ALL TOOLS / PUBLISHED

Useful tools, published with evidence.

Every tool that works in the current release, in 12 categories — 269 tools in total. Live-data pages and the API surfaces are network features and are listed separately.

SECTION 01

CALCULATION DESK

Formula, cost, schedule, and ratio workbenches

20 TOOLS

TOOL 01 / IMPLEMENTED

CALCULATORS / LOCAL

Percentage calculator

Solve four common percentage questions with a clear formula.

ROUTE /tools/percentage-calculatorMODE / LOCAL

Open tool

TOOL 02 / IMPLEMENTED

CALCULATORS / LOCAL

Discount calculator

Find the discount amount and final price for a percentage-off sale.

ROUTE /tools/discount-calculatorMODE / LOCAL

Open tool

TOOL 03 / IMPLEMENTED

FINANCE / LOCAL

Gross margin calculator

Calculate gross profit and gross-margin percentage.

ROUTE /tools/profit-margin-calculatorMODE / LOCAL

Open tool

TOOL 04 / IMPLEMENTED

FINANCE / LOCAL

Markup calculator

Calculate markup amount and selling price.

ROUTE /tools/markup-calculatorMODE / LOCAL

Open tool

TOOL 05 / IMPLEMENTED

FINANCE / LOCAL

ROI calculator

Calculate profit and return on investment percentage.

ROUTE /tools/roi-calculatorMODE / LOCAL

Open tool

TOOL 06 / IMPLEMENTED

FINANCE / LOCAL

Simple interest calculator

Calculate simple interest and maturity value.

ROUTE /tools/simple-interest-calculatorMODE / LOCAL

Open tool

TOOL 07 / IMPLEMENTED

FINANCE / LOCAL

Compound interest calculator

Project a compounded balance with optional monthly contributions.

ROUTE /tools/compound-interest-calculatorMODE / LOCAL

Open tool

TOOL 08 / IMPLEMENTED

FINANCE / LOCAL

Loan payment calculator

Calculate monthly payment, total interest, and total repayment.

ROUTE /tools/loan-payment-calculatorMODE / LOCAL

Open tool

TOOL 09 / IMPLEMENTED

FINANCE / LOCAL

Amortization calculator

Generate a fixed-rate monthly amortization schedule.

ROUTE /tools/amortization-calculatorMODE / LOCAL

Open tool

TOOL 10 / IMPLEMENTED

FINANCE / LOCAL

Savings goal calculator

Project a dated savings goal with monthly contributions.

ROUTE /tools/savings-goal-calculatorMODE / LOCAL

Open tool

TOOL 21 / IMPLEMENTED

CALCULATORS / LOCAL

VAT calculator

Calculate VAT and net or gross totals from a supplied rate.

ROUTE /tools/vat-calculatorMODE / LOCAL

Open tool

TOOL 22 / IMPLEMENTED

CALCULATORS / LOCAL

Sales tax calculator

Calculate sales tax and a total from a supplied price and rate.

ROUTE /tools/sales-tax-calculatorMODE / LOCAL

Open tool

TOOL 23 / IMPLEMENTED

CALCULATORS / LOCAL

Tip calculator

Calculate a tip, total bill, and per-person share locally.

ROUTE /tools/tip-calculatorMODE / LOCAL

Open tool

TOOL 24 / IMPLEMENTED

CALCULATORS / LOCAL

Split bill calculator

Split a shared total among people with an optional extra charge.

ROUTE /tools/split-bill-calculatorMODE / LOCAL

Open tool

TOOL 25 / IMPLEMENTED

FINANCE / LOCAL

Currency converter

Convert an amount using a manually supplied exchange rate.

ROUTE /tools/currency-converterMODE / LOCAL

Open tool

TOOL 26 / IMPLEMENTED

CALCULATORS / LOCAL

Date difference calculator

Find elapsed calendar days, weeks, and approximate years between dates.

ROUTE /tools/date-difference-calculatorMODE / LOCAL

Open tool

TOOL 27 / IMPLEMENTED

CALCULATORS / LOCAL

Age calculator

Calculate completed years, months, and days between a birth date and reference date.

ROUTE /tools/age-calculatorMODE / LOCAL

Open tool

TOOL 28 / IMPLEMENTED

CALCULATORS / LOCAL

Time duration calculator

Calculate elapsed days, hours, and minutes between two date-times.

ROUTE /tools/time-duration-calculatorMODE / LOCAL

Open tool

TOOL 29 / IMPLEMENTED

CALCULATORS / LOCAL

Business days calculator

Count weekdays between two dates with optional end-date inclusion.

ROUTE /tools/business-days-calculatorMODE / LOCAL

Open tool

TOOL 30 / IMPLEMENTED

CALCULATORS / LOCAL

Work hours calculator

Calculate daily elapsed and break-adjusted work hours from stated times.

