Are NanoTools completely free to use?

Yes, all basic tools on NanoTools are completely free to use with no registration required. We offer premium features for power users.

Is my data secure when using NanoTools?

Your files are processed securely and are automatically deleted after processing. We do not store your files or data on our servers.

No installation required. All tools work directly in your browser on any device - computer, tablet, or smartphone.

We support a wide range of formats including PDF, JPG, PNG, WebP, GIF, JSON, XML, CSV, and many more depending on the tool.

Repair corrupted PDF online for free. Fix damaged PDF files and recover content. Restore unreadable PDFs.

Drop corrupted PDF file here or click to browse

.pdf, application/pdf • Max 100MB

1
Upload corrupted PDF
Select the damaged PDF file you want to repair
2
Choose repair options
Select which issues to attempt fixing (structure, links, fonts, images)
3
Start repair process
Run the repair tool to fix detected problems
4
Download repaired PDF
Save the fixed PDF and check if issues are resolved

1

Select the damaged PDF file you want to repair

2

Select which issues to attempt fixing (structure, links, fonts, images)

3

Run the repair tool to fix detected problems

4

Save the fixed PDF and check if issues are resolved

Not all damage can be fixed. Success depends on severity. Severely corrupted files may only be partially recoverable.

Repairs aim to restore functionality. Some content or formatting may be lost if corruption is severe.

Common causes include incomplete downloads, storage errors, software crashes, and transmission errors.

Yes, enable post-repair validation to verify the PDF structure is now valid and openable.