From calculators and converters to text tools โ run the programs you use every day right in your browser. Nothing is sent to a server; everything runs locally in your browser.
Handle discounts, growth rates, and ratio calculations all at once.
Calculator โConvert length, weight, temperature, and volume units in real time.
Converter โGenerate a strong random password that follows secure rules.
Generator โA glossary of modern dating and dating-app slang like ghosting, breadcrumbing, situationship, and love bombing.
Text โEnter any IP address to instantly look up its country, region, city, ISP, and timezone.
Network โInstantly check your Body Mass Index (BMI) and weight category from height and weight.
Calculator โInstantly convert between cooking measurements โ cups, tablespoons (Tbsp), teaspoons (Tsp), milliliters (ml), and fluid ounces (fl oz) โ with this free measurement converter.
Converter โInstantly generate a QR code from a URL, text, or Wi-Fi info.
Generator โA free online hash generator that instantly calculates SHA-1, SHA-256, SHA-384, and SHA-512 hash values as you type.
Text โInstantly check your current public IP address, approximate location, and ISP.
Network โEnter your age to get your estimated maximum heart rate and target heart rate zones for warm-up, fat burn, cardio, anaerobic, and max-intensity training.
Calculator โConvert a Gregorian (solar) date to the traditional East Asian lunisolar calendar, or a lunisolar date back to the Gregorian date. Supports leap months and shows the sexagenary (gapja) cycle.
Converter โGenerate multiple UUID v4 values at once for development, plus random hex strings you can use as API keys or session tokens. Free, runs entirely in your browser.
Generator โ37 Korean chosung expressions, internet slang, and social media terms explained for learners, with the original Korean, romanization, and meaning.
Text โFrom web ports like HTTP (80) and HTTPS (443) to email ports like SMTP and IMAP, remote-access ports like SSH and RDP, and database ports like MySQL and PostgreSQL โ a full reference of commonly used port numbers.
Network โEnter your loan amount, annual interest rate, and term to compare the monthly payment and total interest for equal-payment and equal-principal repayment methods.
Calculator โEnter a reference city and time, and instantly see the local time in Seoul, New York, London, Tokyo, and other major cities around the world.
Converter โCombine an adjective and a noun to instantly generate a random nickname you can use for games, social media, and online communities. Free nickname generator.
Generator โ38 Korean proverbs and idioms explained for learners, with romanization, literal translation, and figurative meaning.
Text โHow the North American Numbering Plan structures a US phone number, what area code overlays mean for dialing, and how toll-free number prefixes actually work.
Network โEnter a principal, annual rate, investment period, and compounding frequency to see how much your money can grow through the power of compound interest.
Calculator โA free online tool to encode text to Base64, or decode a Base64 string back to plain text. Full Unicode support, including non-ASCII characters.
Converter โPick a race โ elf, dwarf, orc, or human โ and generate random fantasy character names for your novel, tabletop RPG, or video game. Free fantasy name generator.
Generator โ30 Korean four-character idioms explained for learners, with hanja, Korean reading, romanization, and meaning.
Text โThe practical difference between IPv4 and IPv6 addresses, why the internet is gradually running out of IPv4 addresses, and why most people never notice the transition happening.
Network โEverything runs in your browser on any device. No app to install and no account to create.
Values you enter into calculators and converters are processed locally and never sent to a server.
Each tool comes with how it works, the standards used, and common questions so you can understand the result.