Free · Private · In your browser

Repair PDFLite

Best effort: reloads PDF with pdf-lib and saves a fresh copy. May fix minor corruption.

Drop your files here, or click to browse
Processed on your device — nothing is uploaded

How your files are handled

We built these tools so you never have to wonder where your documents go. Here is exactly what happens when you use them.

  • Your files are processed entirely in your browser using open-source libraries (pdf-lib, PDF.js, and others).
  • Nothing is uploaded to our servers. We have no backend that receives, stores, or scans your documents.
  • We cannot see, store, or access your files — not during processing, not after, not ever.
  • Processing uses your device's memory and CPU. Large files may take longer, especially on phones and tablets.
  • All tools are free with no paywall tricks, no hourly task limits, and no watermarks on your output files.

How it works

Three simple steps. Your files never leave your device, and the result downloads straight to your computer or phone.

Frequently asked questions

Common questions about privacy, pricing, and how these tools work.

More optimize tools

Other free PDF utilities that work the same way — private, in-browser, no sign-up.

How to repair PDF

Repair PDF attempts to recover a damaged or unreadable file by reloading and re-saving it. It tries several strategies in order, from a clean re-save to a full visual rebuild.

  1. Add the damaged PDF; repair is attempted entirely on your device.
  2. Click Repair PDF to run the recovery strategies in sequence.
  3. The tool tries a clean re-save, then a tolerant re-parse, then a visual rebuild if needed.
  4. Preview the recovered file and download it, noting which method succeeded.

Good to know: Best effort — not every corrupted file can be recovered.

Everything happens in your browser — your file is never uploaded, and there is no sign-up, watermark, or limit.

Frequently asked questions

Are my files uploaded to a server?

No. Every tool runs entirely in your browser using open-source libraries, so your file is processed on your own device and is never uploaded. We have no backend that receives, stores, or scans your documents.

Is it really free, and will there be a watermark?

Yes. There is no account, no sign-up, and no hourly limit, and the tools never add a watermark to your output. UnboundPDF is free and is not affiliated with Adobe.

Does it work on a phone or tablet?

Yes. The tools run in any modern mobile browser as well as on desktop. Because the work uses your device's own memory and processor, very large files simply take longer on phones.

Can it fix any broken PDF?

Not always. This is a best-effort repair, and badly corrupted files may be unrecoverable. When only the visual rebuild works, the recovered pages become images and text is no longer selectable.

How does it try to repair the file?

It runs three strategies in order: a clean structural re-save, a more tolerant re-parse, and finally rebuilding pages from rendered images as a last resort.