PDF Repair
Repair corrupted PDF files online for free. Fix broken PDFs, recover damaged documents, flatten forms, and optimize structure — all in your browser.
Repair Corrupted PDF — Fix Broken Files Online
A download that stopped at 97%. A USB drive that was unplugged too early. A file synced through a flaky internet connection. A PDF exported from an old scanner that no modern viewer can open. Corrupted PDFs are more common than most people think, and the error messages are always unhelpful — "The file is damaged and could not be repaired" tells you nothing about what actually broke.
Our Repair PDF tool analyses the internal structure of your damaged file, rebuilds broken cross-reference tables, recovers readable pages, and reassembles the document into a valid PDF that opens normally. It will not always recover 100% of the content — no tool can guarantee that if the raw data is gone — but for the vast majority of partially downloaded, truncated, or improperly saved files, the fix is complete. No watermark, and no signup for your first 2 tasks a day.
How to Repair a Corrupted PDF
The repair process is automatic. You open the broken file and the tool runs multiple recovery strategies right in your browser, from simple cross-reference rebuilds to deep page-by-page content extraction.
1. Upload the Broken PDF
Drag the damaged file from your device. Even files that refuse to open in Adobe Reader or Chrome can be uploaded here.
2. Analyse and Repair
The engine inspects the file header, cross-reference table, page tree, and content streams. Broken structures are rebuilt from available data.
3. Recover Pages
Readable pages are extracted and assembled into a valid PDF. The tool reports how many pages were recovered versus how many the file claims to have.
4. Download the Fixed PDF
Save the repaired file. It opens normally in every PDF viewer. Your file never leaves your device.
What Our PDF Repair Tool Can Fix
Not all corruption is the same. A truncated download needs a different fix than a scrambled cross-reference table. Our engine tries multiple strategies and picks the one that recovers the most content.
Cross-Reference Rebuilds
The most common form of corruption. The index that tells the viewer where each page lives gets damaged; our engine rebuilds it from scratch.
Truncated Downloads
Files that stopped downloading before finishing. The tool recovers all complete pages and discards the broken tail.
Malformed Headers
Some export tools write invalid PDF headers. The engine corrects the header and version tag so standard viewers can parse the file.
Broken Content Streams
Individual page content that is partially corrupted. Recoverable text and images are extracted; unreadable chunks are skipped gracefully.
Secure and Private
Runs in your browser — your file never leaves your device. No account needed.