Cert Decoder VS ActiveMemo

Which is more popular?

Based on our record, Cert Decoder seems to be more popular. It has been mentioned 1 time since March 2021.

social mentions: 1 vs 0
Monitoring Tools popularity: 100% vs 0%

Base details

Website, pricing, platforms and company facts side by side.

	Cert Decoder	ActiveMemo
Website	certdecoder.com	plaindocktools.com
Pricing	Free	Paid Free trial $5.99 / Monthly (ActiveMemo Pro) Official pricing
Platforms	Web	Windows
Company	—	2026
Listed in	SSL Certificates Decoding Website Monitoring Monitoring Tools +1	Productivity Office & Productivity Memo Utilities +1

About Cert Decoder and ActiveMemo

In their own words, as submitted to SaaSHub.

Cert Decoder

ActiveMemo

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.

Features and specs

What each product offers, as listed by its team.

Cert Decoder 4 features

ActiveMemo 7 features

User-Friendly Interface
Cert Decoder is designed with a simple and intuitive interface that makes it easy for users to navigate and use the tool without requiring extensive technical knowledge.
Comprehensive Analysis
The tool provides detailed analyses of certificates, including information about validity, issuer, encryption algorithms, and more, helping users understand their security certificates thoroughly.
Free to Use
Cert Decoder offers its services free of charge, making it accessible for individuals and organizations without budget constraints.
Quick Processing
The tool processes certificate information rapidly, providing almost instant results for users, which is crucial for time-sensitive tasks.

Possible disadvantages

Limited Advanced Features
Compared to some paid alternatives, Cert Decoder might lack advanced features that are necessary for more complex certificate management and diagnostics.
Reliance on Internet Access
Users need an active internet connection to utilize the tool, which can be a limitation in areas with unreliable internet service.
Privacy Concerns
While using an online service to decode certificates, there can always be privacy concerns regarding sensitive data being uploaded to a third-party server.
No Offline Mode
Cert Decoder does not offer an offline mode, which could be a drawback for users who require functionality without constant internet availability.

Keep Active support
Helps reduce sleep and display timeout interruptions during long work sessions.
Quick local notes
Write short notes in a compact window while working.
Local memo storage
Memos are stored locally on your PC.
Memo search
Search across saved notes to find text quickly.
Copy and export support
View, copy, and export existing memos when needed.
Import support
Import memo content when needed.
7-day free trial
Try all features free for 7 days before upgrading.

Analysis

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

Cert Decoder

ActiveMemo

Overall verdict

Cert Decoder appears to be a free online tool for decoding and inspecting SSL/TLS certificates, CSRs, and related cryptographic data, making it useful for quick, no-install certificate analysis, though it should be used with awareness of general web tool privacy considerations when handling sensitive certificate data.

Why this product is good

Provides quick, browser-based decoding of certificates without needing to install software
Useful for troubleshooting SSL/TLS certificate issues on the fly
Simple interface aimed at both technical and semi-technical users
No cost to use for basic certificate decoding tasks

Recommended for

System administrators needing to quickly verify certificate details
Developers debugging SSL/TLS configuration issues
IT support staff troubleshooting website certificate errors
Students or professionals learning about certificate structure and encoding

Overall verdict

I don't have verified information about ActiveMemo or plaindocktools.com, as this doesn't appear to be a widely recognized or documented product/service that I can confidently evaluate. I'd recommend researching independent reviews, checking the website directly, and looking for user feedback before forming an opinion.

Why this product is good

Unable to verify claims about this specific product without additional context
No independent reviews or documentation found to assess quality or reliability
Cannot confirm legitimacy, features, or user satisfaction for this specific tool

Recommended for

Users should independently verify this product through official sources, reviews, and trusted third-party evaluations before making a decision
Consider checking sites like Trustpilot, G2, Capterra, or Reddit for genuine user experiences
Reach out to the company directly for a demo or trial before committing

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100

Cert Decoder

ActiveMemo

100% 100%

Monitoring Tools

0% 0%

Productivity

100% 100%

Website Monitoring

0% 0%

Office & Productivity

100% 100%

Questions & Answers

As answered by people managing Cert Decoder and ActiveMemo.

What's the story behind your product?

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.

ActiveMemo's answer:

ActiveMemo started from a simple Windows workflow problem: during long desktop sessions, work can be interrupted by sleep or display timeout, and users may also need a quick place to write short notes without opening a heavy notes app.

The goal was to build a compact Windows utility that keeps the workflow simple: Keep Active support, quick local notes, local storage, and basic memo operations without turning it into a full notes platform.

Which are the primary technologies used for building your product?

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

ActiveMemo's answer:

ActiveMemo is built as a Windows desktop application using .NET and WinForms, and is distributed through Microsoft Store.

How would you describe the primary audience of your product?

Cert Decoder's answer

certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.

ActiveMemo's answer:

The primary audience of ActiveMemo is Windows users who work in long desktop sessions and want to reduce interruptions caused by sleep or display timeout.

This includes people reading long documents, waiting for builds or exports, working online, checking long-running tasks, or keeping short work notes nearby without opening a heavy notes app.

Why should a person choose your product over its competitors?

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.

ActiveMemo's answer:

A person should choose ActiveMemo if they want a simple Windows work helper that combines Keep Active support with quick local notes.

Many similar tools focus only on keeping the PC awake. ActiveMemo adds a compact local memo window, so users can keep short notes, search saved memos, copy text, import content, and export existing memos when needed.

It is useful for reading documents, waiting for builds or exports, working online, or checking long-running tasks.

Who are some of the biggest customers of your product?

Cert Decoder's answer

certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.

ActiveMemo's answer:

No public customer list is available yet. ActiveMemo is an early-stage independent product by PlainDock Tools.

What makes your product unique?

ActiveMemo's answer:

ActiveMemo combines Keep Active support with quick local notes in one compact Windows utility.

Instead of being only a keep-awake tool or only a notes app, ActiveMemo is designed for long work sessions where users want to reduce sleep or display timeout interruptions while keeping short work notes nearby.

Memos are stored locally on the user's PC, and the app stays focused on a lightweight Windows workflow.

User comments

Share your experience with using Cert Decoder and ActiveMemo. For example, how are they different and which one is better?

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Cert Decoder 1 mention

ActiveMemo 0 mentions

Banana.dog back from the dead
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 ActiveMemo since Jun 2026.

Compare Cert Decoder VS ActiveMemo and see what are their differences

Base details

About Cert Decoder and ActiveMemo

Features and specs

Analysis

Category popularity

Questions & Answers

What's the story behind your product?

Which are the primary technologies used for building your product?

How would you describe the primary audience of your product?

Why should a person choose your product over its competitors?

Who are some of the biggest customers of your product?

What makes your product unique?

User comments

Social recommendations and mentions