about
A print shop that fits in your browser
loolbook is a collection of 20 free pdf tools that run entirely in your browser. No installers, no accounts, no queue — open a page, drop a file, get a result.
the short version
- — Every tool runs locally. Your files never touch a server, because there isn't one.
- — Free and unlimited. No watermarks, no daily caps, no sign-up walls.
- — Honest results. If a tool can't help your file, it says so instead of pretending.
Why everything runs locally
Most online PDF tools upload your document to a server, process it, and send it back. That means waiting on transfers, trusting someone else's storage, and hoping the copy gets deleted. Vellum takes the other route: the processing code ships to your browser, the file is read from disk into memory, and the result is written straight back. Close the tab and it's gone — nothing was ever sent anywhere, so there is nothing to leak, breach, or "retain".
It's also simply faster. There's no upload wait, no download wait, and no file-size gatekeeping: the practical limit is your device's memory, not somebody's bandwidth bill.
What powers it
The site itself is a static build — plain pages served as-is, with the heavy lifting done by open-source projects: pdf.js for rendering and text extraction, pdf-lib for assembling and rewriting documents, JSZip for bundling multi-file results, and a WebAssembly build of qpdf for encryption work. All of it runs client-side.
Status & contact
All 20 tools are live. If something misbehaves — a file that won't convert, a result that looks wrong — that's a bug worth hearing about. See the privacy policy for how the site handles (i.e., doesn't handle) your data.