What is Repair PDF and how does it work?

Repair PDF is a free online tool from HuntPDF. Repair corrupted PDFs, recover damaged pages, fix cross-references, repair fonts, optimize structure, and linearize for fast web viewing. You upload a file, the work happens on our servers, and you download the result. There is nothing to install and no account to create.

How do I use Repair PDF online?

Upload your file using the box above — drag it in, browse for it, or bring it in from your cloud storage. A preview appears so you can check you've picked the right file. Run Repair PDF, then download the result. You can rename it before you save it.

Is my file secure when I use Repair PDF?

Yes. The file you send to Repair PDF travels over an encrypted HTTPS connection and is processed automatically on our servers. It is never made public, never shared with anyone, and nobody reads it.

Does HuntPDF store my files after Repair PDF has run?

No. Your upload is deleted the moment Repair PDF finishes with it, and the file it produces is removed as soon as you have downloaded it, or when you upload another file, or when you close the page. Nothing is kept, and nothing is used to train anything.

Will the original quality and formatting be maintained?

Yes. Repair PDF is built to leave your content exactly as it is — only the change you asked for is applied. Nothing else about the file is altered or re-compressed.

Can I use Repair PDF on mobile?

Yes. Repair PDF works in any modern browser on phones and tablets — iPhone, iPad or Android — with nothing to install. You can upload straight from your device or from your cloud storage.

Can I rename my file before downloading it from Repair PDF?

Yes. The file Repair PDF gives you back keeps the name of the file you uploaded by default. If you'd rather call it something else, edit the name in the field next to the download button before you save it.

Do I need to install any software to use Repair PDF?

No. There is nothing to download, install or sign up for — Repair PDF is used from your browser and does the work on our servers, so it behaves the same on Windows, macOS, Linux, Android and iOS.

How long does Repair PDF take?

Most files are finished in a few seconds. A large or page-heavy file takes a little longer, because Repair PDF runs on our servers rather than on your device — but you won't be waiting around. You can upload files up to 250MB.

Is Repair PDF free to use?

Yes. Repair PDF is free, with no signup, no watermark on the result and no daily limit for normal use.

Can Repair PDF fix any broken PDF?

It fixes damage to the file's internal structure, such as a broken index or a missing end section, as long as the page content is still inside. A file that is empty or was overwritten has nothing to recover.

Why repair a PDF that already opens?

Some PDFs open in one viewer but fail in another. Repairing rewrites the structure cleanly, which removes many of the errors other programs complain about.

What happens when I upload a PDF that won't open at all?

The page flags that it can't be read as it is, then tries three recovery methods and keeps the best result for you to download.

Should I repair a file before converting or merging it?

If a converter or Merge PDF reports that a file can't be read, run it through here first. Continue with this file passes the fixed copy on.

What if the repaired file is still missing pages?

Get a fresh copy from wherever the file came from and repair that. Content lost before the file reached you can't be rebuilt.

Does Repair PDF change how my document looks?

The aim is to keep the pages as they were and fix only the structure around them. Flick through the repaired copy before you send it on.

Repair PDF Online – Free, No Watermark, No Signup

Drop your file on the target

Several files · up to 260 MB each · deleted after processing

Drop your file here

Choose file

Fixes PDFs that won't open or show errors
Up to 260 MB per file

Processed on our secure servers over HTTPS. Your files are deleted automatically after processing.

Repair PDF rebuilds the internal structure of a PDF that won't open, shows an error, or behaves oddly in your reader, and gives you a fresh copy to download. Most broken PDFs come from an interrupted download or a program that crashed while saving.

How to use Repair PDF

Drop the damaged file on the page, or choose it from your device, Google Drive, Dropbox or OneDrive (up to 260 MB). If it can't be opened at all, the page says so and tries three recovery methods, keeping the best result. If it opens but another app complains, repairing still rewrites its structure, which clears many hidden errors. Press Repair PDF, then download the result or hand it on with Continue with this file.

When Repair PDF helps

Typical cases: a bank statement that downloaded halfway on a weak connection, or a contract attachment your reader calls damaged. Upload portals are another. A visa or tender portal may reject a file as invalid even though it looks fine to you, and a rebuilt copy often goes through.

What repair can and can't recover

Repair PDF works on files that are structurally broken but still contain their pages. It cannot bring back content that was never saved, so a 0 KB file, or one that was overwritten, has nothing left to rebuild. If the result is missing pages, download the original again from its source, such as the first email or the website.

Frequently asked questions

Can Repair PDF fix any broken PDF?: It fixes damage to the file's internal structure, such as a broken index or a missing end section, as long as the page content is still inside. A file that is empty or was overwritten has nothing to recover.
Why repair a PDF that already opens?: Some PDFs open in one viewer but fail in another. Repairing rewrites the structure cleanly, which removes many of the errors other programs complain about.
What happens when I upload a PDF that won't open at all?: The page flags that it can't be read as it is, then tries three recovery methods and keeps the best result for you to download.
Should I repair a file before converting or merging it?: If a converter or Merge PDF reports that a file can't be read, run it through here first. Continue with this file passes the fixed copy on.
What if the repaired file is still missing pages?: Get a fresh copy from wherever the file came from and repair that. Content lost before the file reached you can't be rebuilt.
Does Repair PDF change how my document looks?: The aim is to keep the pages as they were and fix only the structure around them. Flick through the repaired copy before you send it on.