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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Sysadmin ·
AMD Wants eSPI to Be Its Own Bus Type in the Linux Kernel
AMD posted patches on August 4 proposing eSPI as a new Linux bus type rather than an extension of the SPI subsystem, with an AMD driver as its first user.
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Network ·
C-Kermit 11 Ships, Fifteen Years After the Last One
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Sysadmin ·
The Linux Foundation Takes On the AI Bill Nobody Can Read
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Dev ·
Linux May Get a Process Builder Instead of fork()
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Dev ·
Apple Asks a Court to Freeze OpenAI's Hardware Work For Now
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Dev ·
Cloudflare Open Sources Its Internal Agent Workspace
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Dev ·
FEX 2608 Makes ARM Chips Idle Properly While Emulating x86
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.