Every little tool, in one fast place

Converters, calculators, encoders, network tools and more - clean, free and private. Most run entirely in your browser, so nothing is uploaded.

IP & Network

What Is My IP Instantly see the public IP address your connection is using right now, plus where it appears to be. IP Lookup Enter an IP address to see where it is and which network it belongs to, or leave it blank to look up your own. IP WHOIS Lookup Enter an IP address to fetch its WHOIS registration details from the regional internet registry. DNS Lookup Enter a domain name and pick a record type (or All) to see its live DNS records. Reverse DNS Lookup Enter an IP address to find the hostname its owner has set in reverse DNS. Domain WHOIS Lookup Enter a domain name to look up who registered it, when it was created, and when it expires. Open Port Checker Check which common service ports are reachable on your own public IP from the outside internet. Email Header Analyzer Paste the full headers of an email to see how it was routed and whether it passed SPF, DKIM and DMARC checks. Bulk IP Lookup Paste a list of IP addresses (one per line or comma-separated) to look them all up at once.

Unit Converters

Length Converter Quickly convert a length or distance between metric and imperial units - no sign-up, and nothing leaves your browser. Weight Converter Convert a weight between metric and imperial units instantly. Everything runs locally in your browser. Temperature Converter Convert a temperature between Celsius, Fahrenheit and Kelvin. Type a value and read off every scale. Data Size Converter Convert file or storage sizes between decimal (KB, MB, GB) and binary (KiB, MiB, GiB) units instantly. Area Converter Work out how big a space is in different units - switch a floor, garden or plot of land between square metres, square feet, acres and hectares. Volume Converter Switch a volume between metric and US measures - handy when a recipe lists cups or tablespoons but your jug shows millilitres and litres. Time Converter Turn a duration into any other unit of time - see how many seconds are in a day, or how many weeks make up a year, in one tap. Speed Converter Convert a speed between km/h, mph, knots and metres per second - perfect for reading a foreign speed limit or a boat or wind report. Pace Converter Convert your running pace between minutes per kilometre and minutes per mile, so race plans and treadmill numbers finally line up. Pressure Converter Convert a pressure reading between bar, psi, kPa, atmospheres and mmHg - handy for tyre pressures, weather charts and dive tables. Energy Converter Convert energy between joules, calories, watt-hours and BTU - handy for food labels, electricity bills and heating figures. Power Converter Convert power between watts, kilowatts, horsepower and BTU per hour - useful for car engines, motors and heating or cooling specs. Frequency Converter Convert a frequency between hertz, kHz, MHz, GHz and rpm - useful for audio, radio bands, processor clocks and spinning machinery. Angle Converter Convert an angle between degrees, radians, gradians and revolutions - handy for geometry, trigonometry and engineering drawings. Torque Converter Convert torque between newton-metres and pound-feet - exactly what you need when a tool or service manual uses the other unit. Voltage Converter Convert a voltage between volts, millivolts, kilovolts and microvolts - useful for electronics projects, sensors and battery specs. Current Converter Convert an electric current between amperes, milliamperes, microamperes and kiloamperes - useful for circuits, chargers and fuses. Charge Converter Convert electric charge between coulombs and ampere-hours - handy for comparing battery capacities listed in mAh, Ah or coulombs. Illuminance Converter Convert light levels between lux and foot-candles - handy for lighting design, photography and checking a room is bright enough. Parts-Per Converter Convert a concentration between ppm, ppb, ppt and percent - handy for water tests, air quality readings and lab measurements. Apparent Power Converter Convert apparent power between VA, kVA and MVA - exactly what you need when sizing a generator, UPS or transformer. Reactive Power Converter Convert reactive power between var, kvar and Mvar - handy for power-factor correction and electrical engineering calculations. Reactive Energy Converter Convert reactive energy between varh, kvarh and Mvarh - useful when reading industrial electricity meters and utility bills. Flow Rate Converter Convert a flow rate between litres per minute, gallons per minute, cubic metres per hour and cfm - handy for pumps, pipes and fans.

Calculators

Percentage Calculator Calculate a percentage of any value. Enter a percentage and a number to see the result. Loan Calculator Estimate your monthly payment and total interest on a loan. Enter the amount, annual rate and term in months. Discount Calculator See what an item costs after a discount. Enter the original price and the discount percentage to get the final price and your savings. Sales Tax Calculator Work out how much sales tax to add to a purchase. Enter the amount before tax and the tax rate to see the tax and the total. GST Calculator Calculate Goods and Services Tax on an amount. Enter the price before GST and the GST rate to get the GST and the total including it. Margin Calculator Find your profit and profit margin. Enter what an item costs you and what you sell it for to see the profit and margin percentage. CPM Calculator Find your cost per thousand impressions for an ad campaign. Enter the total cost and the number of impressions to get the CPM. Tip Calculator Quickly work out a tip and split the bill. Enter the bill amount, tip percentage and number of people to see the tip, total and per-person share. PayPal Fee Calculator See how much PayPal takes from a payment. Enter the amount, the percentage fee and the fixed fee to get the fee and what you keep. Probability Calculator Find the odds over repeated tries. Enter the chance of a single event and how many times you try to see the chance of at least one success. Confidence Interval Calculator Build a confidence interval around your sample mean. Enter the mean, standard deviation, sample size and confidence level to get the range.

