blog
guides & tutorials.
Practical guides for developer tools — from formatting and encoding to validation and conversion.
JSON Formatter & Validator: The Complete Guide
Learn how to format, validate, and debug JSON efficiently. Covers syntax, common pitfalls, best practices, and practical examples for daily development work.
Regex Tester & Debugger: The Complete Guide
Learn how to test and debug regular expressions effectively. Covers regex syntax, flags, character classes, group capture, and lookahead/lookbehind.
SQL Formatter & Beautifier: The Complete Guide
Learn how to format and beautify SQL queries for better readability. Covers formatting rules, indentation styles, and best practices for clean SQL.
Epoch / Unix Timestamp Converter: The Complete Guide
Learn how to convert Unix timestamps to human-readable dates and back. Covers epoch time basics, seconds vs milliseconds, timezone handling, and the Year 2038 problem.
HTML Preview / Sandbox: The Complete Guide
Learn how to use an HTML preview sandbox to rapidly prototype, debug, and test HTML, CSS, and JS code in real-time with workflow tips and examples.
URL Encoder & Decoder: The Complete Guide
Learn how URL encoding works, when to use encodeURI vs encodeURIComponent, and how to handle special characters safely in URLs and API calls.
Base64 Encoder & Decoder: The Complete Guide
Understand how Base64 encoding works, explore use cases like data URIs and JWT tokens, and learn best practices for binary-to-text encoding.
UUID Generator: The Complete Guide
Explore the differences between UUID v1, v4, and v7, learn when to use each version, and understand how UUIDs impact database index performance.
JSON to CSV Converter: The Complete Guide
Learn how to convert JSON arrays to CSV with nested object flattening, custom delimiters, and practical examples for data migration and analytics.
HTML Entity Encoder & Decoder: The Complete Guide
Learn how to encode and decode HTML special characters safely. Covers named and numeric entities, XSS prevention, and practical web development examples.
JWT Parser & Inspector: The Complete Guide
Learn how to decode, inspect, and validate JSON Web Tokens. Covers header, payload, claims, signature verification, and expiration validation.
Color Converter (HEX, RGB, HSL): The Complete Guide
Learn how to convert colors between HEX, RGB, HSL, and OKLCH formats. Covers color models, conversion math, use cases, and practical examples.
Text Diff Checker: The Complete Guide
Learn how to compare text with a diff checker. Covers diff algorithms, line-by-line comparison, ignoring whitespace/case, and practical examples.
HEX to HSL Converter: The Complete Guide
Learn how to convert HEX color codes to HSL and HSLA values. Covers the conversion formula, CSS usage, color theory, and practical examples for web developers.
Base64 Image Converter: The Complete Guide
Learn how to encode images to Base64 data URIs and decode them back. Covers data URI syntax, use cases, performance considerations, and examples.