CRW to PDF Converter

Convert CRW to PDF: What This Tutorial Covers

CRW is Canon's first raw format — the files an EOS D30, D60, 10D or 300D, or a PowerShot G-series compact, wrote in the early 2000s — stored in the CIFF container whose specification Canon released on 12 February 1997. Modern viewers and PDF readers have no CIFF decoder, so a .crw sitting in a folder is effectively unopenable. This walk-through shows how to develop one into a PDF that opens anywhere, exactly what each page setting does, and what to do when an old raw refuses to render.

How to Convert CRW to PDF

1. Upload Your CRW Files: Drag your .crw files onto the page or click "Add Files". Add them in the order you want the pages to appear — upload order is page order when they are combined.
2. Choose Paper size, Page layout and Margin: Paper size starts on A4 and includes Letter, Legal, Tabloid, Ledger, Executive, A3, the ARCH and ISO B sizes, and "Original" (a page sized to the photo itself). Page layout starts on Portrait. Margin starts on Narrow (0.5").
3. Set Image placement, alignment and quality: Image placement starts on Contained, which fits the whole frame on the page; Cover fills the page and crops the overflow. Image alignment starts on Center. The Image Quality (%) slider starts at 75 and controls how hard the developed photo is compressed inside the document.
4. Pick a Combine mode, then Convert: Combine? starts on Single PDF, placing each photo on its own page of one document; Individual PDFs returns one file per photo. Click Convert and download. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours. No sign-up, no watermark.

Walk-through: Page Setup for an Old Canon Still

A CRW holds undeveloped sensor data, so before anything can be placed on a page the converter has to demosaic it into a finished picture. That developed image is what your page settings then shape — and because these cameras shot 3:2 frames at a few megapixels, the decisions are different from those for a modern high-resolution file.

• If you want the entire photo visible — proof sheets, archiving, anything someone will inspect — leave Image placement on Contained. The full frame is fitted inside the margins with nothing cropped, leaving white space where the 3:2 photo does not match the page proportions.
• If you want the photo to fill the page edge to edge, switch Image placement to Cover. Whatever does not fit the page shape is cropped away, which looks clean but is wrong for proofing.
• If the photo is landscape, set Page layout to Landscape, or pick Ledger (17 x 11 in), which is the only preset that is wider than it is tall by default.
• If you want the page to match the photograph exactly, choose Original as the Paper size and No margin (0"). The page is then built to the image's own dimensions, with no white border at all.
• If you are emailing the result, drop Image Quality (%) below its default of 75. If you are printing, push it toward 100 — with only a few megapixels to work with, an early Canon still has little detail to spare.
• If you have a batch of shots, keep Combine? on Single PDF: each developed photo lands on its own page, which is the simplest way to build a contact sheet of old captures.

Paper Size and Margin Reference

Every preset below is a fixed physical size, so the same photo lands at a different scale on each. "Original" is the exception — it sizes the page to the developed image instead.

What Ends Up Inside the PDF

Common Errors and How to Fix Them

• "My CRW will not preview anywhere." Expected — CIFF is a retired proprietary container that general viewers cannot decode. Converting it is the fix. Upload the original .crw, not a sidecar or a proxy file.
• "The photo in the PDF looks flatter than I remember." The raw latitude is developed in at conversion, so highlight recovery and white-balance shifts are no longer available. Develop the CRW in Canon's Digital Photo Professional, Lightroom or RawTherapee first if you want to control that interpretation.
• "The image is cropped." Image placement is on Cover. Switch it to Contained to keep the whole frame.
• "There is too much white space around the photo." A 3:2 photo cannot fill an A4 page without cropping. Either set Paper size to Original with No margin, or accept the border, or switch to Cover and lose the edges.
• "The PDF is too large to email." Lower Image Quality (%) from its default of 75. If it is still too big, check whether you meant Individual PDFs rather than one document holding every photo.
• "My raw came from modified firmware and renders oddly." Some early bodies running third-party firmware wrote files that deviate from the standard CIFF layout, so rendering can be imperfect. Use the original out-of-camera file if you still have it.

When This Doesn't Work

A handful of CRW files resist clean conversion — truncated or partially copied files from a failing card, or non-standard variants. If a page renders wrong, first try CRW to JPG or CRW to TIFF to establish whether the raw itself decodes before wrapping it in a document; TIFF gives you a lossless raster you can inspect properly. If even that fails, the source file is likely damaged, and your best route is Canon's Digital Photo Professional, which understands the original CIFF structure most thoroughly, to recover and export an image first. And if you are producing a document to be edited rather than read, note that a PDF page holding a photograph is a picture in a wrapper — for editing, a raster export is the better handoff.

Frequently Asked Questions

Why can't I just open my CRW file in a PDF reader or a modern photo app?

Because CRW is written in CIFF — the Camera Image File Format, a proprietary Canon raw container released on 12 February 1997 and retired after the EOS 10D and 300D era. General-purpose viewers, PDF readers and many current editors have no CIFF decoder, so the file registers as unsupported. Converting to PDF develops the raw into a standard picture and embeds it on a page, producing a document that opens in Acrobat Reader, Preview, Chrome, Firefox, Edge and Safari without any Canon software.

How is CRW different from CR2 and CR3?

All three are Canon raw, but they share almost nothing structurally. CRW uses CIFF, which records directory offsets relative to each data block rather than as absolute file positions. CR2, its replacement, is built on TIFF. CR3, introduced in 2018, uses an ISO base-media container with Canon's proprietary crx codec. That is why software that opens a CR2 without complaint may still reject a CRW — and why CRW is the least widely supported of the three today. For a newer Canon body, use CR3 to PDF instead.

Which Canon cameras produced CRW files?

CRW came from Canon's early digital bodies: the EOS D30, D60, 10D and 300D (Digital Rebel) DSLRs, plus the PowerShot Pro1, the G1 through G6 compacts and the S30 through S70. If your file came from anything newer it is almost certainly CR2 or CR3 rather than CRW.

Does converting CRW to PDF keep the raw editing latitude?

No. The raw is demosaiced and developed at conversion time, and that finished image is what goes into the document. Raw-only adjustments — recovering a blown highlight, a large white-balance shift, a push or pull of exposure — are committed and no longer available. CRW to PDF is for sharing, printing and archiving a readable copy; keep the original .crw if you might want to re-develop it later.

What is actually embedded in the PDF — the raw, or a picture?

A picture. The developed frame is compressed as a JPEG at the Image Quality (%) you choose and placed on the page, with its metadata headers stripped, so the PDF carries the photograph rather than the shot data. That is also why the Image Transparency control makes no difference on this page: it only switches the embedded encoding for PNG sources, and a Canon raw has no alpha channel to preserve.

Can I put several CRW photos into one PDF?

Yes, and it is the default. Upload as many .crw files as you like and leave Combine? on Single PDF — each developed photo lands on its own page, in upload order, sharing the same paper size, margin, placement and quality settings. That makes it a quick way to build a contact sheet from an old shoot. Choose Individual PDFs if you would rather have one document per photo.

How do I make the page match the photo exactly, with no white border?

Set Paper size to Original and Margin to No margin (0"). The page is then built to the developed image's own dimensions rather than a fixed physical size, and nothing is added around it. Leave Image placement on Contained so the frame is not cropped. Any of the fixed presets — A4, Letter and the rest — will leave a border, because a 3:2 photograph does not match their proportions.

What happens to my files after the conversion?

They are uploaded over an encrypted connection, developed and assembled into your document on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public. CRW files are modest by modern standards at a few megabytes each, so the practical constraint on a big contact sheet is upload size and time rather than anything in the PDF itself.