Recover content from broken, corrupted or partially downloaded PDFs that refuse to open in your viewer. ZentoPDF rebuilds the cross-reference table, recovers page objects and produces a clean, repaired PDF — all in your browser.
Click to select a file or drag and drop
PDFs or Images
Your files never leave your device.
Drop the broken or partially downloaded PDF onto the upload zone, or pick it from your device. The file is processed locally; nothing is uploaded.
ZentoPDF scans the raw bytes, locates surviving object headers (pages, fonts, images), rebuilds a fresh cross-reference (xref) table and reassembles the document into a structurally valid PDF.
Click download to get a recovered, clean PDF that opens in standard viewers. Some pages may be missing or partial if the original file was severely damaged, but you usually get most of the content back.
Reduce the file size of your PDF documents while maintaining the best possible quality.
Remove metadata, annotations, scripts, and more.
Optimize PDF for fast web viewing.
Combine multiple PDFs into one file. Preserves Bookmarks.
Make a PDF searchable and copyable.
Most "PDF can't be opened" errors come from a missing or corrupted cross-reference table, a partially downloaded file or a malformed trailer. ZentoPDF can rebuild these structures from the surviving object stream and recover the pages, images and fonts inside.
No — if the underlying bytes are gone (e.g. the file is truncated to a few hundred bytes, encrypted with a lost key, or filled with random noise), there is nothing to recover. Repair works on files whose content is mostly intact but whose index/structure is damaged.
No. The repair runs locally in your browser. Your damaged PDF and the recovered output never leave your device, which makes the tool safe for confidential material you cannot send to an online server.
Visually yes for the recovered pages — text, images and layout are preserved. Internal structures (bookmarks, forms, JavaScript, attachments) may be partially lost if the relevant objects in the original file were damaged.
Yes — 100% free, no signup, no watermark, no daily quota. Repair as many broken PDFs as you need; the only cost is the time your device spends rebuilding the structure.