Developer Blog
Practical guides and tutorials on the tools and techniques developers use every day. Written and reviewed by developers, each article explains a concept clearly, shows real examples, and links to the free browser-based tools you can use to try it yourself.
We cover working formats like JSON, CSV, YAML and XML; encoding and decoding with Base64, URL and HTML entities; authentication topics such as JWT, bcrypt and hashing; regular expressions; UUIDs and unique identifiers; Unix timestamps and date handling; and the everyday text, color and generator utilities that speed up frontend and backend work. Every guide is free to read, needs no signup, and pairs with a private, in-browser tool so you can go from reading to doing in a single click.
SHA-256 Hashing Explained for Developers
A developer's guide to SHA-256 cryptographic hashing — how it works, when to use it, and common applications.
Regular Expressions: A Practical Developer Tutorial
Master regex patterns with practical examples for email validation, URL matching, and common developer use cases.
Converting Between CSV and JSON: A Complete Guide
Learn how to convert CSV to JSON and JSON to CSV with practical examples, edge cases, and browser-based tools.
What is JSON? A Beginner's Guide with Examples
JSON is the lightweight, text-based data format that powers web APIs and config files. Learn what JSON is, its syntax, and how to use it, with clear examples.
What is a CSV File? Format, Uses & Examples
A CSV file stores tabular data as plain text with comma-separated values. Learn what CSV is, how the format works, its pros and cons, and how to open one.
What is a Unix Timestamp? Epoch Time Explained
A Unix timestamp counts the seconds since January 1, 1970 UTC. Learn what epoch time is, why computers use it, and how to convert timestamps to dates.
What is JWT? How to Decode and Inspect JWT Tokens
Learn what JSON Web Tokens (JWT) are, how they work, and how to safely decode and inspect them without needing a backend.
JSON Formatting: A Complete Developer Guide
Everything you need to know about JSON formatting, validation, and best practices for clean, readable JSON data.
Understanding Base64 Encoding and Decoding
A practical guide to Base64 encoding — what it is, when to use it, and how to encode and decode in the browser.
What is a UUID? GUIDs, Versions & When to Use Them
A UUID is a 128-bit identifier that is unique across space and time without a central authority. Learn what UUIDs are, their versions, and when to use them.
What is URL Encoding? Percent-Encoding Explained
URL encoding replaces unsafe characters with percent codes so text is safe in a URL. Learn what URL encoding is, why it exists, and how percent-encoding works.