Optimize PDF
Repair PDF
Try to fix a damaged PDF
Best-effort recovery for corrupted or partially downloaded PDFs.
Browse all toolsFiles processed in your browser — never uploaded
In your browser
Files never leave your device.
Instant
No signup, no upload queue.
Free forever
All tools, no paywall, no watermarks.
No tracking
We don't keep or analyze your files.
How to use Repair PDF
Step 1
Drop the PDF
Add the file you want to optimize. Encrypted PDFs work too.
Step 2
Pick a quality preset
Balance file size against visual quality with one click.
Step 3
Optimize in-browser
The PDF is repacked locally — no upload, no waiting in a queue.
Step 4
Save the result
Compare the before/after size and download the new copy.
Frequently asked questions
Everything we get asked most often about Repair PDF.
Are my files uploaded to a server?
No. Every conversion runs inside your browser using WebAssembly. Your files never leave your device — not even temporarily.
Is the output watermarked or limited?
No watermarks, no signup wall, no size cap beyond what your browser can handle. Every download is yours, plain and unbranded inside the file.
Does this work on mobile?
Yes. The tool works in any modern browser on iOS, Android, Windows, macOS, or Linux. Large files may run faster on a desktop, though.
Will my PDF lose quality?
We offer three quality presets so you can pick the tradeoff. The Light preset is nearly lossless; Strong shrinks aggressively.
Why didn't my file get smaller?
PDFs that are already optimized (or text-only) leave little to compress. Compression mostly helps PDFs with embedded photos.