Repair PDF files
Attempt to recover a PDF that won't open or displays errors. PDF Lab rebuilds the document structure in your browser to produce a clean, readable file — no server needed.
or drop files here
Tip: select a single file.
How to use Repair PDF
- 1Click "Select PDF file" and choose the corrupted or damaged PDF you want to repair.
- 2The tool analyzes the file structure and attempts to recover all readable content.
- 3Click Repair PDF. The rebuilt file is saved in your browser and downloaded.
Why use PDF Lab
- Recover readable content from corrupted or partially damaged PDF files.
- Files stay on your device — nothing is uploaded to any server.
- No account, no signup, no watermark on the output.
- Free to use with no per-file limits beyond your device's memory.
- Works on desktop and mobile browsers, including offline after first load.
- Rebuilds the internal PDF structure without touching your original file.
Your file never leaves your browser
Repair PDF runs entirely on your device using pdf-lib and pdf.js — both self-hosted by PDF Lab, so no third-party CDN sees your traffic. There is no upload, no account, no log of your file.
How browser-based PDF processing works →Repair PDF — questions
- No. Every operation runs in your browser using JavaScript. Your file is loaded into your browser's memory, processed, and a result is saved to your device. Nothing is sent over the network.
- No. Because the processing happens in your browser, neither PDF Lab nor any third party has access to the file contents. You can verify this by opening your browser's network tab while using the tools — no file data is transmitted.
- There is no enforced limit, but performance depends on your device's memory. Most modern browsers comfortably handle PDFs up to about 100 MB. Very large files may slow down your browser tab.
Are my files uploaded to your server?+
Can PDF Lab see the contents of my files?+
Are there file size limits?+
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