If your PDF file won't open in standard readers because of a 'Corrupt Header' or 'Does not begin with %PDF-' error, our binary repair tool can help. It scans the raw ArrayBuffer of your file to find the actual start of the PDF data and strips away leading garbage bytes, restoring access without requiring complex command-line hex editors.
Privacy Protected
Fix Corrupt PDF Headers Online
Low-level binary manipulation tools for PDF developers and technical forensics.
Share Tool
Select PDF Document
Privacy First • No Uploads • 100% Client-Side
Start Here
About Repair Corrupt PDF Header
1
Upload File
Select your broken PDF file.
2
Automatic Scan
Our engine will scan the binary array to find the valid header.
3
Download
Save the repaired, readable PDF to your device.
Key Features
Deep Byte Scan
Scans the first 2KB of the file to locate the true %PDF- magic number.
Zero Upload Security
All binary manipulation happens locally in your browser. Your sensitive documents never leave your device.
Instant Recovery
Trims malformed bytes and generates a clean, readable PDF file instantly.
Frequently Asked Questions
No. This tool specifically fixes 'Malformed Header' errors caused by bad downloads or system glitches appending bytes to the start of the file. It cannot recover heavily encoded or fully destroyed files.
Yes, complete 100% secure. The file is mapped directly to your computer's RAM, parsed, and downloaded without ever touching a server.
Related Tools
View allMerge PDF
Combine multiple PDFs into one unified document.
Split PDF
Split PDF into multiple files or extract pages.
Compress PDF
Reduce PDF file size while optimizing quality.
PDF to Image
Convert PDF pages to JPG or PNG images.
Lock PDF
Protect PDF with a password.
Unlock PDF
Remove password protection from PDF.
Last updated on