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Mock Exam AI
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Tekadio
PrepAI offers a smart & easy test creation process backed by advanced AI algorithms. It helps you create quality exams, quizzes, and tests using an easy-to-use dashboard.

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, PrepAI should be more popular than Cert Decoder. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | prepai.io | certdecoder.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from India · 20 - 49 employees · 2021 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


🚀 PrepAI – AI-Powered Quiz & Assessment Generator PrepAI is your all-in-one platform to create quizzes, mock tests, and assessments in seconds using artificial intelligence. Whether you're an educator, corporate trainer, HR professional, or test-prep creator, PrepAI helps you save hours of...
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.


No analysis of PrepAI yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
What is an AI Question Generator? | PrepAI Exam Generator Overview
No Cert Decoder videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing PrepAI and Cert Decoder.
PrepAI's answer
PrepAI stands out for its ability to generate high-quality quizzes instantly from any input — text, documents, web URLs, or even audio. Unlike many tools that focus on MCQs alone, PrepAI offers a rich variety of question types, higher-order thinking alignment, structured test blueprints, and full mock test simulations. It also supports AI auto-grading, export to LMS formats, quiz embedding, and robust reporting — making it an end-to-end solution for assessments.
PrepAI's answer
PrepAI is designed to save time and maximize impact. It offers unmatched flexibility in quiz creation with support for multiple content formats, customizable test modes, and deep export options — including LMS-friendly formats. Its AI-driven grading, real-time analytics, and unique quiz multiplier feature make it ideal for both educators and organizations.
While many tools do one part of the workflow, PrepAI covers:
Creation
Delivery
Evaluation
Reporting
all in one platform.
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.
PrepAI's answer
PrepAI primarily serves:
Educators in schools and universities
Corporate trainers and L&D teams
HR professionals conducting hiring assessments
Test-prep creators building mock exams
EdTech platforms and LMS providers via API integration
These users value speed, customization, and quality in test creation and delivery.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
PrepAI's answer
PrepAI was created to solve a common but critical problem — the time-consuming and manual process of quiz and test creation. Born out of an edtech innovation lab, PrepAI was built to empower educators, trainers, and HR professionals with AI that can instantly convert content into test-ready questions.
What started as a prototype during the early adoption of AI in education has now grown into a full-fledged assessment platform used across schools, companies, and platforms globally.
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.
PrepAI's answer
Python (AI & NLP models)
Node.js (Backend APIs)
React.js (Frontend)
MySQL (Databases)
AWS (Cloud infrastructure)
Redis (Caching and session management)
Metabase (Analytics layer)
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.
Share your experience with using PrepAI and Cert Decoder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Wow, this is good. I think the question generation part can be better like this - https://prepai.io/. Source: over 3 years ago
I came across this tool online that can generate questions from text, pdf, video file, etc. Might check it out - https://prepai.in/ It is free forever, as in we can generate max. 3 times per day. Source: over 4 years ago
Generate your next question paper instantly on PrepAI - https://prepai.in/. Source: over 4 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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