Repair your PDF Online

Do you have a document file, such as a PDF file, that will not open correctly? If so, our free-to-use PDF repair tool may be able to help. Our tool analyses the content of your PDF file and is able to determine if the file structure is valid. Our tool will let you know what is wrong with your PDF file and attempt to fix it.

Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.

Please note: Your PDF, once uploaded to our server, will be deleted 15 minutes after upload.
If our tool offers the option to repair your file, please ensure you download the repaired file within this time period.

How to Repair your PDF Online?

Here are 3 simple steps to repair your PDF using our fast and free repair tool.

Upload your PDF

Click the "Select File" button, then select a PDF file. The maximum file size is 100MB.

Analysis and Repair

Your PDF file will be analysed, and our tool will attempt to repair your PDF file if possible.

Repair or Convert your PDF

Select an option to either repair or convert to receive your repaired PDF file.

PDF file format information

Full NamePortable Document Format
Mime Typeapplication/pdf

A PDF (Portable Document Format) file is a digital document format used to present and exchange information consistently across different platforms and devices. Developed by Adobe in the early 1990s, PDF files have become one of the most widely used file formats for sharing documents in a professional and standardized manner. The key feature of PDF is its ability to preserve the formatting, fonts, images, and layout of a document, regardless of the software, hardware, or operating system being used to view it. This makes PDF files ideal for sharing documents that need to look the same to all recipients, ensuring that the content remains intact and consistent.

PDF files are particularly popular for a variety of reasons. Firstly, they are highly compressed, which means they can contain a significant amount of data without consuming much disk space. Secondly, they are platform-independent, meaning they can be viewed and printed on any device or operating system, such as Windows, macOS, Linux, or mobile devices. Thirdly, PDF files are typically read-only, which helps prevent unauthorized modifications to the content, making them suitable for distributing sensitive documents or legal contracts.

Over the years, PDF has evolved, and many additional features have been introduced, such as interactive form elements, annotations, digital signatures, and support for multimedia elements. This versatility has made PDF an essential format for a wide range of applications, including eBooks, user manuals, brochures, invoices, and academic papers. As a result, numerous software tools and applications have been developed to create, view, edit, and manipulate PDF files, making it a cornerstone of modern digital document management.

Repairing a PDF File

PDF File Header Data

PDF files contain a sequence of unique bytes at the beginning of the file. This header section is usually followed by the main PDF file section. Where the header block is present, our document repair tool will parse the header data to validate the file type and also provide additional metadata that describes key characteristics of the document uploaded.

Frequently Asked Questions

Is it free to use the PDF file repair tool?

Yes! Our PDF repair tool is 100% free to use.

Are there any usage limits when repairing my PDF file?

No, you can repair as many files as you wish. We do not have any limits when using our PDF repair tool.

How long does it take to repair my PDF?

We aim to process PDF repairs as quickly as possible; this usually takes around 5 seconds; however, this may be longer depending on the file size and data needed to be repaired.

What does the PDF repair process involve?

Once your PDF has been selected, it will undergo some initial checks to verify that the file has some basic information. If the initial checks pass, we then upload the file to our servers for more detailed analysis.

Is it safe to repair my PDF on

Yes, of course it is! Your PDF, once repaired, is deleted 15 minutes after upload, and any download link will expire after this time.

Can I repair my PDF on Windows, Linux, Android, iOS or Mac OS?

Yes! Our PDF repair tool will run on any system with a modern web browser.