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MuPDF is a lightweight PDF and XPS viewer.

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Which is more popular?
Based on our record, MuPDF seems to be a lot more popular than Cert Decoder. While we know about 21 links to MuPDF, we've tracked only 1 mention of Cert Decoder.
Website, pricing, platforms and company facts side by side.
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| Website | mupdf.com | certdecoder.com |
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| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of MuPDF yet.
Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
MuPDF is recommended for users who need a lightweight and fast PDF viewer that can handle a variety of document formats. It is particularly suitable for those who prefer open-source software and require a tool that can be easily integrated into custom applications. Additionally, it is ideal for developers looking for a library to incorporate PDF functionality into their software products.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
MuPDF - Lightweight PDF Viewer - Linux XFCE
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing MuPDF and Cert Decoder.
Cert Decoder's answer:
I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.
Cert Decoder's answer:
certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Cert Decoder's answer:
Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Share your experience with using MuPDF and Cert Decoder. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


However, MuPDF App Kit has been discontinued. This discontinuation affects numerous Android & iOS PDF viewers and editors relying on MuPDF App Kit libraries, rendering them incapable of delivering PDF functionalities...
MuPDF is another small PDF reader. MuPDF allows users to view and edit PDF files, fill out forms and leave annotations on the document. Another feature of MuPDF is that it allows the user to convert their PDF file...
We have no reviews of Cert Decoder yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Sioyek uses the MuPDF engine, which supports EPUB: https://mupdf.com/. - Source: Hacker News / about 2 years ago
MuPDF mini (version 1.23.3a): Minimalist viewer for PDF, XPS, CBZ, unprotected EPUB, and FB2 documents. Source: almost 3 years ago
Mupdf is the mupdf of epub; it supports epub and other formats beyond pdf¹. When I've had really large files I've used mupdf to read them a few times, as it seems to be far better at handling them than other tools. ¹ https://mupdf.com/. - Source: Hacker News / about 3 years ago
Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
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Try easy-to-use PDF tools that keep your documents safe. Work with your important files across all platforms and devices with the ultimate all-in-one document solution. Your productivity lives at Xodo!
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Foxit Reader is a free and light-weight multi-platform PDF document viewer.
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