Extract text from COS files
To convert your COS file to another format, you need Capture One or other Settings software.
To convert other file formats to the "Image Processing Sidecar" file type, you need software like Capture One or a similar tool.
The .COS extension serves two primary, distinct ecosystems, creating frequent confusion for users trying to open them. Most commonly, a .COS file is a Capture One Settings sidecar file generated by Capture One photo editing software. These files contain XML-based instructions for image adjustments (like exposure, color grading, and cropping) applied to a RAW image.
The Problem: Users often mistake these for actual image files. However, they contain no pixel data, meaning they cannot be converted directly into a JPG or PNG. They are strictly metadata dependencies; deleting them removes your edits, but sending them alone is useless to the recipient without the source RAW file. The format creates folder clutter and is proprietary to the Capture One version used.
The Solution: To get a viewable image, you must open the original RAW file in Capture One and "Process" (export) it to JPG, TIFF, or PSD. For backup purposes, archiving the .COS with the RAW file is essential.
Alternatively, in the construction industry, .COS files are project archives used by Glodon cost estimation software. These are often ZIP-compressed containers holding project data.
The Problem: These require expensive, industry-specific licensing to open.
The Solution: For Glodon files, the best conversion path is exporting the data within the native software to XLSX (Excel) or PDF for universal viewing. Identify which type you have by dragging and dropping it here.
Convert.Guru analyzes your COS file, detects the exact format, and lets you read the text inside.
Users also converted ZCOS, COF, ZIP, PDF, EIP, IIQ, C1S, SIN, COT and SEC files.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our COS converter.