Free online tools that actually load fast.

Free online word counter. Instantly count words, characters (with and without spaces), sentences, paragraphs and estimated reading time.

Convert text to UPPERCASE, lowercase, Title Case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and more — all at once, in your browser.

Generate strong, secure random passwords using your browser's cryptographic random source. Choose length, character types, and an anti-ambiguity option.

Paste JSON and instantly format, validate and minify it. Errors show the exact line and column. Works fully offline in your browser.

Free age calculator. From a date of birth, see exact years/months/days, total months, weeks, days, hours, and the countdown to your next birthday.

Calculate tip on a restaurant bill and split the total fairly across the table. Quick percentages (10/15/18/20/25) plus custom rates and party size.

Three-in-one discount calculator: find the sale price after a % off, the discount % between two prices, or the original price before a known discount.

Calculate X% of Y, find what % X is of Y, or compute the % change between two numbers. The three percentage questions that come up most often.

Calculate your Body Mass Index in metric (cm/kg) or imperial (ft/in/lb) units. See your BMI category and the healthy weight range for your height.

Calculate Rwanda PAYE (Pay As You Earn) monthly income tax. See the tax owed in each RRA bracket for your gross salary — updated to current RRA brackets.

Convert gross salary to net take-home in Rwanda. Includes PAYE, RSSB pension, maternity contribution and optional CBHI, plus total employer cost.

Calculate MTN MoMo fees in Rwanda. Covers sending, withdrawing at agent, bank push/pull, international remittance, tax and school fee payments — from MTN's official tariff.

Convert between 20 world currencies — USD, EUR, GBP, RWF, KES, NGN and more — with live mid-market rates updated hourly.

Convert between metric and imperial units — length, weight, temperature, volume, area and speed. 230+ pair pages with formulas and reference tables.

Calculate compound interest with monthly contributions and a year-by-year breakdown. See total interest earned and projected balance over any horizon.

Calculate the monthly payment (EMI), total amount paid and total interest on any fixed-rate loan — personal, car, student, or general purpose.

Project the future cost of an item and the lost buying power of money over time at any inflation rate. Common rate presets included.

Estimate the full monthly mortgage payment (principal, interest, tax, insurance, HOA), with a year-by-year or month-by-month amortization schedule and balance chart.

Project your retirement savings and the income they'll sustainably produce. Includes the 4% safe withdrawal rule and a chart of contributions vs. investment growth.

Calculate total ROI and annualised return (CAGR) for any investment given its initial value, final value and holding period. Handles gains and losses.

Two modes: how much to save monthly to reach a goal in N years, or how long it'll take given a fixed monthly contribution. Accounts for compound growth.

Calculate your FIRE number (25× expenses), years to reach it, and whether you've already hit Coast FIRE — enough invested today to coast to retirement without further saving.

Compare Snowball (smallest balance first) and Avalanche (highest APR first) payoff strategies across all your debts. See months to debt-free and total interest saved.

Two modes: how long to clear a balance at $X/month, or what monthly payment is needed to clear it in N months. Includes total interest paid.

Compare the true long-term cost of renting vs buying a home, including down payment, mortgage, tax, maintenance, appreciation, and the renter's investment opportunity cost.

Split your monthly income into a 50/30/20, 70/20/10 or 60/30/10 budget — or build a custom zero-based budget with your own categories. Live pie chart.

Add VAT or sales tax to a net amount, or split a tax-inclusive amount back into net and tax. Custom rate plus presets for common rates worldwide.