About CR2 (Canon RAW v2)
CR2 is the RAW format Canon used in its EOS cameras from roughly 2004 to 2018 — DSLRs like the 5D series, the 7D, the 80D, and the Rebel line all produce it. The format is built on the TIFF container and stores the sensor's raw readout at 12 or 14 bits per channel, before white balance, sharpening, or color processing gets baked in.
That unprocessed data is the whole point: a CR2 gives you enormous flexibility when editing exposure and color. It is also why the files are big and why almost nothing outside of photo software can open them. If you need to email a shot, post it, or view it on a device without RAW support, you convert it first.
This site converts CR2 to standard formats in your browser — nothing is uploaded, and it is free. It does not write CR2, since only a Canon sensor can genuinely produce one. Conversion uses a neutral rendering, so the output may look flatter or slightly different in color than what Canon's own software would give you.
Strengths
- Lossless — nothing the sensor captured is thrown away
- Full 12- or 14-bit data with far more editing headroom than JPEG
- Extensively supported by photo editors and RAW processors after two decades in circulation
Limitations
- Large files — often 20-40 MB per shot from later cameras
- Cannot be displayed by most browsers, phones, or messaging apps without conversion
- Convert-from only: this site reads CR2 but cannot create it
- The neutral rendering here may not match the colors Canon's Digital Photo Professional produces
What those extra bits actually buy you
A JPEG stores 8 bits per colour channel — 256 brightness levels. A CR2 stores 12 or 14, which is 4,096 or 16,384 levels. That difference sounds abstract until you try to rescue a photo. Recovering detail from a bright sky in a JPEG usually produces flat grey mush, because the highlight information was compressed into a handful of values at capture time and there is nothing left to pull back. The same recovery from a CR2 often brings back cloud structure you could not see at all, because those levels were recorded and simply were not being displayed.
The same applies to white balance. A CR2 stores the white balance as a metadata note rather than applying it, so changing it later is free and lossless — exactly as if you had set it correctly in the camera. In a JPEG the white balance was baked into the pixels, and correcting a heavy colour cast means stretching channels that have already been quantised, which introduces banding and colour noise.
A TIFF in disguise, and what that means for compatibility
CR2 is structurally a TIFF file with Canon-specific tags — which is why a curious file utility may identify a .CR2 as TIFF data. It typically contains several images at once: the full-resolution sensor data, a smaller embedded JPEG preview, and a thumbnail. That embedded preview is what your camera shows you on its screen and what file browsers display, which is why a CR2 can look perfectly processed in a folder listing and then open flat in a RAW editor.
Being TIFF-based did not make CR2 universally readable, because the sensor data layout is Canon’s own and changed between camera models. Support in third-party software came model by model, sometimes months after a body shipped. Two decades on that is a solved problem for CR2 specifically — nearly every RAW processor handles the whole range — which is one practical advantage it has over its newer replacement, CR3.
Frequently asked questions
- What is the difference between CR2 and CR3?
- CR3 replaced CR2 in Canon cameras from 2018 onward. It uses a modern ISO base media container instead of TIFF, adds the optional C-RAW compressed mode that roughly halves file size, and carries richer metadata. CR2 has the compatibility advantage: after twenty years in circulation, essentially every photo tool reads it, while some older software still cannot open CR3.
- Why is my converted CR2 less vivid than the camera preview?
- The preview on your camera screen is a processed JPEG embedded inside the CR2, with Canon’s colour science, contrast, and sharpening already applied. The RAW data underneath is deliberately neutral. Conversion here renders that actual sensor data rather than extracting the preview, so the result is a flatter starting point — normal for RAW, and the reason RAW is worth shooting.
- Can I convert a JPEG back into a CR2?
- No. A CR2 holds unprocessed readings from a specific Canon sensor, including data that was discarded when the JPEG was created. There is no way to reconstruct it, and no tool that claims otherwise is doing what it says.
- Which Canon cameras produce CR2 files?
- Broadly, EOS bodies from around 2004 to 2018 — the 5D series through the 5D Mark IV, the 7D and 7D Mark II, the 6D, the 80D and earlier double-digit bodies, and the Rebel/xxxD line of that era. Cameras from 2018 onward, particularly the EOS R mirrorless range, produce CR3 instead.