ROUTE /tools/work-hours-calculatorMODE / LOCAL

Open tool

SECTION 02

DEVELOPER BENCH

Local transformation, parser, and reference workbenches

9 TOOLS

TOOL 11 / IMPLEMENTED

DEVELOPER / LOCAL

JSON formatter

Format valid JSON into readable, indented text.

ROUTE /tools/json-formatterMODE / LOCAL

Open tool

TOOL 12 / IMPLEMENTED

DEVELOPER / LOCAL

JSON validator

Check whether text is syntactically valid JSON.

ROUTE /tools/json-validatorMODE / LOCAL

Open tool

TOOL 13 / IMPLEMENTED

DEVELOPER / LOCAL

JSON minifier

Minify valid JSON without changing its parsed value.

ROUTE /tools/json-minifierMODE / LOCAL

Open tool

TOOL 14 / IMPLEMENTED

DEVELOPER / LOCAL

Base64 encoder

Encode Unicode text as Base64 with browser-native APIs, locally.

ROUTE /tools/base64-encoderMODE / LOCAL

Open tool

TOOL 15 / IMPLEMENTED

DEVELOPER / LOCAL

Base64 decoder

Decode Base64 into Unicode text locally.

ROUTE /tools/base64-decoderMODE / LOCAL

Open tool

TOOL 16 / IMPLEMENTED

DEVELOPER / LOCAL

UUID generator

Generate one or more UUID v4 values locally in the browser.

ROUTE /tools/uuid-generatorMODE / LOCAL

Open tool

TOOL 17 / IMPLEMENTED

DEVELOPER / LOCAL

SHA-256 hash generator

Generate a SHA-256 digest for text locally.

ROUTE /tools/sha256-checksumMODE / LOCAL

Open tool

TOOL 18 / IMPLEMENTED

DEVELOPER / LOCAL

JWT decoder / inspector

Decode a JWT header and payload without verifying it.

ROUTE /tools/jwt-decoderMODE / LOCAL

Open tool

TOOL 19 / IMPLEMENTED

DEVELOPER / LOCAL

Regex tester

Test a JavaScript regular expression against text.

ROUTE /tools/regex-testerMODE / LOCAL

Open tool

SECTION 04

CONVERSION BAY

Fixed-factor unit, date, timezone, and color conversions

1 TOOL

TOOL 20 / IMPLEMENTED

CONVERTERS / LOCAL

Unix timestamp converter

Convert Unix timestamps and date-times with an explicit timezone.

ROUTE /tools/unix-timestamp-converterMODE / LOCAL

Open tool

ALL TOOLS / PUBLISHED

Useful tools, published with evidence.

Every tool that works in the current release, in 12 categories — 269 tools in total. Live-data pages and the API surfaces are network features and are listed separately.

SECTION 01

CALCULATION DESK

Formula, cost, schedule, and ratio workbenches

20 TOOLS

TOOL 01 / IMPLEMENTED

CALCULATORS / LOCAL

Percentage calculator

Solve four common percentage questions with a clear formula.

ROUTE /tools/percentage-calculatorMODE / LOCAL

Open tool

TOOL 02 / IMPLEMENTED

CALCULATORS / LOCAL

Discount calculator

Find the discount amount and final price for a percentage-off sale.

ROUTE /tools/discount-calculatorMODE / LOCAL

Open tool

TOOL 03 / IMPLEMENTED

FINANCE / LOCAL

Gross margin calculator

Calculate gross profit and gross-margin percentage.

ROUTE /tools/profit-margin-calculatorMODE / LOCAL

Open tool

TOOL 04 / IMPLEMENTED

FINANCE / LOCAL

Markup calculator

Calculate markup amount and selling price.

ROUTE /tools/markup-calculatorMODE / LOCAL

Open tool

TOOL 05 / IMPLEMENTED

FINANCE / LOCAL

ROI calculator

Calculate profit and return on investment percentage.

ROUTE /tools/roi-calculatorMODE / LOCAL

Open tool

TOOL 06 / IMPLEMENTED

FINANCE / LOCAL

Simple interest calculator

Calculate simple interest and maturity value.

ROUTE /tools/simple-interest-calculatorMODE / LOCAL

Open tool

TOOL 07 / IMPLEMENTED

FINANCE / LOCAL

Compound interest calculator

Project a compounded balance with optional monthly contributions.

ROUTE /tools/compound-interest-calculatorMODE / LOCAL

Open tool

TOOL 08 / IMPLEMENTED

FINANCE / LOCAL

Loan payment calculator

Calculate monthly payment, total interest, and total repayment.

ROUTE /tools/loan-payment-calculatorMODE / LOCAL

Open tool

TOOL 09 / IMPLEMENTED

FINANCE / LOCAL

Amortization calculator

Generate a fixed-rate monthly amortization schedule.

ROUTE /tools/amortization-calculatorMODE / LOCAL

Open tool

TOOL 10 / IMPLEMENTED

FINANCE / LOCAL

Savings goal calculator

Project a dated savings goal with monthly contributions.

