Tools
Everything here runs in your browser. No account, no upload, no server round-trip — and each one shows its working so you can check it against the official source.
Visa eligibility checker
Screens your education, experience, income, age and Korean level against eleven visa categories, and scores an F-2-7 points-based residence application on the 170-point scale with a plan to close the gap.
Open →Foreigner tax calculator
The 19% flat-tax election against ordinary progressive taxation: net pay, effective rate, social insurance broken out, and the salary at which the election starts to pay off.
Open →Korean address romanizer
Hangul in, official English address out — in courier format, single-line format and field-by-field for checkout forms. Implements the road-name romanization standard, not generic transliteration.
Open →English name to Hangul
Any Latin-script name in Korean, with a block-by-block pronunciation guide. Curated spellings for common names, a loanword-orthography rule engine for the rest.
Open →How these are built
All four are rule-based. Nothing here calls a language model, guesses, or personalises an answer — the same
inputs always produce the same output, and the rules live in versioned data files you can read:
data/f27-points.json, data/visa-requirements.json,
data/tax-rates.json and data/popular-names.json. Each carries the authority it came
from and the date it was last reviewed.
That matters because the underlying rules move. The F-2-7 scoring table is re-issued by ministerial notice. Tax brackets and the health insurance rate change every January. When a number here is stale, the fix is a one-line data edit rather than a rewrite — and the review date on each tool tells you how much to trust it in the meantime.
Privacy
Nothing you type is transmitted anywhere. Calculations happen locally in JavaScript, and the only thing stored is your form input, kept in your own browser's local storage so a half-finished calculation survives a reload. Clearing your browser data removes it. See the privacy policy for the full picture, including what our advertising partners collect.