About Qortex Lab
Qortex Lab builds tools for people who test software.
Everything here is free, runs in your browser, and exists because it came out of work we were doing anyway.
Where these tools come from
Qortex Lab is a small studio founded by three QA practitioners, working in API testing, test automation and quality governance across distributed systems.
That background is why the first two tools are an API response validator and a test data generator rather than a PDF merger. It is the work we actually do.
That work has included national-scale digital identity platforms, AI-driven SaaS products, e-commerce systems, and distributed web, mobile, API and backend applications. Some platforms spanned more than twenty interconnected applications and services, where a wrong identity, signing or transaction value could become a production, security or compliance problem. The difficult part was rarely whether an endpoint returned 200; it was ensuring that data remained accurate and consistent across clients, APIs, databases and third-party systems.
The team holds ISTQB Foundation Level and Professional Scrum Master I certifications.
Why these tools exist
Most online utilities in this space are built by developers, for developers. They are usually fine, and they are usually missing the thing a tester would want.
A JSON Schema validator that reports one error at a time and stops. A test data generator that produces plausible names and valid emails but never an empty string, a right-to-left override, or an integer past what JavaScript can represent. Tools that are technically correct and practically incomplete, because whoever built them was not trying to break anything.
These are built from the other direction.
The API Response Validator warns about duplicate JSON keys and integers beyond 2^53. Both pass every validator we tested, while silently losing data before validation even runs. Neither is a schema violation, so no validator reports them, and both have cost teams releases.
The Test Data Generator has eight field types that exist only to produce values that break systems: boundary integers, boundary dates, right-to-left and zero-width strings, deliberate nulls and duplicates. Realistic data proves the system works when users behave as expected. That is not what production looks like.
Three commitments
Your data stays in your browser. Tools run client side. Nothing is uploaded, nothing is stored, and no account is needed for anything. Share links carry your configuration after the #, which browsers never send to a server.
This is not a promise about intent. An automated check fails our build if any tool makes a network call.
No dark patterns. No signup wall between you and a working tool. No email capture before a result. No artificial limits designed to sell you something.
The guides are written, not generated. Every tool carries a guide about the problem it addresses, written from experience rather than assembled from search results. If a guide says the tool does something, the tool does it. We have changed code to match a guide more than once.
The rest of Qortex Lab
We also build API Qortex, a platform for API testing and quality analysis, and Phoenix TestAI for test management and quality intelligence.
Qortex Tools is the free end of the same work.
Contact
Something wrong, something missing, or something you would like built? The contact form reaches us directly.
You can also email support@qortexlab.com.