Open Source TypeScript PDF Editors

Create and modify PDF documents in any JavaScript environment. Create PDF documents from scratch, or modify existing PDF documents. Draw text, images, and vector graphics. Embed your own fonts. Even embed and draw pages from other PDFs. Written in TypeScript and compiled to pure JavaScript with no native dependencies. Works in any JavaScript runtime, including browsers, Node, Deno, and even React Native. Add, insert, and remove pages. Split a single PDF into separate ones. Or merge multiple PDFs into a single document. Create new forms or fill and read existing fields. Checkboxes, buttons, radio groups, dropdowns, option lists, and text fields are all supported. If you aren't using a package manager, UMD modules are available on the unpkg and jsDelivr CDNs. Note that only some PDF readers can view attachments. This includes Adobe Reader, Foxit Reader, and Firefox. If you are using the CDN scripts in production, you should include a specific version number in the URL.

A simple and hackable CLI tool for converting markdown to pdf. It uses Marked to convert markdown to HTML and Puppeteer (headless Chromium) to further convert the HTML to PDF. It also uses highlight.js for code highlighting. The whole source code of this tool is only ~250 lines of JS ~500 lines of Typescript and ~100 lines of CSS, so it is easy to clone and customize.

Mergist is an online tool to combine multiple PDF files into one. Mergist has no ads, no file size limits, and your files never leave your device.

OpenTheBook is a free, lightweight desktop reader for PDF, EPUB, AZW3, and MOBI files. It is intentionally not a book library: install it, double-click a book, and read. No account, no clutter, no cost. First release targets Windows and Ubuntu/Linux.

Thorium Reader is a free, open-source desktop application designed for accessible digital reading and e-book management. Built on the Readium Desktop toolkit, it supports EPUB publications and other digital reading formats. Users can import books from local directories or online catalogs using OPDS feeds. The application provides customizable reading layouts, typography adjustments, bookmarks, and navigation through tables of contents. Accessibility is a central priority, with support for screen readers such as NVDA, JAWS, and Narrator. Thorium Reader also supports publications protected with Readium LCP and includes multilingual interface localization. Available for Windows, macOS, and Linux, it delivers an advertisement-free reading experience without collecting personal reading data.