Utility at your fingertips
All the tools you need, in one place.
IP Utility
ip.utilo.kr
IP Lookup, GeoIP, VPN Detection, Whois, DNS Lookup, Blacklist Check, CIDR Calculator
Salary Calculator
salary.utilo.kr
Calculate net monthly pay after insurance and tax deductions (2026 Korea)
Character Counter
char.utilo.kr
Count characters, words, bytes, lines, and paragraphs at once
Percent Calculator
percent.utilo.kr
Calculate percentages, ratios, and increase/decrease rates
Rent Conversion Calculator
rent.utilo.kr
Convert between jeonse and wolse, compare monthly rent by deposit ratio
VAT Calculator
tax.utilo.kr
Calculate VAT from supply or total, simplified taxpayer rates, net VAT payable
Date Calculator
date.utilo.kr
Duration between dates, add/subtract days, business days, D-Day counter
Age Calculator
age.utilo.kr
International & Korean age, zodiac, school enrollment year, birthday countdown