Why Every Developer Needs a Second Brain

Your notes belong to you... not a SaaS company's database. Obsidian is a markdown-native infinitely extensible tool where you can build what developer's dub a "second brain". Contents Free + private Password protection + encryption Turn your notes into a database Code Funsies Custom CSS The bottom line Supercharge with Claude + MCP Links to get started Free, local, and actually yours Obsidian is free for personal use . Your vault is just a folder of .md files on your machine. There's no proprietary format, no subscription required, no max and no limits. The "cloud" is growing, and our farmland is being replaced with data centers. I have iCloud which helps with my phone backup and makes it easy to setup new devices, but aside from that, I don't want my data on someone else's machine. It's inevitable on some level, but I like to do what I can to prevent it. I digress... for your Obsidian notes, you can back them up with git, sync with your own solution, or keep them entirely offline. You