Repair PDF Files Online

Attempt recovery of readable pages from mildly damaged PDFs locally.

  1. 1Select files
  2. 2Adjust & process
  3. 3Download

1. Select Corrupted or Damaged PDF

Step 1

Or paste files with Ctrl+V / ⌘V

PDF

One PDF · 50 MiB · 200 pages · 100% Client-side

2. Document Diagnostics & Repair

Step 2

Drop a damaged PDF file above to analyze and repair.

Select a damaged or corrupt PDF to begin.

Diagnostic Recovery Report

Structural Inspection

What this repair engine fixes:

✓
Corrupt Cross-Reference (XRef) Tables:Rebuilds damaged byte offset tables so PDF readers can locate and render pages.
✓
Prepended Network Headers & HTML:Strips junk bytes and server wrappers accidentally saved before the %PDF- signature.
✓
Truncated EOF & Trailing Junk:Restores missing %%EOF trailer markers and eliminates trailing corrupted payloads.
✓
Broken Catalogs & Object Trees:Extracts salvageable page object trees into a brand-new, clean, standards-compliant PDF container.

How to use this tool & FAQs

Click any question below to expand its guide and answer

Expandable FAQs

Attempt recovery of readable PDF pages after minor header or trailer corruption. Recovery is not guaranteed; encrypted, signed and interactive-form documents are unsupported.

Recovery limits

Recovery is best effort for readable page objects and minor header or trailer corruption. Missing page data cannot be recreated. Encrypted, signed and interactive-form PDFs are rejected. Rebuilding pages can omit bookmarks, document metadata and accessibility tags; inspect the downloaded copy and keep your original.

How to repair corrupted PDF files online for free

1. Drop your broken, damaged, or unopenable PDF into the dropzone above.
2. Click Repair PDF. The tool analyzes the raw byte stream, cleans transport corruption, resolves invalid object pointers, and reconstructs the cross-reference tables.
3. Review the diagnostic report showing recovered pages and file size, then click Download Repaired PDF.

Why do PDF files get corrupted?

PDF files often become unreadable due to interrupted downloads, proxy servers prepending HTML errors, storage drive bad sectors, or improper email attachments. Traditional PDF viewers fail completely when the trailer or cross-reference table is off by even a few bytes.

Is my document safe and private?

Unlike cloud PDF repair tools (such as iLovePDF) that upload your confidential contracts and invoices to remote servers, Millebits repairs PDFs 100% inside your browser using WebAssembly. Your files never touch any external server.

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