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Repair PDF

Check a damaged PDF for the usual causes of failure, then rebuild it from whatever pages can still be read.

  • No training on your data
  • Region: global

Drop a broken PDF

Click, drag or paste — diagnosis and repair run on your device

PDF & DocumentsOptimise & Secure

Repair PDF — Overview

About this tool

What is Repair PDF?

Repair PDF diagnoses why a PDF will not open and then rebuilds whatever can still be read into a fresh, valid document.

It checks the specific things that actually break PDFs: a missing or offset `%PDF` header, a truncated file with no `%%EOF` marker, an unreadable cross-reference table and individual pages that fail to parse.

Two recovery routes are offered — a structural rebuild that copies surviving pages into a clean file, and an image salvage that re-renders anything the reader can still draw when the structure is beyond repair.

What it does

What does Repair PDF do?

A clear diagnosis before any repair attempt:

  • Header, end-marker and linearisation checks
  • Per-page parse test that names the unreadable pages
  • Encryption detection with a pointer to the Unlock tool
  • Structural rebuild that preserves selectable text
  • Image salvage mode as an explicit last resort
  • Honest reporting of how many pages were recovered
How to use

How to use Repair PDF

  1. 1
    Drop the broken PDF

    The file is inspected immediately and a diagnosis card lists what is wrong.

  2. 2
    Read the diagnosis

    See which pages survive, whether the file was truncated and whether encryption is blocking access.

  3. 3
    Rebuild or salvage

    Start with the structural rebuild. If it fails, salvage as images to at least save the visible content.

Good to know

Privacy & cost

This tool runs entirely in your browser. Nothing is uploaded, logged, or saved on our servers — safe for confidential or proprietary data.

Use cases & scenarios

Where it fits

Interrupted downloads

A file cut off mid-transfer usually loses its end marker. A rebuild recovers everything that arrived.

Failed exports

Documents produced by a crashing printer driver or export job often have a damaged page index that can be rewritten.

Recovering from old media

Files pulled off failing drives may lose scattered pages — recovering the rest still beats losing the document.

Value & benefits

Why people pick this tool

  • Free forever — no page caps, watermarks, sign-ups or premium tier
  • 100% in-browser processing — your documents never touch a server
  • Works offline once the page has loaded, ideal for confidential files
  • No queues or waiting rooms — the work happens at the speed of your device
Frequently asked questions

FAQs

Final thoughts

The bottom line

A corrupt PDF usually feels like total loss, when in fact most of the document is still sitting in the file. A diagnosis plus a rebuild recovers it in seconds — and without emailing a damaged, possibly sensitive file to a recovery service.

More in PDF & Documents

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