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CRW to DJVU Converter

CRW to DJVU — free online image-to-document conversion

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Reliable Engine

A proven conversion platform — Convertio processes millions of CRW and other image conversions daily, delivering dependable DJVU results.

Cross-Platform

Whether you are on a PC, Mac, Chromebook, or phone — the CRW to DJVU converter works the same way across all platforms and devices.

Process in Bulk

Upload multiple CRW files simultaneously and convert them all to DJVU in one batch — saving time when you have a whole folder to process.

How to convert CRW to DJVU

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose djvu or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your djvu file right afterwards

About formats

CRW is Canon's first-generation RAW image format, based on the Camera Image File Format (CIFF) specification developed jointly by Canon, Kodak, and other imaging companies in the late 1990s. Used by Canon's consumer and prosumer cameras from approximately 1998 through the early 2000s — including the PowerShot G-series, EOS D30, EOS D60, and EOS 10D — CRW files store the unprocessed 12-bit sensor readout in a heap-based container structure that differs fundamentally from the TIFF-derived approach used by most other camera manufacturers. The CIFF container organizes data into a hierarchical directory of heap entries, each identified by type and tag, containing the raw image data, JPEG thumbnail, EXIF information, and Canon's proprietary metadata including White Balance tables and Picture Style parameters. CRW was eventually replaced by the CR2 format starting with the EOS-1D Mark II in 2004, as Canon moved to a TIFF-based container that aligned more closely with industry conventions and supported higher bit depths. One advantage of CRW files is historical completeness: they preserve the full original sensor data from an important transitional period in digital photography, and the 12-bit captures from cameras like the EOS D30 still produce excellent results when reprocessed with modern RAW converters. Broad legacy support is another strength — despite its age, CRW remains readable by Adobe Lightroom, Photoshop, RawTherapee, and other modern converters, ensuring these early digital negatives remain accessible.
Developer: Canon
Initial release: 1998
DjVu (pronounced "deja vu") is a document format developed at AT&T Labs by Yann LeCun, Leon Bottou, Patrick Haffner, and Paul Howard, first released in 1996. The format was specifically designed for storing scanned documents and images at very high compression ratios while maintaining visual quality suitable for on-screen reading. DjVu achieves this through a layered approach: the document image is separated into a foreground layer (text and line art at full resolution), a background layer (photographs and textures at reduced resolution), and a mask layer that determines which layer is visible at each pixel. This separation, combined with purpose-built compression algorithms for each layer type, typically produces files 5-10 times smaller than equivalent JPEG or PDF scans. One advantage is exceptional compression on scanned pages — a 300 DPI color scan that might occupy 25 MB as TIFF or 500 KB as JPEG typically compresses to 40-80 KB in DjVu while preserving legible text. The progressive rendering model is another strength: DjVu files stream efficiently over networks, displaying a readable low-resolution version almost immediately while progressively refining to full quality. The format supports multi-page documents, embedded text layers for searchability, hyperlinks, annotations, and a shared dictionary mechanism that further compresses collections of similar pages. DjVu is widely used by libraries and archives for digitized historical documents and manuscripts.
Developer: AT&T Labs
Initial release: 1996

Frequently Asked Questions

What are the reasons to convert CRW to DJVU?

DJVU documents make it easy to organize and share Canon photos in a structured format — converting from CRW enables that without specialized image software.

What software can open DJVU?

You can open DJVU with DjVu viewer, WinDjView, Okular, Evince, and SumatraPDF.

Is my CRW file safe during conversion?

Convertio prioritizes privacy — your CRW file is deleted after conversion completes, and the DJVU result is automatically removed within 24 hours.

How fast is the CRW to DJVU conversion?

Speed depends on file size, but most CRW to DJVU conversions complete in under a minute. Server-side processing ensures quick turnaround.

Does converting CRW to DJVU affect quality?

The conversion preserves visual quality as closely as the target format allows. DJVU output maintains the essential detail from your original CRW image.