What repair engines does this tool use?

The tool utilizes qpdf for rebuilding object tables, pdf-lib for structural rewrites, and Ghostscript as a fallback engine for severely damaged files.

Can I see what was fixed in my PDF?

Yes, the tool provides a detailed repair log and a before-and-after comparison showing changes in file size, page count, object count, and MD5 hashes.

What is the maximum file size supported for repair?

You can upload and repair PDF files up to 500 MB in size.

How does the tool calculate the health score?

The health score (0-100) is calculated based on header validation, page structure verification, XRef table integrity, and EOF marker presence.

Does this tool support repairing encrypted or password-protected PDFs?

The tool detects encryption during diagnostics, but encrypted files cannot be structurally rebuilt without the correct decryption credentials.

Elysia Tools

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PDF Tools

PDF Repair Enhanced

Advanced PDF repair with detailed diagnostics, before/after comparison, and repair logging

Details

What this tool helps you do

Enhanced PDF repair tool with comprehensive diagnostics and reporting.

Features:

Detailed diagnostic report showing file health score and specific issues
Before/after comparison (MD5, size, page count, object count)
Complete repair log with timestamp and method used
Multiple repair engines (qpdf, pdf-lib, Ghostscript)

Diagnostic Categories:

Header validation and version detection
Page count and structure verification
XRef and trailer integrity check
EOF marker validation
Encryption detection
Overall health score (0-100)

Repair Strategies:

Header normalization (recover misplaced or missing %PDF- header)
qpdf rebuild (object table and xref reconstruction)
pdf-lib rewrite fallback for mildly damaged structure
Ghostscript rewrite fallback

Execution

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Result

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Run the tool to preview files, text, structured data, or streamed output here.

Samples

PDF Repair Enhanced

What this tool helps you do

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Inputs

Result

Examples that match this tool

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Prepared example runs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Recovering a Corrupted Business Report

2. Fixing Misplaced PDF Headers

FAQ

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