D CRW is roughly 8MB; converted to high-quality HEIC it lands around 1-1.5MB, small enough that an entire early-2000s career archive fits comfortably in an iCloud or Google Photos library (both services accept and index HEIC natively) with face recognition and date search working across it.

The metadata is often the value in these archives - a 2003 press-pool CRW is small but historically rich. CRW to HEIC batch conversion preserves the EXIF timestamp, shutter, lens, and ISO so files remain searchable after conversion. Two caveats for archivists: HEIC is a lossy derivative, so keep the CRW originals (or DNG conversions) as preservation masters, and institutions distributing to Windows-heavy user bases should remember those machines need the HEVC codec - our HEIC to JPG tool covers that gap on demand.

CRW (Canon Raw) shipped on the Canon PowerShot Pro70 in 1998 and matured on the D30, Canon's first self-developed DSLR, in 2000. The format uses Canon's CIFF (Camera Image File Format) container rather than the TIFF base most other RAWs adopt, making CRW a slight historical outlier. Canon retired CRW with the EOS-1D Mark II and EOS 20D in 2004, replacing it with CR2. Today CRW survives only in archives shot on the D30, D60, 10D, 300D, and various PowerShot G-series bodies — files that are still readable by Adobe products and legacy Canon DPP versions.

RAW files are the unprocessed sensor output of a digital camera - 20 to 100 MB each, unviewable without specialist software. Converting RAW to HEIC develops the file into a finished, viewable photo at a small fraction of the size, with automatic white balance and tone mapping applied. Compared with the traditional RAW-to-JPG step, HEIC output is roughly half the size again and supports 10-bit colour, preserving more of the tonal depth the RAW capture contains.

Photographers working in the Apple ecosystem use RAW-to-HEIC to build lightweight browsing libraries: the HEIC versions live in Apple Photos and sync through iCloud for review and sharing, while the RAW masters stay on an external archive. A season of shoots that would occupy hundreds of gigabytes as RAW previews fits comfortably in iCloud as HEIC.

Keep the RAW originals - They remain the editable master with full recovery latitude. And when delivering to clients or platforms whose HEIC support is unknown, convert to JPG instead; HEIC is the right choice for storage and Apple-native workflows, JPG for universal delivery.