A free toolkit for Linux server admins and developers. Calculators and generators for permissions, cron jobs, networking and more — all run instantly in your browser.
Convert Linux file permissions between octal, symbolic and binary.
See the default file and directory permissions any umask produces.
Build cron schedules visually and get a plain-English description.
IPv4 CIDR breakdown — network, broadcast, host range and masks.
Create strong, crypto-random passwords for root, SSH and databases.
Build 301/302 rules for Apache .htaccess and Nginx.
Encode or decode Base64 and URL strings, UTF-8 safe.
Inspect a JSON Web Token's header, claims and expiry.
Preview the next times a cron expression will fire.
Create bcrypt/SHA-1 credentials for basic auth.
Generate server blocks and VirtualHosts with PHP-FPM.
Beautify, validate and minify JSON instantly.
Convert epoch time to dates and back, local + UTC.
Live word, character and reading-time counts.
MD5, SHA-1, SHA-256 and SHA-512 of any text.
Turn any URL or text into a downloadable QR code.
Generate random v4 UUIDs in bulk.
Design linear/radial gradients with live preview.
Build a valid robots.txt to control crawlers.
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