Online Tools Directory

Solve an implied interest rate from a loan payment, simple interest amount, or compound return target.

Estimate compound interest with principal, recurring contributions, compounding frequency, and inflation adjustment.

Project investment growth with contributions, expected return, fees, tax drag, contribution increases, and inflation.

Estimate retirement savings, target nest egg, projected gap or surplus, and required monthly contribution.

Estimate how long it will take to pay off a credit card balance and how much interest you may pay.

Build a debt payoff plan using the snowball or avalanche method with minimum payments and extra monthly cash.

Estimate a home purchase budget from income, debts, down payment, mortgage rate, taxes, insurance, HOA, and DTI.

Build a monthly budget with income, needs, wants, savings, expenses, monthly surplus, and annual surplus.

Calculate months to a savings goal, required monthly savings, projected value, remaining amount, and interest earned.

Estimate a trip budget with travelers, nights, flights, lodging, food, transportation, activities, fixed costs, and buffer.

Calculate sales tax from a basic percentage, including tax-added and tax-included modes.

Calculate sales commission, accelerator commission, quota attainment, total pay, and pay after draw.

Calculate break-even units, break-even revenue, contribution margin, target profit units, and margin of safety.

Calculate a tip amount, tax, total bill, service fee, and per-person split for meals and shared expenses.

Calculate recipe cost, adjusted batch cost, cost per serving, suggested price per serving, and total suggested revenue.

Estimate accrued PTO, carryover vacation time, used days, planned days, remaining days, and remaining hours.

Calculate net daily, weekly, biweekly, monthly, and annual work hours from shift times, breaks, and days worked.

Build a repeating work and off-day schedule from a start date, work days, off days, shift length, and cycle count.

Calculate a freelance hourly rate, day rate, weekly revenue target, and annual revenue target from income and expense assumptions.

Calculate daily carbohydrate, protein, and fat grams from calories and macro percentages, with fiber and saturated fat planning targets.

Estimate daily total water, beverage water, cups, common bottle equivalents, and reference adequate intake values.

Estimate adult ideal weight using common height-based formulas, frame-size adjustment, and a BMI-based healthy weight range.

Calculate daily protein grams, protein per meal, calories from protein, grams per body weight, and RDA baseline.

Convert steps into estimated calories burned, distance, duration, stride length, and steps per mile using height, weight, and pace.

Calculate exact age in years, months, days, total time lived, and days until the next birthday.

Calculate voltage, current, resistance, and power from any two known circuit values.

Start preset or custom countdown timers with pause, reset, browser tab countdowns, and a sound alert when time is up.

Convert hex, RGB, RGBA, HSL, and HSLA color codes to common web color formats with contrast checks.

Test JavaScript regular expressions with flags, match indexes, capture groups, and replacement previews.

Count words, characters, sentences, paragraphs, lines, reading time, and top keywords in pasted text.

Count characters, letters, digits, punctuation, spaces, lines, longest line length, and UTF-8 bytes.

Clean text, convert case, remove spaces, normalize blank lines, create slugs, and format pasted text locally.

Remove line breaks, join lines with spaces, commas, custom separators, and clean copied text without uploads.

Compare two blocks of text line by line with added, removed, unchanged, and similarity summary results.

Sort lists alphabetically, numerically, or by length while trimming items, removing blanks, and deduplicating entries.

Pick random names from pasted lists, CSV files, or XLSX spreadsheets with optional unique results.

Generate random UUID v4 batches in standard, uppercase, compact, brace-wrapped, plain-list, JSON, or CSV output formats.

Generate strong random passwords with batch output, custom symbols, character-set controls, ambiguous-character filtering, and entropy estimates.

Generate memorable random passphrases with configurable word count, separators, capitalization, number suffixes, and entropy estimates.

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files locally in your browser.

Generate placeholder lorem ipsum text with configurable paragraph, sentence, word count, and plain-text or HTML output.