The private, offline-first
PDF toolkit
Merge, split, compress, encrypt, reorder and stamp your documents, fast. It runs entirely on your machine, so files never leave your device. Free to start — the viewer is free forever, and founding members get full Pro free for 6 months.
Why on-device matters
Most PDF tools upload your document to a server to do the work. LumvalePDF does not — the whole engine runs on your machine, so there is no upload, no queue, and no copy of your file sitting on someone else's infrastructure.
Your files never leave your device
Nothing is uploaded, so nothing can be retained, logged, or exposed in someone else's breach. Zero data collection.
Works fully offline
On a plane, on a locked-down corporate network, or with no connection at all — every operation still runs.
No upload, no waiting
There is nothing to send and nothing to download back. Big documents are bound by your machine, not your connection.
Built for data sovereignty
Regulated, confidential and client-privileged work stays exactly where it is: on your device, under your control.
Windows
Installs from the Microsoft Store. The Store build is signed, so it installs without a security warning.
Get it on the Microsoft StoreLinux
Recommended: download the AppImage, make it executable, and run it — it updates itself from then on.
AppImage (x86_64)Prefer a package?
The AppImage updates itself. The .deb does not — there is no apt repository behind it, so you would download a newer one to upgrade.
The free viewer never expires, and founding members get full Pro free for 6 months. The same engine is also available to build on as an SDK, a CLI and a local MCP server.
Everything you need, nothing uploaded
A full document workspace, running on-device. Every operation happens locally on your machine, no file is ever sent to a server.
Merge & Reorder
Combine PDFs in a dual-pane, drag-and-drop workspace and reorder pages from a thumbnail sidebar.
Split & Extract
Visually select and pull out exactly the pages you need, then download them as a new document.
Lossless Compression
Shrink file size while keeping quality intact — processed entirely on your machine.
Encrypt & Protect
Add AES-256 user and owner passwords to lock documents down before you share them.
Stamp & Edit Metadata
Stamp logos, signatures or custom text, and view, edit, or scrub Title, Author, Keywords and other document metadata.
Bookmarks & Bates
Organise with bookmarks and apply Bates numbering for legal and professional workflows.
The same engine, wherever you build
LumvalePDF is built on one on-device engine, exposed as a JavaScript/TypeScript SDK, a command-line tool, and a local MCP server, so your own apps and AI agents can run PDF operations locally, without a server.
Talk to us about integrating the engineReady to take control of your documents?
A fast, private PDF toolkit that runs entirely on your machine, your files never leave your device.
Get it free on the Microsoft Store