#guides

Understand the three parts of a JWT, how signing works, and why you should never store sensitive data in tokens — plus decode any JWT instantly.

Understand percent-encoding, reserved characters, and why your URLs break — then fix them instantly with the right tools.

Learn what Base64 encoding actually does, when to use it, and when not to — plus encode and decode strings and images instantly.

Understand the cryptography behind SSH keys and generate a secure key pair directly in your browser — no terminal required.

Edit, annotate, merge, split PDFs entirely in your browser — nothing uploaded to any server.

Visual CSS generators for gradients, shadows, animations, and clip-paths — all free.

Compare Nginx and Apache configuration — performance, security, and generator tools.

Understand WCAG contrast ratios, AA vs AAA compliance, and how to test your colors.

Environment variables done right — validation, best practices, and common mistakes.

Master JSON manipulation with practical tips — from key sorting to schema validation.

Essential security tools for generating keys, HMAC signatures, CSP headers, and more.

Master JSON-to-TypeScript, Go, Python, CSV, YAML and more with this comprehensive guide.

Compare CSS gradient, grid, flexbox, animation, and shadow generators to find the right fit.

A curated list of 20 developer tools that will streamline your daily workflow.

A beginner-friendly visual guide to mastering regular expressions with practical examples.

Everything you need to know about Base64 encoding — when to use it, how it works, and common pitfalls.

Discover the 10 most essential JSON tools every web developer should have bookmarked.

Explore why free browser-based developer tools are essential in 2026 and how they boost productivity.