About LambiPdf 🐑
A private, in-browser PDF toolkit.
LambiPdf is a free set of PDF tools that runs entirely in your browser. There's no upload and no account — your files never leave your device.
What you can do
Organize & merge
Combine PDFs and images, reorder, rotate, delete, and duplicate pages.
Split & extract
Split by page, ranges, or every N pages, or pull out just the pages you pick.
Watermark & numbering
Add diagonal watermarks and Bates-style page numbers.
Sign & fill forms
Drop a signature or logo onto a page, and fill AcroForm fields.
Redact
Black out sensitive areas — redacted pages are flattened so the content is truly removed.
Encrypt & decrypt
Password-protect PDFs with AES, or remove a password you know.
Convert
Turn images into PDFs, export pages to images, or extract text to a file.
Edit metadata
View and update title, author, subject, keywords, and more.
Why private by design
Most online PDF tools upload your documents to a server. LambiPdf doesn't. By doing all the work in your browser, your sensitive contracts, IDs, and records stay on your machine — which is faster, works offline, and keeps you in control.
How it works
LambiPdf uses well-established open-source libraries (pdf.js for rendering, pdf-lib for editing and encryption, and JSZip for archives), all bundled locally so the app makes no external requests. See the Privacy Policy for the full picture.
Support the project
LambiPdf is free. If it saved you time, you can leave a tip via the “Buy me a coffee” button in the app — a small pat on the back that keeps it free and private.