Every tool you need for the daily web
Calculators, converters, developer utilities, and text tools — all running locally in your browser. Fast, private, no ads on the tools themselves.
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Popular tools
View all →Percentage Calculator
Calculate percentages, percent change, and percent of a number instantly.
JSON Formatter
Pretty-print, minify, and validate JSON.
Password Generator
Strong, customizable passwords with strength meter.
Length Converter
Convert meters, feet, miles, kilometers, inches, and more.
Word & Text Counter
Count words, characters, lines, sentences, and reading time.
Unix Timestamp Converter
Epoch to date and date to epoch.
QR Code Generator
Generate QR codes for URLs, text, or contact cards.
Color Picker
Pick colors and copy in HEX, RGB, HSL, OKLCH.
Browse by category
Web & Developer
Tools every web developer needs.
Text & String
Manipulate, count, compare, and clean text.
List Tools
Set operations, filtering, and clipboard transforms for lists.
Date & Time
Date math, age, and timezone tools.
Math
Calculators for everyday and advanced math.
Unit Converters
Convert between units of length, weight, temperature, and more.
Number & Code
Binary, hex, ASCII, and base converters.
Generators
Passwords, IDs, QR codes, and more.
Design & CSS
Color, typography, spacing, and CSS generators.
Network & Security
Networking, certificates, hashing, and security utilities.
Personal Finance
Loans, taxes, salary, and everyday money decisions.
Investing & Corporate Finance
Valuation, options, fixed income, and risk metrics for analysts.
Marketing & SEO
Ad math, conversion, A/B testing, and SEO helpers.
Health & Medical
Clinical formulas, dosing, and physiology calculators.
Electrical & Electronics
Practical calculators for circuits and electronics.