Repair PDF tries to recover a document that will not open, shows blank pages or prints incorrectly. It reads the file, rebuilds the internal structure and saves a clean copy. It cannot restore data that is truly missing, but it often rescues files damaged by interrupted downloads or faulty exports. Your file never leaves your device: the work happens in your browser, with no upload and no account.
No. If the content itself is gone, it cannot be recovered, but structural damage is often fixable.
No. Repair runs in your browser.
It rebuilds the file structure and keeps the recoverable content.
Common causes are an incomplete download, a broken export or a damaged cross-reference table.