Stack Online Tools – Developer Utilities

Productivity and developer tools with JSON formatter, text converters, password generator, SEO tools, and calculators.

The platform organizes its utilities into clearly defined categories, making it easy to find exactly what you need—whether it’s text processing tools like case converters, word counters, and diff checkers; encoding and security features such as Base64 utilities, hashing options, and QR code generators; or data-focused helpers for formatting, validating, and cleaning JSON or structured datasets. Developer Tools * JSON Formatter & Validator * JSON ↔ YAML Converter * Base64 Encoder / Decoder * URL Encoder / Decoder * JavaScript / CSS / HTML Minifiers * Robots.txt Generator 📝 Text & Content Tools * Case Converter (upper, lower, title, camel, snake, kebab) * Text Repeater * List Randomizer * Line Counter * URL Slug Generator * HTML ↔ Markdown Converter 🖼️ Image Tools * PNG ↔ JPG Converter (client-side) 🔐 Security Tools * Customizable Password Generator * Password Strength Checker 🧮 Calculators * Age Calculator (multiple modes) * Percentage Calculator 🌐 Additional Tools (launch web app) * Random Name Generator * Random Address Generator * PDF ↔ JPG Converter --- ✨ Key Features * Privacy-first: most tools run locally * No tracking or data collection * Fast, lightweight, and easy to use * Clean, modern UI * Offline support for client-side tools * Continually updated with new utilities 🔒 Privacy For browser-based tools, nothing is uploaded or stored—everything happens on your device. Tools requiring advanced processing open in the full web app for extended functionality.