ROUTE /tools/savings-goal-calculatorMODE / LOCAL

Open tool

TOOL 21 / IMPLEMENTED

CALCULATORS / LOCAL

VAT calculator

Calculate VAT and net or gross totals from a supplied rate.

ROUTE /tools/vat-calculatorMODE / LOCAL

Open tool

TOOL 22 / IMPLEMENTED

CALCULATORS / LOCAL

Sales tax calculator

Calculate sales tax and a total from a supplied price and rate.

ROUTE /tools/sales-tax-calculatorMODE / LOCAL

Open tool

TOOL 23 / IMPLEMENTED

CALCULATORS / LOCAL

Tip calculator

Calculate a tip, total bill, and per-person share locally.

ROUTE /tools/tip-calculatorMODE / LOCAL

Open tool

TOOL 24 / IMPLEMENTED

CALCULATORS / LOCAL

Split bill calculator

Split a shared total among people with an optional extra charge.

ROUTE /tools/split-bill-calculatorMODE / LOCAL

Open tool

TOOL 25 / IMPLEMENTED

FINANCE / LOCAL

Currency converter

Convert an amount using a manually supplied exchange rate.

ROUTE /tools/currency-converterMODE / LOCAL

Open tool

TOOL 26 / IMPLEMENTED

CALCULATORS / LOCAL

Date difference calculator

Find elapsed calendar days, weeks, and approximate years between dates.

ROUTE /tools/date-difference-calculatorMODE / LOCAL

Open tool

TOOL 27 / IMPLEMENTED

CALCULATORS / LOCAL

Age calculator

Calculate completed years, months, and days between a birth date and reference date.

ROUTE /tools/age-calculatorMODE / LOCAL

Open tool

TOOL 28 / IMPLEMENTED

CALCULATORS / LOCAL

Time duration calculator

Calculate elapsed days, hours, and minutes between two date-times.

ROUTE /tools/time-duration-calculatorMODE / LOCAL

Open tool

TOOL 29 / IMPLEMENTED

CALCULATORS / LOCAL

Business days calculator

Count weekdays between two dates with optional end-date inclusion.

ROUTE /tools/business-days-calculatorMODE / LOCAL

Open tool

TOOL 30 / IMPLEMENTED

CALCULATORS / LOCAL

Work hours calculator

Calculate daily elapsed and break-adjusted work hours from stated times.

ROUTE /tools/work-hours-calculatorMODE / LOCAL

Open tool

SECTION 02

DEVELOPER BENCH

Local transformation, parser, and reference workbenches

9 TOOLS

TOOL 11 / IMPLEMENTED

DEVELOPER / LOCAL

JSON formatter

Format valid JSON into readable, indented text.

ROUTE /tools/json-formatterMODE / LOCAL

Open tool

TOOL 12 / IMPLEMENTED

DEVELOPER / LOCAL

JSON validator

Check whether text is syntactically valid JSON.

ROUTE /tools/json-validatorMODE / LOCAL

Open tool

TOOL 13 / IMPLEMENTED

DEVELOPER / LOCAL

JSON minifier

Minify valid JSON without changing its parsed value.

ROUTE /tools/json-minifierMODE / LOCAL

Open tool

TOOL 14 / IMPLEMENTED

DEVELOPER / LOCAL

Base64 encoder

Encode Unicode text as Base64 with browser-native APIs, locally.

ROUTE /tools/base64-encoderMODE / LOCAL

Open tool

TOOL 15 / IMPLEMENTED

DEVELOPER / LOCAL

Base64 decoder

Decode Base64 into Unicode text locally.

ROUTE /tools/base64-decoderMODE / LOCAL

Open tool

TOOL 16 / IMPLEMENTED

DEVELOPER / LOCAL

UUID generator

Generate one or more UUID v4 values locally in the browser.

ROUTE /tools/uuid-generatorMODE / LOCAL

Open tool

TOOL 17 / IMPLEMENTED

DEVELOPER / LOCAL

SHA-256 hash generator

Generate a SHA-256 digest for text locally.

ROUTE /tools/sha256-checksumMODE / LOCAL

Open tool

TOOL 18 / IMPLEMENTED

DEVELOPER / LOCAL

JWT decoder / inspector

Decode a JWT header and payload without verifying it.

ROUTE /tools/jwt-decoderMODE / LOCAL

Open tool

TOOL 19 / IMPLEMENTED

DEVELOPER / LOCAL

Regex tester

Test a JavaScript regular expression against text.

ROUTE /tools/regex-testerMODE / LOCAL

Open tool

SECTION 04

CONVERSION BAY

Fixed-factor unit, date, timezone, and color conversions

1 TOOL

TOOL 20 / IMPLEMENTED

CONVERTERS / LOCAL

Unix timestamp converter

Convert Unix timestamps and date-times with an explicit timezone.

ROUTE /tools/unix-timestamp-converterMODE / LOCAL

Open tool