Mozilla PDF.js
6.4#11 in file reader softwareFree planFree planWebAPIExtensionLinux
VisitMozilla PDF.js vs MuPDF
What both publish
| Fact | Mozilla PDF.js | MuPDF |
|---|---|---|
| Annotation tools | Yes | Yes |
| Free plan | Yes | Yes |
| Platform support | web | cross-platform |
| Purpose | PDF.js is a web standards-based platform for parsing and rendering PDF files. | MuPDF is a fast, embeddable SDK for managing PDF and other document formats. |
| Security reporting | The project directs reports about the library or Firefox PDF Viewer to Bugzilla and reports about the Chrome extension to GitHub’s private vulnerability reporting form. | Artifex asks researchers to report MuPDF vulnerabilities confidentially through its secure reporting system and requests 90 days of confidentiality while it works to resolve them. |
| Support | The project points users to GitHub issues for technical problems and its Matrix room for questions or guidance. | Open-source users can seek community help through Discord and the bug tracker, while commercial license holders can contact technical support by replying to their introductory email. |
Mozilla PDF.js plans
- PDF.jsFree
MuPDF plans
- Commercial$299 a month
- Enterprise—
- AGPL LicenseFree
- OEM Distribution LicensePriced on request
- Subscription LicensePriced on request
Pick Mozilla PDF.js if…
PDF.js suits developers who want to embed PDF rendering or build a custom viewer. It is also relevant to contributors interested in the community-driven project.
Pick MuPDF if…
MuPDF is for developers who need document handling in desktop, cloud/server, or embedded software. It may suit teams evaluating an open-source option, provided they can meet AGPL terms or arrange commercial licensing.