# File Types
Docufree uses a whitelist-based approach to store and act on file. Each file type (by extension) can be configured to be
- Uploaded - whether file can be uploaded to Docufree.
- Viewed - whether the viewer will attempt to display the file.
- OCRed - whether OCR process will attempt to perform OCR on the file.
- Render - whether the render process will attempt to generate image-based views of the file.
With this tool you can add or toggle the flags of each file type as seen below:
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