Practical browser-based tools for daily debugging
Developer Debug Tools exists to make small but frequent technical checks faster: paste a payload, inspect the result, copy what matters, and move on with the investigation.
Built around real debugging work
The site focuses on everyday problems: formatting JSON, inspecting JWTs, decoding Base64, testing regex patterns, converting timestamps, reading logs, and preparing API notes for teammates.
Browser-based where practical
Many tools run directly in the browser so common payload checks do not need an account, installation, or unnecessary upload to a separate application backend.
Useful for technical teams
Backend developers, frontend developers, analysts, testers, and support engineers can use the same small utilities when investigating API responses, tickets, logs, and integration data.
Who maintains this site?
Developer Debug Tools is maintained by Ali Aygör. The project focuses on small, reproducible checks for API payloads, network captures, logs, tokens and configuration. The maintainer shares practical guides and reproducible examples.
Examples, limitations and corrections
Guides include synthetic examples that can be reproduced with the tools. Updated dates reflect content revisions. Browser-side inspection is deliberately distinguished from signature verification, database execution and full API compatibility testing. Tools use open-source libraries where appropriate; the site does not claim to have invented the underlying formats or algorithms.
Report an incorrect example or result through the contact page with a small redacted fixture, expected behavior and browser version. Active credentials and private customer data should not be included.
Why this site exists
Debugging often starts with simple questions: is this JSON valid, what does this token contain, which timestamp is this, why does this API response look wrong, or which log line carries the correlation ID? Those checks should be fast and easy to repeat.
The goal is not to replace full IDEs, API platforms, or observability tools. The goal is to provide focused utilities that help technical teams clean, inspect, and explain data during real work.