Cert Decoder VS Tatastu.dev

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	Tatastu.dev
Website	certdecoder.com	tatastu.dev
Pricing	Free	Paid Free trial $16.67 / Monthly Official pricing
Platforms	Web	—
Company	—	2026
Listed in	SSL Certificates Decoding Website Monitoring Monitoring Tools +1	AI Coding Developer Tools Code Editor AI Coding Vibe Coding AI Code Generation Productivity Design Tools Tech Web App +8

About Cert Decoder and Tatastu.dev

In their own words, as submitted to SaaSHub.

Cert Decoder

Tatastu.dev

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

Tatastu.dev 2 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.

Unable to verify
I don't have reliable information about a website called Tatastu.dev in my knowledge base, so I cannot confirm its actual features or offerings. The pros listed here are speculative and should not be treated as factual.
Developer-focused domain
The .dev top-level domain suggests the site is likely aimed at developers or software-related content, which may indicate technical resources or tools; however, this is an inference based on the domain name only.

Analysis

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

Cert Decoder

Tatastu.dev

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

Tatastu.dev appears to be a niche or lesser-known developer-focused platform, but there is insufficient verifiable public information to confirm its reliability, feature set, or reputation, so it should be approached with caution until independently verified.

Why this product is good

Limited publicly available reviews or documentation make it difficult to assess quality and reliability.
As a .dev domain, it likely targets developers, suggesting a technical or coding-related tool or resource.
No widespread community feedback or established track record could be found to confirm consistent performance.
Lack of transparency regarding the team, company, or support structure behind the service raises questions about accountability.

Recommended for

Developers willing to experiment with new or niche tools before mainstream adoption.
Early adopters comfortable testing unverified platforms and providing feedback.
Users who conduct their own due diligence, such as checking source code, security practices, and community discussions before relying on it for critical projects.

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

Tatastu.dev

100% 100%

Monitoring Tools

0% 0%

Productivity

100% 100%

Website Monitoring

0% 0%

100% 100%

Questions & Answers

As answered by people managing Cert Decoder and Tatastu.dev.

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.

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

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.

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.

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.

User comments

Share your experience with using Cert Decoder and Tatastu.dev. 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

Tatastu.dev 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 Tatastu.dev since Jul 2026.

Compare Cert Decoder VS Tatastu.dev and see what are their differences

Base details

About Cert Decoder and Tatastu.dev

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?

User comments

Social recommendations and mentions