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 ·
A Linux MM Patch Set Shows Up to 12.8x Gains in gup_test
Meta engineer Rik van Riel has RFC patches letting follow_page_mask return more than one page per call. The kernel gup_test benchmark shows up to 12.8x improvement.
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Sysadmin ·
Nvidia Lines Up 500 Billion Dollars to Finance AI Buildout
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Dev ·
OpenAI Ships a ChatGPT Desktop App for Linux, With Codex
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Sysadmin ·
QEMU 11.1 Adds UFS Write Booster and Big Endian RISC-V
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Sysadmin ·
Linux Patches Bring Hybrid Graphics to 2018 MacBook Pros
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Sysadmin ·
LACT 0.10 Adds NVIDIA PowerMizer and Blackwell Hotspot
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Sysadmin ·
Linux 7.2 Reverts the Fair DRM Scheduler Back to FIFO
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.