I got tired of using 10 different dev tools, so I built my own

Stop for a second. How many tabs do you have open right now? Go ahead. Count them. If you're a developer mid-debugging session, I'm willing to bet at least three of those tabs are some flavour of "free online tool." A Base64 decoder. Probably jwt.io. Maybe a UUID generator you googled five minutes ago and will never find again. I know, because I was you. For years. The tab graveyard You're deep in a debugging session. An auth token isn't decoding right. You need to check the JWT claims, fast. So you open a new tab and type "jwt decoder online." The page loads. There's a cookie banner. You dismiss it. A newsletter popup slides in. You close it. There are two ad columns flanking the actual tool, which is crammed into a narrow centre lane like it's embarrassed to exist. You get your result. You close the tab. Ten minutes later you need to check a timestamp. You don't have the tab anymore. You google again. Different site. Same experience. This is not a workflow. It's a punishment. The pro