PDF Repair Tool | Client-side PDF Utility

PDF Repair Tool

A fully client-side PDF utility for repairing corrupted, damaged, or problematic PDF files

No data leaves your browser - Complete privacy guaranteed

Project Overview

This project is a fully client-side PDF repair web application built using HTML5, CSS3, and Vanilla JavaScript with PDF.js integration. It allows users to repair corrupted, damaged, or problematic PDF files directly in their browser without uploading files to any server.

Corrupted Files

Repair PDFs with corrupted data structures, invalid headers, or missing objects.

Font Issues

Fix missing or incorrect font embeddings that cause rendering problems.

Image Problems

Repair corrupted image data, incorrect color spaces, or broken image streams.

Broken Links

Fix broken internal links, bookmarks, and navigation elements.

Upload PDF File

Drag & drop your PDF file here or click to browse

Supports files up to 100MB

File Name No file selected

File Size -

File Status Waiting for upload

Last Modified -

Repair Options

Quick Repair

Automatically fix common issues like corrupted headers and missing objects.

Advanced Repair

Deep scan and repair of complex issues including font and image problems.

Slower but more thorough

Custom Repair

Select specific issues to repair. Gives you full control over the process.

For experienced users

Advanced Repair Settings

Fix corrupted headers Rebuild cross-reference table Repair font embeddings

Optimize and repair images Fix broken internal links Clean corrupted metadata

Repairing PDF File

Analyzing PDF structure

Identifying issues

Repairing problems

Validating repair

PDF Diagnostics Report

0 issues found

Repair Complete!

Your PDF has been successfully repaired and is now ready for use.

Issues Fixed

Repair Time

File Improvement

Technical Implementation

This application uses PDF.js for parsing and analyzing PDF files, and jsPDF for generating repaired versions. The repair process includes:

PDF Structure Analysis: Parses PDF objects and validates the document structure
Error Detection: Identifies corrupted objects, missing references, and invalid data
Automated Repair: Rebuilds damaged sections while preserving original content
Validation: Ensures the repaired PDF conforms to PDF standards

All processing occurs in your browser using Web Workers to prevent UI blocking. No data is sent to external servers.

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