Dev Toolbelt — JSON · Regex · Base64 · Color
Unknown author · Developer Tools
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Four dev tools in one popup: JSON formatter, regex tester, Base64 encoder, and color converter. Pro adds diff viewer + palette gen. Dev Toolbelt puts four essential tools in your browser toolbar — no tabs, no context switching. 📋 JSON Formatter Paste messy JSON, get instant pretty-print. Format, minify, or validate with one click. Syntax errors highlighted in red. 🔍 Regex Tester Write a regex, enter test strings, see every match with captured groups. Live validation as you type. Perfect for debugging patterns before they hit production. 🔤 Base64 Encoder Encode and decode strings in both directions. Handles Unicode cleanly. No more opening terminal for a quick base64 conversion. 🎨 Color Converter Convert between HEX, RGB, and HSL instantly. Live color preview updates as you type. Built-in picker for grabbing any color from your screen. Why Dev Toolbelt? These are the four tools every developer reaches for 20 times a day. Now they're one click away in your browser toolbar — lightweight, offline, no account required. The core tools are free forever. A one-time Pro upgrade adds batch processing and export. Free. No account. No bloat.