Utility Tools

Calculate monthly payments and interest for equal payment and equal principal methods.

Compare equal payment and equal principal repayment methods with monthly payments, total interest, and amortization schedule.

Calculate net salary after deductions for 4 major insurances and taxes (Korea).

Calculate your remaining balance and savings rate by entering your monthly income and expenses.

Calculate your Body Mass Index (BMI) and check your health category. Supports both metric and imperial units.

Calculate your Basal Metabolic Rate using the Mifflin-St Jeor Equation. Check your daily calorie needs by activity level.

Calculate your body fat percentage based on BMI method and check your health category. Enter your gender, age, height, and weight to calculate body fat percentage.

Calculate your daily recommended calorie intake (TDEE). Uses the Mifflin-St Jeor Equation to estimate BMR and daily energy expenditure.

Dream interpretation search tool. Find meanings of dreams by keywords like water, snake, money, and more.

Calculate your Four Pillars of Destiny (BaZi) by entering your birth date and time.

Calculate days between two dates, or add/subtract days from a specific date.

Set target dates and count down to your important events. Save multiple events and track progress.

Calculate your international age, Korean age, and days until your next birthday.

Convert between Western calendar (AD/CE) and Japanese era dates (Reiwa, Heisei, Showa, Taisho, Meiji).

Convert between metric (mm², cm², m², ha, km²) and imperial (in², ft², yd², acre, mi²) area units.

Convert between metric (mm, cm, m, km) and imperial (inch, ft, yd, mile) units.

Convert between metric (mg, g, kg) and imperial (oz, lb, st) weight units.

Convert between metric and imperial volume units. Supports ml, l, cubic meters, gallons, quarts, pints, cups, fluid ounces, tablespoons, and teaspoons.

Scientific calculator supporting basic arithmetic and scientific functions (trigonometric, logarithmic, square root, etc.).

Add, subtract, multiply, and divide fractions with simplification, mixed numbers, and decimal conversion.

Calculate base raised to the power of exponent. Supports decimal exponents, scientific notation, and copy result feature.

Calculate common logarithm (log₁₀), natural logarithm (ln), and custom base logarithm with step-by-step calculation process.

Free Korean address to English converter. Translate Korean road addresses to USPS, ISO, and standard international formats for overseas shipping and international mail.

Count characters, words, and bytes in your text.

Count words, characters, sentences, and paragraphs in your text in real-time. Estimate reading and speaking time.

Sort text lines alphabetically or by length. Remove duplicates and reverse order options available.

Create professional invoices and download as image.

Visualize and explore JSON data in a tree structure.

Calculate electricity costs for your appliances.

Convert between major currencies. (Approximate rates, offline)

Generate secure, random passwords instantly. Customize length, uppercase, lowercase, numbers, and symbols.

Generate secure, random UUID v4 identifiers. Create multiple UUIDs at once and copy them easily.

Generate MD5, SHA-1, SHA-256, and SHA-512 hash values for your text. Securely processed in your browser using Web Crypto API.

Convert URLs, text, and contacts into QR codes.

Format, minify, and validate JSON data. Features syntax highlighting and copy functionality.

Format, minify, and validate XML data. Features syntax highlighting and copy functionality.

Convert YAML to JSON and JSON to YAML. Fast and easy data format conversion tool.

Convert CSV data to JSON format. Upload a file or paste your CSV data.

Convert between image formats: PNG, JPG, WEBP, BMP. All processing in browser.

Crop images to your desired area online.

Rotate images by any angle or flip horizontally/vertically.

Convert images to Base64 strings or decode Base64 back to images.

Convert multiple images into a single PDF file. All processing happens in your browser.

Combine multiple PDF files into one. All processing happens in your browser.

Split a PDF into separate pages or ranges. All processing happens in your browser.

FPS game crosshair generator. Create Valorant, CS2 crosshairs with real-time preview and export codes.

Calculate eDPI and compare with pro players. Game style recommended sensitivity provided.

Calculate optimal FOV based on monitor distance. HFOV/VFOV converter, game FOV information included.

Mouse sensitivity converter for FPS games. Convert sensitivity between Valorant, PUBG, CS2, Overwatch 2 and more. Calculate eDPI and cm/360°.

Find out your mental age with 15 fun questions!

A quick online test to check for color vision deficiency.

Test your ability to distinguish subtle color differences.

Flip a coin with secure random generation to get heads or tails. Powered by Web Crypto API for complete randomness.

Roll secure random numbers with various dice types (D4, D6, D8, D10, D12, D20). Roll 1 to 10 dice at once with animation.

Securely generate numbers for Lotto 6/45, Powerball, Mega Millions, and EuroMillions.

Generate secure random numbers within a specified range. Support for multiple numbers, unique only option, and sorting.

Compress images to reduce file size. Adjust quality, resize dimensions, and choose output format (JPEG, PNG, WebP).

Free image resizer tool. Resize images to any width and height. Supports aspect ratio lock, percentage scaling, and multiple output formats.

Enter any one value (radius, diameter, circumference, or area) to automatically calculate all other circle properties.

Calculate all properties of a triangle given three sides, two sides and an angle, or one side and two angles. Find area, perimeter, and triangle type.

Calculate Japanese income tax, inhabitant tax, and social insurance premiums from your annual income.

Calculate Japanese health insurance, nursing care insurance, and pension premiums from your monthly income.

Calculate your Four Pillars of Destiny (BaZi) by entering your birth date and time.

Calculate your zodiac animal by birth year and discover your Gan-Zhi (Heavenly Stem and Earthly Branch).