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

Letterbox
Goodreads
Trakt.tv
Simkl
Organize your books, movies, TV shows, games, and podcasts in one Kanban-style tracker. Drag items from backlog to completed. Custom lists for anything.

Which is more popular?
Based on our record, Cert Decoder seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | certdecoder.com | backlogbox.com |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from the Netherlands · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


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.
BacklogBox is a media backlog tracker that combines book, movie, TV show, game, and podcast tracking into one app. Instead of juggling Goodreads, Letterboxd, Backloggd, and Trakt, you get a single Kanban board per media type.
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Cert Decoder and BacklogBox.
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.
BacklogBox's answer:
I was using Letterboxd for movies, Goodreads for books, Backloggd for games, and a spreadsheet for TV shows. Every time I finished something I had to remember which app to open. Half the time I just forgot. So I built one app to replace all of them.
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
BacklogBox's answer:
SvelteKit, TypeScript, PostgreSQL.
Cert Decoder's answer
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
BacklogBox's answer:
People who consume multiple types of media and want a single place to organize it. Readers who also game, movie watchers who also follow TV shows, anyone with a growing backlog across different media types who is tired of juggling separate apps or spreadsheets.
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.
BacklogBox's answer:
Most media trackers only cover one type — Letterboxd for movies, Goodreads for books, Backloggd for games. If you consume multiple types of media, you end up with five different apps and no unified view. BacklogBox gives you one Kanban board per media type, auto-searches from TMDB, OpenLibrary, IGDB, and Apple Podcasts, and has a Discover page for finding new content across all categories.
Cert Decoder's answer
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
BacklogBox's answer:
BacklogBox is an early-stage product for individual users. There are no enterprise customers — it is built for people who want to organize their personal media backlogs.
BacklogBox's answer:
It is the only media tracker that covers books, movies, TV shows, games, and podcasts in a single app with Kanban boards. Instead of maintaining separate accounts on Goodreads, Letterboxd, Backloggd, and Trakt, everything lives in one place. You also get custom lists for tracking anything that does not fit the built-in types
Share your experience with using Cert Decoder and BacklogBox. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


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
Tracking BacklogBox since Feb 2026.