I built a 4-in-1 dev tool Chrome extension — JSON, Regex, Base64, Color (just approved!)

After keeping 4 tabs pinned for tools I use every day, I merged them into a single Chrome extension popup. Google just approved v1.1.

What it does:

• JSON formatter/minifier with collapsible nodes
• Regex tester with live match highlighting and group extraction
• Base64 encoder/decoder (text only on free; file support on Pro)
• Color converter: HEX to RGB to HSL and back

300+ weekly active users on v1.0. v1.1 adds a Pro tier ($9.99 one-time) with a JSON diff viewer, Base64 file support, palette generator, and themes.

Everything is local, no accounts, no tracking. The popup loads in ~10ms.

Link