Is it safe to repair a PDF online?

Yes — and ours is safer than most. Many free online tools quietly upload your files to their servers to do the work. We don't. Everything happens inside your browser on your own device, so your files never reach the internet. There's no upload step, no server copy, and no way for us (or anyone else) to see what you're working on.

Are my files uploaded to a server?

No. There's no server-side processing here. The whole tool is a tiny app that runs in your browser — we don't even have a server that could receive your files. You can confirm this by opening your browser's network tab while you use the tool: nothing leaves your device.

Do I need to sign up or pay?

No. There's no account, no email collection, no credit card. The tool is free to use as much as you want, on as many files as you want. We're supported by a few unobtrusive ads on the page — not by your data.

Can it recover any PDF?

Most damaged files. Severely corrupted files where pages are physically missing can't be reconstructed — repair fixes structure, not content.

Does it work on encrypted PDFs?

Only if you have the password. Decrypt first using Password → Remove.

Will the repaired file be smaller?

Often yes — garbage collection removes orphaned objects, and streams get re-deflated.

Repair Corrupt PDF

Reconstruct and fix broken or corrupted PDFs. The recovery engine automatically repairs damaged internal file structures (like missing markers and corrupt data streams) so your document can be opened again.

Features

Rebuilds corrupt xref tables
Repairs missing %%EOF markers
Recovers truncated and malformed object streams
Removes duplicate object IDs
Garbage-collects orphaned data

How to repair corrupt pdf

Drop the broken PDF — Drag a PDF that fails to open or shows errors.
Repair — MuPDF re-parses the file from scratch and rebuilds its structure.
Save — Download the repaired PDF.

Frequently asked questions

Is it safe to repair a PDF online?: Yes — and ours is safer than most. Many free online tools quietly upload your files to their servers to do the work. We don't. Everything happens inside your browser on your own device, so your files never reach the internet. There's no upload step, no server copy, and no way for us (or anyone else) to see what you're working on.
Are my files uploaded to a server?: No. There's no server-side processing here. The whole tool is a tiny app that runs in your browser — we don't even have a server that could receive your files. You can confirm this by opening your browser's network tab while you use the tool: nothing leaves your device.
Do I need to sign up or pay?: No. There's no account, no email collection, no credit card. The tool is free to use as much as you want, on as many files as you want. We're supported by a few unobtrusive ads on the page — not by your data.
Can it recover any PDF?: Most damaged files. Severely corrupted files where pages are physically missing can't be reconstructed — repair fixes structure, not content.
Does it work on encrypted PDFs?: Only if you have the password. Decrypt first using Password → Remove.
Will the repaired file be smaller?: Often yes — garbage collection removes orphaned objects, and streams get re-deflated.