PDF Repair & Optimizer

Repair a corrupted PDF without logging in. No account, no cloud. Upload the broken file locally and attempt recovery instantly.

Drag & Drop PDF File Here

or

No file selected.
Repair Options
Share this Tool

Spread the word to help others work faster!

Related Tools

Add Page Numbers to PDF

Add page numbers to your PDF documents. Instant browser access with no account setup.

Add Watermark to PDF

Stamp text or image watermarks onto PDF pages. Instant browser access with no account setup.

CSV to PDF

Convert CSV spreadsheet data to a PDF document. Instant browser access with no account setup.

Compress PDF

Reduce PDF file size without quality loss. Instant browser access with no account setup.

DWG to PDF

Convert AutoCAD DWG files to PDF documents. Instant browser access with no account setup.

Delete PDF Pages

Remove unwanted pages from your PDF files. Instant browser access with no account setup.

EPUB to PDF

Convert EPUB e-books to PDF documents. Instant browser access with no account setup.

Excel to PDF

Convert Excel spreadsheets to PDF format. Instant browser access with no account setup.
Step-by-Step Guide

Repair PDF

Reconstruct corrupted file streams, rebuild cross-reference tables, fix file headers, and recover damaged document contents instantly.

1
Select Corrupted PDF

Choose or drag-and-drop the damaged, unopenable, or corrupted PDF document from your local storage.

Damaged Document Binary Stream Read
2
Scan Internal Structure

The analyzer performs diagnostics on cross-reference (xref) offsets, trailer integrity, and font object tables.

Structure Analysis Xref Offset Repair Stream Decompression
3
Recompile Binary Data

Click Repair. The engine rebuilds file indexing, maps broken structures, and recovers salvageable page streams.

Header Correction Object Table Rebuild Content Salvaging
4
Export Repaired PDF

Download the recovered, standards-compliant PDF file, ready to open in any default viewer.

Recovered Export Offline Security
Client-side processing
Auto-deleted after session
Zero server uploads
PDF Repair Tool

Advanced recovery engine for corrupted PDF documents

Diagnose and fix structural issues, missing trailers, and invalid xref tables completely in your web browser.

Xref Table Reconstruction

Detects invalid cross-reference byte offsets and recalculates structural pointer grids to make pages accessible.

Header & Trailer Restoration

Appends or corrects missing '%PDF-' magic headers and standard trailer dictionaries to pass system validation.

Deflate Stream Repair

Bypasses corrupted blocks in compressed page streams to extract and display clean visual assets and layouts.

Browser Sandboxing

Runs parsing logic entirely within your browser memory so that your private documents are never sent over the web.

Repair invalid headers, tables, and offset markers
Reconstruct compliance structures for standard readers
100% offline recovery guarantees document confidentiality
FAQ

Common Questions

Frequently asked questions regarding file corruption, recovery success rates, and privacy.

What causes PDF files to become corrupted?
PDF corruption typically occurs due to interrupted downloads, network errors during transfers, incomplete saving, disk failures, or software crashes during file generation.
Can this tool recover 100% of a severely damaged PDF?
Recovery success depends on the damage. If only indexing (xref tables) or headers are broken, 100% recovery is typical. If binary page content stream blocks are overwritten or completely missing, those parts cannot be salvaged.
How long does the repair process take?
Most documents are processed in seconds. For extremely large files (e.g., hundreds of pages), the structural scan may take up to a minute depending on your processor.
Are my private or sensitive files uploaded to your servers?
No. All analysis, debugging, and file recompilation are executed client-side using JavaScript/WebAssembly in your local browser window. No data is sent to external servers.
Why does a repaired file sometimes have empty pages?
If specific page streams or objects are completely unreadable or destroyed, the recovery engine fills those offsets with blank structural templates to ensure the rest of the document remains readable.