Free Online Repair PDF
Fix corrupted, damaged, or unreadable PDFs — 100% private and secure in your browser.
Repair PDF
Upload your corrupted PDF. We'll rebuild it by copying all pages to a clean new file — often fixes minor corruption issues.
How to Repair a Corrupted PDF Online for Free in 2026
PDF files can become corrupted due to incomplete downloads, disk errors, software crashes, or transfer issues — resulting in unopenable or garbled documents. Our free tool attempts to repair them by rebuilding the PDF structure entirely in your browser.
Using PDF-Lib, it loads your file, copies every page to a brand-new document, and saves it clean. This method often resolves syntax errors, minor structural damage, and compatibility problems without sending anything to a server.
Key Features
- Client-Side Repair: Everything happens in your browser — zero upload.
- Rebuild Technique: Copies pages to a fresh PDF (fixes many common corruptions).
- Real-time Preview: See your file before repair.
- No Limits: Free, no registration, no watermarks.
- Privacy First: Your document never leaves your device.
Common Use Cases
Recovered work reports, fixed downloaded invoices, repaired academic papers, restored scanned contracts, salvaged family documents — whenever a PDF won't open properly in Adobe Reader, Chrome, or other viewers.
Frequently Asked Questions
Is this PDF repair tool free?
Yes. Completely free, unlimited use, no signup, no hidden fees.
Is my file safe and private?
Yes. 100% client-side processing — nothing is uploaded or stored on any server.
Will it fix every corrupted PDF?
It fixes many common issues (structural, syntax, partial corruption). Severe damage (missing large data chunks) may only allow partial recovery or fail. For tough cases, try professional software like Adobe Acrobat.
What kind of corruption does it repair?
Minor file header issues, broken cross-references, viewer compatibility problems, and files that open but look wrong — by rebuilding from scratch.