Blogs in Coding Tools

JSON Formatter & Validator: A Practical Guide for Developers (2026)

Format, validate, and debug JSON in seconds. Learn the most common JSON errors, how to fix them, and how to convert JSON to TypeScript or CSV — with a free browser-based tool that never uploads your data.

UUID Generator: A Developer’s Guide to v1, v4, v7 and When to Use Each

Sequential IDs leak data and break in distributed systems. Learn the differences between UUID v1/v4/v7, when to pick which, and generate them instantly in your browser — no library required.

Unix Timestamp Converter: Decode Epoch Seconds, Milliseconds, and ISO Dates

A timestamp like 1735689600 tells you nothing at a glance. Convert epoch seconds, milliseconds, or nanoseconds to readable dates (and back), in any time zone, instantly.

Base64 Encoding Explained: When to Use It, When to Skip It, and How to Decode Anything

Base64 turns binary data into ASCII text — handy for data URIs, JWTs, and email attachments, useless for "encryption". Learn the real use cases, the 33% size overhead trap, and decode anything in seconds.

String Escaper: Quote, Embed, and Sanitize Strings Across JSON, HTML, SQL, and JS

A stray quote can crash your build or open an XSS hole. Escape strings safely for JSON, HTML, JavaScript, SQL, Java, Python, and shell — in one tool, no chance of forgetting an edge case.

HTML Entity Encoder / Decoder: Display Special Characters Safely on the Web

Want to show a literal < or © or — on a web page without breaking the HTML? Encode and decode HTML entities in one click, including the full named-entity table and numeric references.

JWT Debugger Guide: Decode, Inspect, and Debug JSON Web Tokens Safely

JWT auth bugs are the worst kind — silent and hard to reproduce. Learn the structure of a JWT, the claims you should check first, and how to decode tokens without leaking them to a third-party server.

Cron Expression Generator: Build, Translate, and Test Cron Jobs Visually

Cron syntax is unforgiving — one wrong asterisk and your backup runs every minute instead of every night. Build expressions visually, see the next 5 runs, and stop guessing what `*/15 9-17 * * 1-5` actually means.

SQL Formatter: Make Any Query Readable in One Paste (Postgres, MySQL, BigQuery)

A 500-character single-line SQL string is where bugs hide. Beautify any query with proper keyword casing, indentation, and JOIN alignment — works for Postgres, MySQL, SQLite, BigQuery, and Snowflake dialects.

Regex Tester Guide: Learn Regular Expressions With Live Match Highlighting

Regex stops being scary once you can see it match. Test patterns live, get plain-English explanations of what your regex actually does, and copy battle-tested patterns for email, URL, and date validation.

Diff Checker: Compare Code, Config, and Text Side-by-Side (Privately)

When two files look identical but only one works, you need a diff. Compare any two text or code blocks side-by-side, with line-level and word-level highlighting — without uploading sensitive code anywhere.