Every boring tool you need, in one fast place
Calculators, converters, generators, formatters and validators that just work — free, private and instant.
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All tools →File & Data Converters
JSON ⇄ CSV, XML, YAML, Base64, color & number-base converters that run in your browser.
29 toolsPDF Tools
Merge, split, compress, convert and edit PDF files for free.
8 toolsText Tools
Clean, count, transform and reformat any text in one click.
34 toolsDeveloper Tools
Formatters, validators, encoders, hashers and generators for developers.
17 toolsSEO Tools
Meta tags, schema markup, robots.txt, UTM and slug generators.
11 toolsFinance Calculators
EMI, SIP, GST, tax, mortgage and investment calculators.
41 toolsBusiness & Ecommerce
Margin, pricing, breakeven, SaaS metrics and marketplace-fee calculators.
22 toolsHR & Office
Salary, overtime, timesheet calculators and workplace letter generators.
11 toolsDocuments & Legal
Invoices, quotations, NDAs, contracts and policy generators.
11 toolsImage Tools
Convert PNG/JPG/WebP, resize, compress and make favicons — privately.
9 toolsUnit Converters
Length, weight, temperature, volume, speed, data and cooking converters.
78 toolsHealth & Fitness
BMI, calorie, body-fat, macro, pace and pregnancy calculators.
18 toolsDate & Time
Age, date difference, countdown, business-day and timestamp tools.
9 toolsMath & Everyday
Percentage, fraction, ratio, GPA, tip and random generators.
19 toolsMost popular tools
Coin Flip — Heads or Tails
MathFlip a virtual coin and get heads or tails instantly — with a history of your last flips.
Mortgage Calculator
FinanceEstimate your monthly mortgage payment, total interest and amortization schedule for any loan amount, rate and term.
Meters to Feet Converter
UnitsConvert meters to feet instantly and accurately. 1 m = 3.2808 ft. Type any value below — the result updates as you type.
Random Number Generator
DevGenerate random numbers within any min–max range, with options for uniqueness and how many to produce.
BMI Calculator
HealthCalculate your Body Mass Index from height and weight, and see which BMI category you fall into. Supports metric and imperial units.
Percentage Calculator
MathWork out what X% of a number is — and switch to the other common percentage questions too.
What Percentage Is X of Y Calculator
MathFind out what percentage one number is of another.
Hours Calculator
HRCalculate the number of hours and minutes between a start and end time — ideal for timesheets and shifts.