Repair, recover and fix corrupted or broken PDF documents instantly. Rebuilds document structure page by page — locally in your browser with no signups and no watermarks.
Select a corrupted or broken PDF — or drag & drop
Dudi PDF Repair is a fast, 100% free, browser-based tool from Dudi PDF Editor that repairs and recovers corrupted or broken PDF documents in seconds. Whether your PDF refuses to open at all, shows a "file is damaged" error in Adobe Acrobat, has broken formatting, missing pages, an invalid cross-reference table, or was interrupted halfway through a download, this tool attempts to rebuild the document structure and produce a clean, standards-compliant PDF you can actually open again. It does all of this without installing software, creating an account, verifying an email or paying any hidden fee. Unlike other online PDF repair tools, your document is never sent to any external server. All parsing, repair and reconstruction happen locally in your browser using the well-known pdf.js and pdf-lib JavaScript libraries — your file is read from your device, its structure is rebuilt in memory, and the finished PDF stays on your device until you press the Download button. That means your confidential reports, legal contracts, invoices, academic papers and internal company files never leave your computer or phone. There is no signup, no watermark added by us, no daily limit and no page-count restriction beyond your device's memory. Dudi PDF Repair uses a careful multi-step approach to recover as much as possible. It first inspects the file with the strict parser, and if that fails it retries with relaxed parsing rules that tolerate malformed xref tables, broken object streams and incorrect byte offsets — the most common causes of PDF corruption. It then rebuilds the document structure page by page, preserving every recoverable page along with its text, images, hyperlinks and basic layout. A statistics panel shows the file size, page count, PDF version and encryption status before and after repair, so you can see exactly what was recovered and how the file size changed. The repaired output opens correctly in Adobe Acrobat, Chrome, Edge, Safari, Firefox and every common PDF reader. Because the tool never downloads automatically, nothing is saved to your disk until you choose it: after the repair is processed, a Download button appears and you decide when to save the file. The downloaded file is always named Dudi PDF Editor Repaired PDF.pdf, and if you repair another file in the same session it becomes Dudi PDF Editor Repaired PDF (2).pdf and so on, so your files stay clearly identifiable. Some PDFs are simply too damaged to recover — for example when the page objects themselves are missing or the file has been truncated to a fraction of its original size. In those cases Dudi PDF Repair tells you clearly that recovery was not possible rather than producing a broken output. If the PDF is password protected, unlock it first with the Dudi Unlock PDF tool and then run it through Dudi PDF Repair. If the file needs further edits after repair, the Dudi PDF Editor tool can rotate, crop, sign, annotate or merge it. The layout is fully responsive, so the statistics panel, repair button and download button all stay easy to use on a small Android phone as well as on a large desktop monitor. After the first page load the libraries are cached, so the tool often keeps working even on a weak connection. If you need more tools, Dudi PDF Editor also offers OCR, PDF to Word, PDF to JPG, Protect PDF, Watermark PDF, Unlock PDF, Merge PDF, Split PDF, Compress PDF, Rotate PDF, PDF Page Numbers, Sign PDF, Word to PDF, JPG to PDF, editing, cropping, extract images and many other privacy-first utilities that all run locally in your browser with the same no-upload guarantee.