PDF upload limits and error messages

2026/07/22 更新

PDFs can be up to 100 pages and 50 MB. Checks run after upload, so an error can appear a moment later.

What each error means

  • File too large: over 50 MB. Compress the PDF or split it into parts.
  • Too many pages: over 100 pages. Split the document and process it in parts.
  • Corrupt or unsupported file: the file does not open as a valid PDF. Re-export it from the source application.
  • Cannot open the file: usually password protection. Remove the password, save, and upload again.
  • Detection failed: a processing error on our side. Retry once; if it persists, contact support with the file name.
  • Export failed: the redaction render did not finish. Retry the export; contact support if it keeps failing.

Scanned document notice

A scan notice is not an error; it means OCR ran. See the scanned PDFs article for details.

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