I Built a Free UptimeRobot Alternative That Runs Entirely in Your Browser

<p>I built a tool that answers one question: when a website won't load, is it your connection or the site? It runs two checks in parallel — measures your own line in the browser

<p>We've all been there. You get a Slack ping at 2am: "Is the site down?" You check UptimeRobot. It says: <strong>DOWN - HTTP 500</strong>. Great. But <em>what</em> was HTTP 500?

<h2> I got hit by a 4× price hike – so I built my own uptime monitor </h2> <p>In July 2025, my monitoring bill went from <strong>$8 → $34/month</strong>.</p> <p>Same service. Same

<p>I've been using UptimeRobot for years. It's free, it works, and nearly every developer I know uses it. So when I started evaluating alternatives, I wasn't expecting much of a

<p>Stop for a second. How many tabs do you have open right now?</p> <p>Go ahead. Count them.</p> <p>If you're a developer mid-debugging session, I'm willing to bet at least three

<p>Hey folks! 👋<br /> As a solo developer building for the global market, balancing performance, shipping speed, and server costs is always a tricky triangle. Recently, I launched

<p>As developers, we all have that exact same workflow. You get a massive blob of JSON from an API, or a JWT token from a staging environment, and you instinctively Google "JSON

<p>Hey DEV community! 👋</p> <p>As a developer and digital marketer, I got sick of using random, ad-stuffed websites every time I needed to quickly format JSON, calculate a margin,