Free online tools, no sign-up, no nonsense.

A small, fast collection of developer and everyday utilities that run entirely in your browser. Nothing you type is ever uploaded to a server.

All tools

Data & Encoding

🧩JSON FormatterValidate, beautify and minify JSON 🔤Base64 Encode/DecodeUTF-8 safe base64 conversion 🔗URL Encode/DecodePercent-encode or decode strings 📊CSV ⇄ JSONConvert between CSV and JSON 🪪JWT DecoderDecode JSON Web Token header & payload

Security & Generators

🔐Password GeneratorCryptographically secure passwords 🧮Hash GeneratorSHA-1 / SHA-256 / SHA-384 / SHA-512 🆔UUID GeneratorBulk-generate UUID v4 identifiers

Text

📝Word CounterWords, characters, reading time 🔡Case ConvertercamelCase, snake_case, Title Case… 🔍Text Diff CheckerCompare two blocks of text 🎯Regex TesterTest patterns against sample text 📄Lorem Ipsum GeneratorPlaceholder text generator

Time & Design

⏱️Timestamp ConverterUnix timestamp ⇄ human date 🎨Color ConverterHEX / RGB / HSL + contrast checker

Why nex9?

Most "free tool" sites bury a simple utility under trackers, pop-ups and multi-second ad-load delays. nex9 tools are static pages that do one job well: everything runs client-side in JavaScript, so your data never leaves your browser and the tools work even on a slow connection. No accounts, no email walls, no dark patterns.

Privacy: None of the tools on this site upload, log, or transmit the data you enter. Basic, privacy-respecting page-view analytics may be used to understand which tools are useful — see the privacy policy for details.