Small utilities I built for problems I kept solving by hand.
No sign-ups, no tracking, nothing saved server-side. Pick one below.
8Tools
[ / ]
Subnet Calculator
Enter an IP and CIDR, get network range, broadcast address, usable hosts, and subnet mask instantly.
[ @ ]
DNS Lookup
Query A, AAAA, MX, TXT, NS, and CNAME records for any domain, resolved live in your browser.
[ $ ]
Linux Command Builder
Pick flags for common commands like find, tar, and rsync from a form, get the exact syntax to paste.
[ * ]
Cron Expression Builder
Build a cron schedule with plain-language controls and see the next ten run times before you save it.
[ {} ]
JSON / YAML Formatter
Paste either format, get it validated, pretty-printed, minified, or converted to the other.
[ # ]
Password Generator
Generate random passwords or passphrases with adjustable length, character sets, and entropy shown.
[ > ]
Log Analyzer
Drop in a log file and get error counts, timelines, and pattern grouping without writing a grep one-liner.
[ $ ]
Cloud Cost Calculator
Estimate monthly spend across common compute, storage, and network tiers for AWS, GCP, and Azure.