Developer Blog
In-depth technical guides, tutorials, and deep dives written by the Birhrt team. From JSON internals to cryptographic hashing — practical knowledge you can use today.
Understanding JSON: A Complete Developer Guide
Learn the fundamentals of JSON, its syntax rules, common pitfalls, and how it became the backbone of modern web APIs.
JWT Authentication Explained: How Tokens Work Under the Hood
Understand the internals of JSON Web Tokens — header, payload, signature — and learn how modern applications use them for stateless authentication.
SecurityMD5 vs SHA-256 vs SHA-512: A Developer's Guide to Cryptographic Hashing
Understand the differences between hashing algorithms, when to use each one, and why MD5 is considered broken for security purposes.
Data FormatsBase64 Encoding Demystified: When, Why, and How to Use It
Learn exactly how Base64 encoding works, why it increases data size by 33%, and the critical difference between encoding and encryption.
Text ProcessingMastering Regular Expressions: A Practical Guide with Examples
Go from regex beginner to confident user with practical patterns for email validation, log parsing, data extraction, and more.
PDFWorking with PDFs in the Browser Using Modern Web APIs
Learn how client-side PDF manipulation works — rendering, merging, splitting, and text extraction — all without server uploads.
DevOpsCron Expressions Explained: The Complete Scheduling Reference
Master the cron syntax for scheduling recurring tasks. Covers the five-field format, special characters, common patterns, and platform differences.
System DesignUUID v4 in Distributed Systems: Why Randomness Matters
Learn how UUID v4 identifiers work, why collisions are statistically impossible, and how to choose between UUID v4, v7, and alternatives like ULID.
PerformanceImage Optimization for the Web: Formats, Compression, and Best Practices
Reduce page load times by choosing the right image format, compression level, and delivery strategy. A practical guide to JPEG, PNG, WebP, and AVIF.
Web FundamentalsURL Anatomy: Understanding Every Component of a Web Address
Dissect URLs into their components — scheme, authority, path, query, and fragment — and learn how encoding, redirects, and canonical URLs work.
Explore our collection of 26+ free developer tools
Browse All Tools