One place for everything I make
Reels and long-form videos, deep dives, guides you can follow end to end, and tools you'll actually keep open in a tab.
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From the blog
The kind of explanation you wish you'd found the first time you Googled it.
NetworkingWhy localhost has two addresses
Type localhost and you usually hit 127.0.0.1. Sometimes you hit ::1 instead, your app works in one terminal and dies in another, and nobody tells you why. Here's the actual reason.
Jun 19, 2026 · 9 min read
System DesignHow Stripe actually works
Your card gets charged in under a second, across half a dozen systems, in a way that survives a server dying mid-payment. I traced one $20 charge from click to settlement.
Jun 14, 2026 · 14 min read
System DesignHow Discord serves millions of messages a second
One channel, a hundred thousand people typing at once. Discord stores it in a data model most tutorials tell you never to build. Here's why it holds up.
Jun 9, 2026 · 13 min read
Tools you'll keep in a tab
Fast, free, no sign-up. Everything runs in your browser — nothing gets uploaded anywhere.
JWT Decoder
AuthPaste a token, see the header, payload, and whether the signature checks out. Nothing leaves your browser.
JSON Formatter
DataPretty-print, minify, and validate JSON. Catches the trailing comma before your API does.
UUID Generator
Datav4, v7, and bulk generation. Copy one or a thousand without leaving the page.
Regex Tester
TextLive match highlighting with a plain-English breakdown of what each group is doing.
Base64 Encoder
DataEncode and decode text, files, and data URIs both directions, instantly.
Color Picker
DesignPick a color and get HEX, RGB, HSL, and OKLCH at once, with contrast scores against any background.
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