Work Smarter.
Powerful Chrome extensions to monitor marketplaces, debug web apps with AI, and enhance your browsing experience. Free, privacy-focused, and built for developers.
Powerful Tools for Every Need
From marketplace monitoring to AI-powered debugging and dark mode browsing, we build Chrome extensions that make your life easier.
UX Replay
Record Sessions, Capture Errors, Get AI Bug Reports
- Session Replay
- Console Errors
- Network Monitoring
Marketplace Monitor
Never Miss a Deal on Facebook, Kijiji & Craigslist
- Instant Notifications
- Advanced Filters
- Frequent Checks
Universal Dark Mode
One-Click Dark Mode for Any Website
- Universal Compatibility
- Reduce Eye Strain
- Save Battery
Built with Developers in Mind
Quality extensions that respect your privacy, perform blazingly fast, and cost nothing to get started.
Privacy First
All our extensions run locally in your browser. Your data stays on your device. No tracking, no ads, no third-party analytics.
Lightning Fast
Optimized for performance. Minimal resource usage. Instant responses. We build tools that feel native to your browser.
Open Source
Transparent code you can audit. Community-driven development. No vendor lock-in. Fork, modify, and contribute on GitHub.
Free Forever
Generous free tiers with no time limits. Optional premium features if you need them. No credit card required to get started.
Up and Running in Three Steps
From installation to your first deal alert in under two minutes.
Install the Extension
Add Marketplace Monitor to Chrome in one click. No account required to get started.
Set Your Keywords
Configure what you're looking for — items, price limits, and which cities to monitor.
Get Notified Instantly
Receive Telegram alerts the moment matching listings appear. Be first to grab the deal.
Loved by Developers & Deal Hunters
See what our users are saying about our Chrome extensions.
“Found an Aeron chair for $300 within an hour of setting up my keywords. The Telegram alerts are lightning fast — I was first to reply and got the deal!”
Alex R.
Toronto
“UX Replay saved me hours of debugging. The AI bug reports are incredibly detailed — it caught a race condition I'd been hunting for days. Game changer for remote teams.”
Jessica L.
San Francisco
“Universal Dark Mode works on every site I visit. My eyes don't hurt after long coding sessions anymore. The auto-enable feature is perfect for my night workflow.”
Marcus T.
Seattle
“I monitor 3 platforms across 2 cities for camera gear. This extension saved me from having to check each site manually every hour. Total game changer.”
Sarah M.
Vancouver
“The session replay with console errors is brilliant. I can finally see exactly what users experienced when they hit bugs. No more 'works on my machine' excuses.”
David K.
Austin
“I enable dark mode on every site now — documentation, GitHub, everything. Battery life improved on my laptop, and it's so much easier on my eyes during meetings.”
Emma W.
Portland
Built for Productivity & Savings
mkpl.com creates Chrome extensions that solve real problems. From finding the best deals on marketplaces, to debugging production issues faster, to protecting your eyes with universal dark mode — we build tools that make your life easier.