CR2 to ICO Converter
Convert CR2 to ICO online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
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Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is a CR2 file?
The CR2 (Canon Raw 2) format is a proprietary raw image file type developed by Canon Inc., introduced in 2004 with the EOS 20D to supersede the CRW format. Structured on the TIFF (Tag Image File Format) specification, it contains lossless compressed raw sensor data and proprietary binary tags known as 'MakerNotes' that record exposure settings, lens data, and white balance. The format writes data in Big-Endian byte order and was the standard for Canon DSLRs until the introduction of the CR3 format in 2018.
How to open a CR2 file
CR2 files require software capable of parsing Canon's specific sensor data. Canon provides the Digital Photo Professional (DPP) tool for native processing. Third-party support is extensive, with Adobe Photoshop (via Camera Raw), Lightroom, and Capture One being industry standards for decoding CR2. On the OS level, the Microsoft Camera Codec Pack enables viewing in Windows Explorer, while macOS supports CR2 files natively within the Finder and Preview apps via system-level raw engine updates.
CR2 Technical Info
- Full Name
- Canon Raw Version 2
- Developed By
- Canon Inc.
- Initial Release
- 2004
- MIME Type
- image/x-canon-cr2
What is an ICO file?
The ICO format is an image container specifically designed for Microsoft Windows to store icons for executable files, folders, and applications. Introduced with Windows 1.0, it can encapsulate multiple raster images of varying dimensions and color depths (specifically BMP or PNG frames) within a single file to support dynamic scaling across different display resolutions. The structure comprises an ICONDIR header referencing one or more ICONDIRENTRY directory entries, allowing the operating system to select the appropriate 16x16, 32x32, or 48x48 pixel resource based on the current UI scaling settings.
How to open an ICO file
ICO files are natively supported by the Microsoft Windows operating system, which automatically renders them in the File Explorer and taskbar. On macOS, Apple Preview handles the format natively. For editing or detailed inspection of the contained bitmap layers, raster graphics editors such as GIMP, Adobe Photoshop (via plugin), or Paint.NET are required. Web browsers also natively render ICO files when they are designated as favicons.
ICO Technical Info
- Full Name
- Microsoft Icon File
- Developed By
- Microsoft
- Initial Release
- 1985
- MIME Type
- image/vnd.microsoft.icon
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The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert CR2 to ICO in seconds
Every CR2 to ICO conversion runs on our servers, so your device stays fast and the output quality stays intact.
Fast, cloud-powered
No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
Secure & private
Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
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Developer API
Convert CR2 to ICO via API
Automate CR2 to ICO conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "cr2-to-ico",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "ico"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.cr2
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.