Free Online Developer Tools
JSON formatter, Base64 encoder, UUID generator, password tools and more. All run in your browser — nothing is sent to any server.
JSON
3Encoding
6Generators
6Code
8Text
5Why Developers Choose DevWithTools
Instant Results
Every tool runs in your browser. No server round-trips, no waiting.
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30+ Tools
JSON, encoding, generators, code formatters, text tools, and more.
Developer Guides & Tutorials
Learn how the tools work under the hood
What Is JSON and How to Format It
JSON syntax, formatting, validation, and common errors explained.
Base64 Encoding Explained
How Base64 works, why it exists, and when to use it.
How to Create Strong Passwords
Password entropy, generator best practices, and security tips.
Hash Functions: SHA-256, MD5 Explained
Which hash algorithm to use and when — a practical guide.
UUID Guide: v1, v4, v7 Explained
What UUIDs are, the different versions, and when to use them.
Regex Guide for Developers
Patterns, syntax, flags, and real-world regex examples.