I Built 48 Free Online Tools That Never Touch a Server

I've been building a collection of free browser-based tools across 4 sites. Every tool processes data entirely in your browser using JavaScript — nothing is ever uploaded to a server. Why Browser-Only? Privacy — Your data never leaves your device Speed — No network latency, instant results Reliability — Works offline after first load Trust — Open source, verify the code yourself The Tools ToolBox Online — 18 Tools General-purpose tools for developers and everyone: Code Tools : JSON Escape/Unescape, GraphQL Formatter, TOML Formatter, Lua Beautifier, HTML to JSX Converters : Text to CSV, Pantone to Hex, IP to Hex, Hex to IP, Base64 Encode/Decode, JSON to YAML Calculators : Playback Speed, Geometric Progression, Combination Sum Generators : Random IP, Palindrome, UUID DevToolKit — 10 Tools Developer-focused utilities with higher complexity: TOML ↔ YAML conversion, SVG to JSX, SQL to MongoDB Cron Expression Generator, ENV File Generator, Nginx Config Generator Chmod Calculator, HMAC Genera