Lab42

Fast. Private. Simple.

Built to be simple, accessible and respectful. Your documents never leave your browser for processing.

touch_app

Select a tool above to get started.

upload_file

Drop your PDF here

or click to browse from your computer

Pages to delete (e.g. 1, 3-5, 7)

First page is 1. Separate with commas, use hyphens for ranges.

Watermark Text

Set Password

Leave empty if the PDF is owner-only protected.

cloud_upload

Files processed on the server are automatically deleted within 1 hour.

info

Password protection works in all PDF readers. Browser viewers (Chrome, Edge) may still show annotation tools — use Adobe Acrobat for full enforcement.

Processing your PDF...

check_circle

Done! Your PDF is ready.

error

security Processing happens locally in your browser.

PDF Instruments

call_merge

Merge PDF

Combine multiple files into one document.

compress

Compress PDF

Reduce file size while keeping quality.

delete_sweep

Delete Pages

Remove unwanted pages from your file.

content_copy

Extract Pages

Save specific pages as a new PDF.

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Watermark

Add text or image stamps to pages.

lock

Protect PDF

Encrypt your PDF with a password.

lock_open

Unlock PDF

Remove password protection from files.

Explore All Tools

Privacy Commitment

Lab42 is built on the premise that your data belongs to you. We leverage client-side technologies to ensure that the actual processing of your PDF—whether it's merging, compressing, or unlocking—happens entirely within your browser's sandbox. No file uploads to cloud storage are required for the MVP tools, ensuring maximum privacy and speed.

Open Standards

Built with PDF.js and WebAssembly for native-like performance without the tracking.