Practical guides for common developer tools
Short, technical articles that explain how these tools work, where they fit in real debugging workflows, and what mistakes to avoid.
What is JSON Formatter and how to use it
Learn what a JSON formatter does, why valid JSON matters, and how developers use formatting during API debugging.
Base64 Encode/Decode explained
A practical developer guide to Base64 encoding, decoding, common use cases, and debugging mistakes.
URL Encoding explained
Understand URL encoding, percent escapes, query strings, and how to debug encoded URLs safely.
JWT Decode explained
Learn how JWT decoding works, what header and payload claims mean, and what decoding does not prove.
Regex basics for developers
A practical introduction to regular expressions for validation, extraction, log search, and text debugging.
Common JSON syntax errors and how to fix them
A practical guide to the JSON mistakes developers see most often: trailing commas, single quotes, comments, unescaped characters, and broken nesting.
How to debug API JSON responses
A developer workflow for inspecting API JSON responses, status fields, error objects, timestamps, IDs, and nested payloads.
Why formatting SQL queries helps debugging
Learn how SQL formatting makes long queries easier to review, compare, optimize, and explain during backend debugging.
Unix timestamp explained for developers
Understand Unix timestamps, seconds vs milliseconds, timezone display, and common API or log debugging mistakes.
How to prettify application logs for debugging
A practical workflow for cleaning log output, extracting stack traces, formatting JSON logs, and sharing useful debugging notes safely.
How to format JSON online
A practical guide to formatting JSON in the browser, validating payloads, and sharing readable API examples safely.
How to decode a JWT token
Learn how to decode JWT header and payload claims in the browser, read exp and iat values, and avoid common token mistakes.
How to convert Unix timestamp to date
Convert Unix seconds or milliseconds into readable dates and understand timezone differences in API logs and JWT claims.
How to encode and decode Base64
Understand Base64 encoding, decode strings safely in the browser, and connect decoded output to JSON, JWT, and file workflows.
How to Analyze HAR Files for API Debugging
A practical workflow for reading HAR files, finding slow requests, spotting 4xx/5xx failures, and sharing safe network summaries.
How to Read Java Stacktraces and Find Root Causes
Learn how to identify Caused by chains, application frames, framework noise, and the line of code most likely responsible for a Java failure.
Common JWT Security Mistakes Developers Should Avoid
A developer checklist for JWT algorithms, expiry, issuer, audience, signature verification, token storage, and safe debugging.
How to Detect Breaking Changes in OpenAPI / Swagger Files
A practical review process for comparing OpenAPI specs and identifying endpoint, method, response, and schema changes that can break clients.
SQL Query Debugging Checklist
A checklist for formatting SQL, finding dangerous updates, checking joins, reviewing filters, and preparing safer database debugging sessions.
How to Debug API Logs Using Correlation IDs
Use request IDs, trace IDs, and correlation IDs to connect API failures across logs, HAR files, stacktraces, and service boundaries.
Cron Expression Examples for Developers
Common cron examples for developer jobs, backups, reports, retries, and operational schedules, with cautions about timezone behavior.
JSON Schema Validation Explained
Understand how JSON Schema describes payload shape, required fields, types, arrays, objects, and practical API validation limits.