Repair PDF
Diagnose damaged PDFs, repair structural errors, and recover readable pages from files that won't open correctly.
Choose a PDF to repair
Choose one PDF, or drop it here.
Your PDF is processed locally in your browser and is not uploaded to a server. The original file is not modified.
Not every damaged PDF can be repaired. Very large or severely damaged files are limited by available device memory and recoverable data.
How to use Repair PDF
- 1
Click Choose PDF or drag and drop the damaged document into the upload area. The tool automatically analyzes the file and checks whether its structure or visible pages can be recovered.
- 2
Review the diagnosis displayed beneath the filename. If Structural repair available appears, click Repair PDF to rebuild the document. You can also use this option when the diagnosis says Readable PDF, as rebuilding may resolve compatibility issues.
- 3
If structural repair is unsuccessful but some pages remain readable, the tool displays Visual recovery available or Partially recoverable. Click Recover visible pages to create a new PDF from the pages that can still be rendered.
- 4
Once processing finishes, review the result type, original and output file sizes, and recovered page count. If any pages could not be recovered, their numbers will be listed.
- 5
Click Download PDF to save the repaired document. Select Start over to examine another file.
Frequently asked questions
About Repair PDF
A PDF can become difficult to access even when much of its original information is still present. An interrupted transfer, an incomplete download, or a problem during document creation may leave internal references inconsistent. The result might be a file that opens in one PDF reader but fails in another, displays errors, or refuses to load entirely. Repair PDF examines the available document data to determine whether a usable replacement can be created.
The process begins with an automatic diagnosis rather than immediately rewriting the document. When the underlying PDF structure can be reconstructed and the result passes verification, the tool offers a structural repair. This method rewrites recoverable document information while retaining the original page content where possible. It is particularly useful when a document's internal organization has become inconsistent but its pages and resources are still accessible.
Some PDFs are too damaged for structural rebuilding, yet their pages can still be displayed. In these situations, visual recovery provides an alternative. Each renderable page is reproduced as an image inside a new PDF, preserving its visible appearance rather than its editable or interactive properties. Pages that cannot be rendered are excluded, and the tool identifies any omissions. This approach can be valuable for retrieving readable records, scanned paperwork, or reference material when accessing the information matters more than retaining the original PDF structure.
After recovery, the results show the repair method, the original and reconstructed file sizes, and the number of pages successfully included. These details help you evaluate the outcome before downloading. Neither method guarantees that every damaged document can be restored, so the recovered PDF should always be inspected before being relied upon.
All analysis and recovery operations take place locally in your browser, without uploading the document to a processing server. Your source file remains unchanged, allowing you to keep the original while saving a separate repaired or recovered copy.