Blog
Guides and how-tos for every tool on belun.app.
Character Count Online: Why It Matters and How to Do It Right A practical guide to character counting for social media, SEO, SMS, and coding — with tips on platform limits and how different tools count. JSON Formatting & Validation: A Developer's Practical Guide Why JSON formatting matters, common pitfalls, and how to validate JSON for free in your browser — no tools to install. How to Count Words Online for Free (and Why It Matters) A practical guide to word counting for students, writers, and developers — with tips on character limits, reading time, and more. URL Encoding Explained: When, Why, and How to Encode URLs A clear guide to percent-encoding — what it is, when you need it, and how to encode and decode URL strings for free in your browser. How to Calculate Triangle Area, Angles & Perimeter: Complete Guide Understand Heron's formula, the Law of Cosines, and triangle classification — with a free online calculator that shows all results instantly. Base64 Encoding Explained: What It Is and When to Use It A beginner-friendly guide to Base64 — how it works, real-world use cases, and how to encode or decode strings for free in your browser. DNS Records Explained: A, MX, TXT, CNAME, NS and How to Look Them Up A practical guide to DNS record types, what each one does, and how to query them instantly without installing any tools.