# Repair PDF

> Recover mildly corrupted PDFs locally by rebuilding their structure and validating the output before download.

Canonical: https://helpers.aibrush.co/en/repair-pdf

## Options

Output filename control.

Best-effort byte cleanup around the PDF header and EOF marker.

Cross-reference rebuild through a fresh PDF save.

Readable-output validation before download.

## How to repair a PDF

1. **Upload PDF** — Upload one damaged or suspicious PDF.
2. **Run repair** — Run the local repair attempt.
3. **Review notes** — Review the recovered page count, attempts, and repair notes.
4. **Download** — Download the rebuilt PDF if the output validates successfully.

## FAQ

### Are my PDFs uploaded?

No. Repair attempts run in your browser.

### Can every broken PDF be fixed?

No. If the browser cannot recover readable pages and validate the rebuilt output, the tool shows a plain failure message.

### Does repair change the document?

The visible pages are preserved where the parser can read them, but the file structure is rewritten to refresh cross-reference tables.