๐ Free Online Converters
Instantly convert between units, formats, and data types. All converters run in your browser - fast, private, and free.
33 free tools available
Unit Converter
Convert between units of length, weight, temperature, volume, speed, and more.
URL Encoder / Decoder
Encode or decode URLs and query strings. Converts special characters to percent-encoded format.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Seconds and milliseconds.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more.
Screen & Device Info
Check your screen resolution, viewport size, pixel ratio, and device capabilities in real-time.
Text to Binary Translator
Convert text to binary code and binary back to text. Also shows hex, octal, and decimal representations.
Roman Numeral Converter
Convert between decimal numbers and Roman numerals. Bidirectional conversion with validation. Supports 1-3999 (I-MMMCMXCIX).
Morse Code Translator
Convert text to Morse code and Morse code back to text. Visual dot-dash display. Supports letters, numbers, and punctuation.
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Reference table with common temperatures and conversion formulas.
Cooking Converter
Convert between cooking measurements: cups, tablespoons, teaspoons, ml, liters, grams, ounces, and oven temperatures. Quick reference chart included.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and cm. Charts for men, women, and kids. Find your size by foot length measurement.
Byte Converter
Convert between data size units: bits, bytes, KB, MB, GB, TB, PB, and binary units (KiB, MiB, GiB).
JSON to CSV Converter
Convert JSON arrays to CSV and CSV back to JSON. Handles nested objects, custom delimiters, and quoted fields.
Number to Words
Convert numbers to their English word equivalent. Supports cardinal, ordinal, and currency modes with decimals.
Area Converter
Convert between square meters, square feet, acres, hectares, square yards, and more area units instantly.
Pressure Converter
Convert between PSI, bar, Pascal, atmosphere, torr, and other pressure units. Instant results for all units.
Weight Converter
Convert between kilograms, pounds, ounces, stones, grams, and more weight units. Quick and accurate.
Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, electronvolts, and more energy units instantly.
Speed Converter
Convert between km/h, mph, m/s, knots, Mach, and more speed units. Instant and accurate results.
Volume Converter
Convert between liters, gallons, cups, milliliters, fluid ounces, tablespoons, and more volume units.
Data Rate Converter
Convert between data transfer rate units: Mbps, Gbps, KB/s, MB/s, and more. Includes download time estimates and common speed presets.
Binary to Text Converter
Convert binary strings to readable text and back. Supports ASCII, UTF-8, and multiple encoding formats.
HTML to Text Converter
Strip HTML tags and extract clean plain text. Preserves links, handles nested elements, and respects whitespace.
Text to CSV Converter
Convert tab-separated, space-separated, or pipe-delimited text into properly formatted CSV. Auto-detects delimiters with download support.
Binary to Decimal Converter
Convert between binary, decimal, hexadecimal, and octal instantly. Live conversion as you type with bit visualization.
Angle Converter
Convert between degrees, radians, gradians, turns, arcminutes, and arcseconds. Instant bidirectional conversion with visual angle display.
Length Converter
Convert between metric and imperial length units. Supports millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
Power Converter
Convert between watts, kilowatts, horsepower, BTU/h, megawatts, and more. Includes mechanical and electrical power units.
Clothing Size Converter
Convert clothing sizes between US, UK, EU, and Asian standards. Covers shirts, pants, shoes, and dresses for men, women, and children.
Frequency Converter
Convert between Hz, kHz, MHz, GHz, THz, RPM, and BPM. Calculate period and wavelength for electromagnetic waves.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, JP, and CM for men, women, and kids. Full size chart reference included.
Race Time Predictor
Predict race times for 5K, 10K, half marathon, and marathon using the Riegel formula. Pace tables and split strategy included.
Number Base Converter
Convert numbers between any bases from 2 to 36. Binary, octal, decimal, hex and custom bases. Batch convert with conversion steps.
Frequently Asked Questions
Are these converters accurate?
Yes, all converters use standard conversion formulas and are regularly verified for accuracy. Results are calculated instantly in your browser.
Can I convert multiple values at once?
Most converters support instant conversion as you type. Enter your value and see the result immediately across all target units.
Do converters work offline?
Yes, since all calculations happen in your browser, most converters work without an internet connection once the page is loaded.