Developer Tools & Extensions

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Premium Chrome extensions, production-ready templates, and 100+ free developer tools — built for people who ship.

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Production-grade software that pays for itself in the first week.

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ResellBuddy

Poshmark & Mercari automation Chrome extension. Save 2+ hours daily on sharing, liking, and following.

$9 /month
  • Auto-share listings to parties
  • Auto-like & auto-follow
  • Smart scheduling & cooldowns
  • Analytics dashboard
  • Mercari support included
Subscribe Now
🔧

Chrome Extension Starter Kit

Production-ready Manifest V3 template with payment integration, dark theme, and build scripts.

$49 one-time
  • Manifest V3 architecture
  • ExtPay payment integration
  • Dark theme popup & settings
  • Content scripts boilerplate
  • Build & packaging scripts
Get Starter Kit
📦

DevTool Box Source Code

Full source code for our 4-in-1 developer tools Chrome extension. Learn, customize, and reskin.

$29 one-time
  • Color Picker tool
  • Font Identifier
  • CSS Inspector
  • Screen Ruler
Get Source Code

Free Extensions

Chrome extensions,
on the house.

Open-source tools used by thousands of developers. Install and go.

🧪

JSON Hero

Beautiful JSON viewer & explorer

Open Source 📈

SEO Booster

SEO meta tag viewer & editor

Free 📌

TabSaver

Smart tab manager & session saver

Open Source 🔗

Link Checker

Find broken links on any page

Free 🍪

Cookie Editor

View, edit & manage cookies

Free ⚡

Speed Analyzer

Performance grading & insights

Free 🧰

DevTool Box

4-in-1 developer tools extension

Free Tier 🔄

ResellBuddy

Poshmark automation, free tier

Free Tier

100+ Free Tools

JSON formatters, regex testers, gradient generators, diff checkers, and way more — all free, no signup, no tracking.

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Open source
100+ GitHub repos