Every web tool you reach for,
all in one place.
No install, no login — right in your browser. Character count, byte size, reading time, UTM links, and receipt organizing, all in one spot.
Tools you can use right now
Search for what you need, or tap a card to start.
Character Counter
Instantly check the character and word count of essays, blog posts, and assignments.
UTF-8/SMSByte Calculator
See how many bytes your text takes and stay within submission limits.
ContentReading Time Calculator
Estimate how long a blog post, speech script, or announcement takes to read.
MarketingUTM Link Builder
Build UTM links to separate traffic sources for blog, social, and email campaigns.
Print/PDFReceipt A4 Organizer
Turn scattered receipt images into a single sheet ready to submit.
Job/ResumeResume Character Counter
Match each resume field's character limit with a real-time count of characters (with/without spaces) and how many remain.
UTF-8/EUC-KRKorean Byte Calculator
Compare how many bytes Korean text takes in UTF-8 versus EUC-KR at a glance.
Tax/BillingVAT Calculator
Split 10% value-added tax out of a supply amount or a gross total automatically.
Property/TaxCapital Gains Tax Calculator
Subtract expenses, the long-term holding deduction, and the basic deduction from a property gain, then apply progressive rates.
Payroll/InsuranceTake-home Salary Calculator
See your real monthly take-home pay after the four insurances and income tax are deducted from your salary.
Finance/RepayLoan Repayment Calculator
Calculate monthly payment and total interest by loan amount, rate, and term in two repayment modes.
HR/PayrollSeverance Pay Calculator
Estimate severance pay from your start/end dates and last 3 months of wages, based on average wage.
Text/EnglishCase Converter
Convert text to uppercase, lowercase, title, camelCase, snake_case, and more, instantly.
Security/ToolPassword Generator
Create strong random passwords right in your browser with adjustable length and character sets.
PDF/ConvertImage to PDF
Combine several JPG or PNG images into one PDF in your browser. No upload, no install.
Developer/TextJSON Formatter
Format, validate, and minify JSON instantly in your browser.
Everyday/DateAge Calculator
Enter a date of birth to get exact age and the days until the next birthday.
Welfare/PensionBasic Pension Eligibility Checker
Enter income and assets to estimate eligibility for Korea's Basic Pension against the 2026 threshold.
Tax/AssetsInheritance & Gift Tax Calculator
Estimate inheritance or gift tax by subtracting deductions and applying progressive rates.
Payroll/InsuranceHealth Insurance Calculator
Enter your monthly salary to calculate the 2026 employee health and long-term care premiums.
Health/EverydayBMI Calculator
Calculate your BMI (body mass index), its category, and the healthy weight range for your height. A simple starting point for weight awareness.
Shopping/EverydayDiscount Calculator
Work out the final price and your savings from an original price and discount. Stack a second discount to see the real effective rate.
Everyday/DiningTip Calculator
Split a bill fairly: enter the amount, tip percent, and party size to see the tip, total, and per-person share.
Math/EverydayPercentage Calculator
Find a percent of a number, a ratio, and a percentage change in one place — the three percentage calculations you use most, from discounts to tax to scores.
Finance/MathInterest Calculator
Calculate simple and compound interest, plus the total maturity value, from a principal, rate, and time. Useful for gauging savings or loan interest.
Date/EverydayDate Difference Calculator
See how many days, weeks, months, and years lie between two dates. Useful for countdowns, job tenure, and anniversaries.
Regional/HealthRegional Health Insurance Calculator
Estimate the 2026 regional (self-employed/retiree) health insurance premium from annual income and property.
Easy guides to everyday money
Plain-language guides to severance pay, take-home salary, and taxes — each linked to a free calculator you can use right away.
Counting Days That Actually Matter: Notice Periods, Deadlines & Tenure
The real problem isn't subtracting dates — it's counting them the way contracts, courts, and HR do. Learn the inclusive/exclusive, business-day, and month-end traps that cause costly mistakes, and check any span with the date difference calculator.
Read the guide →Tool guidesHow Much House Can You Afford? The 28/36 Rule Explained
The 28/36 rule turns your income into a realistic home budget in two steps. See how much monthly payment — and how big a loan — your income supports, why the interest rate changes everything, and the costs the rule hides.
Read the guide →Tool guidesHow to Calculate a Percentage (3 Ways, With Examples)
Learn how to find a percent of a number, what percent one number is of another, and percentage increase or decrease — with clear examples. Check your answer with the free percentage calculator.
Read the guide →Tool guidesPay Off Debt or Invest? A Clear Way to Decide
Have spare cash? Whether to pay down a loan or invest comes down to guaranteed vs uncertain returns — not just comparing two rates. Here's the framework, the traps, and how to run your own numbers.
Read the guide →Why people trust it
Fast, lightweight, and safe — the principles behind every tool.