Developer Tools
Essential utilities for developers — JSON formatter, Base64 encoder, UUID generator, color converter, and more.
All Developer Tools tools
JSON Formatter
Format, validate, and minify JSON data with syntax highlighting.
UUID Generator
Generate UUID v4 and v7 identifiers instantly.
Sheet Backend
Turn any Google Sheet into a REST API database backend.
Color Converter
Convert colors between HEX, RGB, and HSL values.
Base64 Encoder/Decoder
Encode and decode Base64 strings instantly.
HTML Formatter
Format, minify, and validate HTML code with syntax highlighting.
CSS Formatter
Format, minify, and validate CSS with syntax highlighting and error detection.
Regex Tester
Test and debug regular expressions with live matching and explanation.
Diff Checker
Compare two texts and highlight differences line by line.
URL Encoder/Decoder
Encode and decode URLs, query strings, and special characters.
JWT Decoder
Decode and inspect JWT tokens — header, payload, and signature.
SQL Formatter
Format and beautify SQL queries with configurable indentation and case.
Code Formatter & Minifier
Format, minify, and validate code in JavaScript, Python, HTML, CSS, SQL, and more.
SHA-256 & Crypto Hash Generator
Compute cryptographic checksums (SHA-256, SHA-512, SHA-1, MD5) for text and files locally.
Cron Expression Parser & Explainer
Parse, validate, and convert standard 5-part and 6-part cron expressions into human-readable schedules.
Unix Epoch Timestamp Converter
Convert Unix timestamps (seconds & milliseconds) to human dates, UTC, and ISO-8601 strings.
Meta Tag Generator & SERP Previewer
Generate SEO meta tags with live Google Mobile SERP, OpenGraph, X Card, and AI citation previews.
Zero-Upload Security Architecture for Developers
Pasting production JSON payloads, database connection strings, JWT authorization tokens, or proprietary SQL queries into public cloud utilities represents a critical security and compliance hazard. NumanX Developer Tools eliminates this risk entirely through a zero-upload client-side architecture.
All formatting, AST parsing, regex evaluation, Base64 encoding/decoding, and cryptographic hashing (SHA-256, SHA-512, HMAC) execute inside an isolated browser sandbox. Your authentication keys, sensitive customer records, and system schemas never leave your machine, satisfying GDPR, SOC2, and HIPAA compliance mandates.