Linux Admin Toolkit
Linux administrators keep servers running, manage user accounts, automate tasks, and troubleshoot issues across fleets of machines. While the terminal is home, a browser-based toolbox provides a convenient second screen for the quick tasks that do not need a full SSH session. These free tools run client-side — your data stays in the browser.
Crontab Calculator
Validate cron expressions before adding them to /etc/crontab or user crontabs. See the next ten execution times in plain English to prevent the classic off-by-one scheduling mistake that wakes you up at 3 AM.
RegExp Tester
Build and test regex patterns for grep, sed, and awk commands. Live highlighting shows matches before you run a destructive sed -i command on production log files.
Code Diff Tool
Compare configuration files — /etc/ssh/sshd_config, /etc/nginx/nginx.conf, /etc/fstab — before and after changes. Faster than diff when you want a clean visual comparison to paste into a change ticket.
Base64 Encoder / Decoder
Decode Base64-encoded certificates, SSH keys, and authentication tokens. Encode binary data for embedding in shell scripts, systemd unit files, or Ansible playbooks.
MD5 / Hash Generator
Generate MD5, SHA-256, and SHA-512 hashes for verifying ISO images, package checksums, and configuration file integrity. Essential for validating downloads and change management.
JSON Formatter & Validator
Pretty-print JSON output from journalctl --output=json, cloud API calls, and monitoring tool APIs. The formatted view makes structured logs readable without piping through jq.
Timestamp Converter
Convert Unix epoch timestamps from system logs, stat output, and /proc filesystem entries to human-readable dates. Essential for correlating events across servers in different time zones.
Password Generator
Generate strong passwords for new user accounts, service accounts, and application configurations. Meets complexity requirements for PAM modules and enterprise password policies.
IP Address Lookup
Look up IP addresses from /var/log/auth.log, fail2ban bans, and iptables logs. Identify geographic origin and hosting provider for security investigations.
Hex Converter
Convert hex values from xxd dumps, file magic numbers, and binary log entries to readable ASCII. Useful for filesystem forensics and binary file analysis.
JSON to YAML Converter
Convert JSON configuration to YAML for Ansible playbooks, Docker Compose files, and cloud-init configurations. One click replaces manual reformatting.
User-Agent Parser
Parse user-agent strings from Apache and Nginx access logs to identify bots, crawlers, and suspicious clients. Helps fine-tune robots.txt and access control rules.