lamina

lamina creates, reads, edits and saves PDFs. One Rust core does the work. It runs natively, and as WebAssembly in browsers, Node, Deno, Bun and Cloudflare Workers. It takes bytes and gives back bytes: it doesn’t touch the file system or the network, and it reads no clock.

• lamina is the Rust crate: Document::open_bytes, Builder, saving and jobs you can cancel.
• @lamina/pdf is the TypeScript API over the WebAssembly build. After one await init(), every call is synchronous, and the API is the same in every runtime.

Not published yet

Neither package is on a registry yet. Install explains how to use them from a checkout, a pnpm pack tarball or a path dependency.

What it does today

Area	What you get	Guide
Generate	Pages, text with shaping, bidi and line breaking, embedded and subset fonts, the standard 14, vectors, colour, images, tagged PDF	Fonts and text, Images and vectors
Navigate	Links, named destinations, outlines, page labels, Info and XMP metadata	Links, outlines and metadata
Edit	Ops in transactions, undo and redo, incremental or full saves that respect signatures	Open, edit and save
Read safely	Repair of damaged files as warnings, resource limits, strict mode, passwords (R2–R6)	Encrypted files, Limits
Errors	One coded error and warning shape on every surface	Errors and warnings

Each code block on this site is one of the repository’s tested example files, loaded when the site is built, so the code shown is the code that runs. Every example produces the same bytes in Rust and in each JavaScript runtime. Browse them in the examples gallery.

Start here

Pick your runtime: browser or bundler, Node, Deno, Bun, Cloudflare Workers or Rust.