Dev Toolbelt — JSON · Regex · Base64 · Color

by theigoraraujo@gmail.com · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Four dev tools in one popup: JSON formatter, regex tester, Base64 encoder, and color converter. Pro adds diff viewer + palette gen.

Users

+1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#330K

#258K among extensions

Version

1.1.0

updated 23 Jul 2026

Users

monthly, 3 months

Latest, 15 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 months

Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Dev Toolbelt — JSON · Regex · Base64 · Color

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.