Tools + answers for the people who keep things running
Your tech questions, answered in seconds.
Free, fast, browser-based tools for sysadmins, developers and security folks. No accounts, no uploads, no tracking your inputs. Plus field guides that give you the answer first and the theory after.
Latest news
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Dev ·
Cloudflare Puts Feature Flags in the Terminal With Wrangler
Cloudflare's Wrangler CLI now manages Flagship feature flags from the terminal, so you can create flags, flip kill switches, and roll back from CI or a script.
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Dev ·
Walden Robotics Exits Stealth With 300 Million for Robots
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Dev ·
EU Orders Google to Open Android and Search to AI Rivals
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Dev ·
NotebookLM Is Now Gemini Notebook, With a Cloud Computer
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Dev ·
SAP Buys Prior Labs to Lead Tabular Foundation Models
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Dev ·
Apple Overtakes Nvidia as World's Most Valuable Company
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Network ·
Japan Builds World's First National AI Factory With Nvidia
Flagship tools
All tools →Dev
AI Token Counter
Count tokens and estimate cost for GPT-5, Claude 4 and Gemini 3 before you call the API.
Runs in your browser
Dev
JSON to TypeScript
Turn any JSON payload into clean, typed TypeScript interfaces in one paste.
Runs in your browser
Sysadmin
tar Command Generator
Build, extract or list any tar archive by clicking, with every flag explained.
Runs in your browser
SEO
AI Crawler Blocker
Generate a robots.txt that blocks GPTBot, ClaudeBot and 20 other AI bots, plus Nginx and Apache rules.
Runs in your browser
By category
Developer tools
Decode, build and debug faster: JWT, cron, encodings and more.
Network tools
Subnets, DNS, IPs: the daily bread of network admins, done right.
Security tools
Passwords, TLS certificates and the things that keep you off incident calls.
Email & DNS tools
SPF, DKIM, MX and the plumbing behind deliverability.
SEO tools
Technical SEO checks that actually move rankings.
Sysadmin tools
Converters, calculators and cheats for people who run servers.