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Supported File Sources

The API supports TLS 1.2 and 1.3 for secure connections. Earlier versions such as TLS 1.0 and 1.1 are deprecated and should be avoided.
Tip: For re-usable files (e.g., PDF templates), use cache: before the URL
(e.g., cache:https://example.com/file1.pdf) to reduce repeated downloads and avoid
errors like Access Denied or Too Many Requests. It stores a local copy of the file after the first download, so it does not need to be fetched again from the original server.
The PDF.co API supports publicly accessible links from any source, including Google Drive, Dropbox, and PDF.co Built-In Files Storage. File inputs are accepted only via URLs and not through direct uploads. If your file is stored locally or not publicly accessible, you must upload it using the File Upload endpoints to get a publicly accessible URL. For data security, you have the option to encrypt output files and decrypt input files. Learn more about user-controlled data encryption.

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PDF.co Request size

API requests do not support request sizes of more than 4 megabytes in size. Please ensure that request sizes do not exceed this limit.