Repair a Damaged PDF Online

When a download cuts off or a generator writes bad data, a PDF may refuse to open or show garbled text. The Repair PDF tool reconstructs page structure and restores missing fonts directly in your browser. It can recover unreadable PDFs and fix broken fonts without uploading your file.

Step-by-step: Repair a damaged PDF file online

1. Open the Repair PDF tool.
2. Click Select PDF and choose the corrupted document.
3. The tool scans for broken cross-reference tables, rebuilds object structure, and re-embeds fonts.
4. Preview the fixed file and press Repair PDF.
5. Download the restored document.

After repairing, you can merge the fixed PDF with other files or split it into separate pages for further editing.

Troubleshooting and limitations

• If the repair fails, verify the file fully downloaded; partial files cannot be reconstructed.
• Password-protected or encrypted PDFs must be unlocked before repair.
• Some fonts may be replaced with lookalikes if the originals are missing or proprietary.
• Interactive forms and digital signatures might be removed during rebuilding.

For more PDF help, see our complete toolkit guide or try the Split PDF tool to manage pages.

FAQ

Can every PDF be repaired?

No, severely truncated or encrypted files may be beyond recovery.

Will fonts look the same after repair?

The tool re-embeds missing fonts where possible, otherwise substitutes close matches.

What if the PDF is still corrupted after repair?

Run the tool again or source a new copy; some files are too damaged to fix.

Can I repair a PDF on my phone?

Yes, open the Repair PDF tool on mobile and follow the same steps to restore the file.

Is pdfjuggler secure?

Yes, processing happens locally in your browser so files never leave your device.

Can I use this offline?

Yes, once loaded, the tool works even without an internet connection.