PDF Tools

Repair PDF

Loads a PDF with the pdf-lib library and saves it again as a fresh file named repaired.pdf. This rebuilds the file structure and often fixes minor damage such as a bad cross-reference table, but it cannot recover content that is truly missing.

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Up to 1 files

This will attempt to fix:

  • Corrupted PDF structure
  • Missing or invalid objects
  • Broken cross-reference table
  • Invalid stream data

Works by loading and re-saving the PDF with pdf-lib, which often repairs common issues.

How to Use

  1. 1Drop one PDF onto the upload area or choose it from your device.
  2. 2Click the Repair PDF button and wait for the Repairing PDF progress message to finish.
  3. 3Download the result, which is named repaired.pdf.
  4. 4Open the new file and check every page. If it still will not open, the damage is beyond what this tool can fix.

Features

  • Accepts one PDF per run (maxFiles is 1).
  • Repair method is a plain load and re-save with pdf-lib, which rebuilds the file's internal structure.
  • Can help with a broken cross-reference table or slightly malformed objects that pdf-lib is able to read.
  • Runs in your browser; the file is not uploaded.
  • Per-file size limit of 200 MB from the standard tool pipeline.
  • Output is a new PDF called repaired.pdf; your original file is untouched.

FAQ

What kind of PDF damage can this fix?

It opens the file with pdf-lib and writes it out again, so the internal object table and cross-reference data are regenerated. That can help when a viewer complains about a bad xref table or slightly malformed structure, provided pdf-lib can still parse the file.

What can it not fix?

It is not a data-recovery tool. If the file was truncated during download, if page content streams are corrupted, or if pdf-lib itself refuses to load the file, the tool will fail or produce the same broken result. It does not use an external repair engine such as qpdf, and it cannot bring back pages or images that are missing from the file.

Will the repaired PDF look identical to the original?

Usually the pages look the same, because content is carried over rather than redrawn. Because the file is rebuilt, always open repaired.pdf and scroll through it before you delete the original.

Is my PDF uploaded anywhere?

No. The load and re-save happen in your browser with pdf-lib and the file is not sent to a server.

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