Base & Encoding

Text to Binary Turn text into binary (base-2). Each character becomes its eight-bit byte value. Binary to Text Decode eight-bit binary back into text. Paste space-separated binary bytes to convert. Decimal to Hexadecimal Convert a whole number from decimal (base-10) to hexadecimal (base-16). Binary to Decimal Convert a binary number to its decimal value. Text to Hexadecimal Convert text into hexadecimal. Every character becomes its two-digit hex byte value. Hexadecimal to Text Convert hexadecimal byte values back into text. Paste space-separated hex codes to decode. Text to Octal Turn text into octal. Each character is shown as its base-8 byte value. Octal to Text Convert octal byte values back into text. Paste space-separated octal codes to decode. Text to Decimal Turn text into decimal. Every character becomes its base-10 byte value. Decimal to Text Convert decimal byte codes back into text. Paste space-separated decimal values to decode. ASCII to Binary Turn ASCII characters into binary. Each character becomes its eight-bit code. Binary to ASCII Convert binary bytes into ASCII characters. Paste space-separated binary to decode. ASCII to Text Read ASCII characters as plain text, ready to copy or convert further. Binary to Octal Convert a binary number to its octal (base-8) value. Binary to Hexadecimal Convert a binary number to its hexadecimal (base-16) value. Octal to Binary Convert an octal number to its binary (base-2) value. Octal to Decimal Convert an octal number to its decimal (base-10) value. Octal to Hexadecimal Convert an octal number to its hexadecimal (base-16) value. Decimal to Binary Convert a whole number from decimal (base-10) to binary (base-2). Decimal to Octal Convert a whole number from decimal (base-10) to octal (base-8). Hexadecimal to Binary Convert a hexadecimal number to its binary (base-2) value. Hexadecimal to Octal Convert a hexadecimal number to its octal (base-8) value. Hexadecimal to Decimal Convert a hexadecimal number to its decimal (base-10) value. Base64 Encode Convert text to a Base64 string - handy for embedding data in URLs, JSON or data URIs. Base64 Decode Convert a Base64 string back into readable text. URL Encode URL-encode text so it can be safely placed in a link or query parameter. URL Decode URL-decode a string, converting percent-escapes like %20 back into normal characters. HTML Encode Escape special characters into HTML entities so they render as text, not markup. HTML Decode Unescape HTML entities, converting things like < and & back into < and &.

Developer & Data

JSON Formatter Paste JSON to format it with clean, consistent indentation. Invalid input is flagged with an error message, and everything runs locally in your browser. JSON Minifier Paste formatted JSON to compress it into a single line with no insignificant whitespace. The tool reports how many characters were removed, all in your browser. JSON Validator Paste JSON to check whether it is valid. When it is not, the validator reports the error message and the line and column where parsing failed - all in your browser. JSON to CSV Paste a JSON array of objects to convert it into CSV. Columns are taken from the union of all keys, fields with commas or quotes are escaped, and you can download the result - all locally. CSV to JSON Paste CSV with a header row to convert each row into a JSON object. Quoted fields are parsed correctly and numbers, booleans and null are auto-detected - all in your browser. JWT Decoder Paste a JSON Web Token to decode its header and payload from base64url into readable JSON. The signature is not verified - this only reads claims, and everything stays in your browser. JavaScript Beautifier Paste minified or unformatted JavaScript to reformat it with consistent indentation and spacing. Formatting runs entirely in your browser, so your code is never uploaded. CSS Beautifier Paste minified or unformatted CSS to reformat it with one declaration per line and tidy indentation. Everything runs in your browser, so your styles are never uploaded. HTML Beautifier Paste minified or unformatted HTML to reformat it with proper indentation and nesting. Formatting runs entirely in your browser, so your markup is never uploaded.

Text Tools

Text to Slug Convert text into a URL slug - lowercase words joined by hyphens, with accents and punctuation removed. Reverse Text Flip your text so it reads backwards, character by character. Remove Line Breaks Strip line breaks out of text to collapse it into one continuous paragraph. Uppercase Text Change your text so every letter becomes a capital, leaving numbers and symbols untouched. Lowercase Text Change every letter in your text to a small (lowercase) letter while keeping numbers and spacing as-is. Title Case Capitalise the first letter of each word in your text, the way headlines and titles are usually written. Sentence Case Capitalise the first letter of every sentence and lowercase the rest, just like normal writing. Remove Extra Spaces Squeeze repeated spaces and tabs down to a single space and trim the edges of each line. Number to Roman Numerals Type a whole number from 1 to 3999 and see it written as Roman numerals like I, V, X, L, C, D and M. Roman Numerals to Number Type a Roman numeral such as XIV and instantly see the everyday number it stands for. Number to Words Type a whole number and see it written out in words, the way you would on a cheque or a legal form. Words to Number Type a number written out in words, such as two thousand twenty four, and get the digits back.

Image Tools

Image Resizer Set a new width and height for your photo. Lock the aspect ratio to scale proportionally, then download the result - all processed locally in your browser. Image Compressor Re-encode a photo as JPEG or WebP at a quality you choose to cut its file size. The tool shows the size before and after, and everything stays in your browser. Image Converter Pick a target format - PNG, JPEG or WebP - and convert your image with one click. Conversion happens entirely in your browser, so your files stay private. Flip Image Mirror your image left-to-right or top-to-bottom with a single click, then download it. The flip is done in your browser and nothing is uploaded. Rotate Image Turn your photo with the 90, 180 and 270 degree presets or type any custom angle, then download the rotated image. Everything is processed locally in your browser. Image to Base64 Turn any image into a Base64 data URI for embedding directly in HTML or CSS. Optionally wrap it as a CSS background, then copy it - all done in your browser.

Color Tools

Color Converter Choose a color or paste a HEX value to see its RGB and HSL equivalents instantly. HEX to RGB Paste a HEX color (with or without the # sign) and we will show you the matching red, green and blue numbers right away. RGB to HEX Enter your red, green and blue numbers and get back the matching HEX code in seconds, perfect for the web.

Generators

Password Generator Create a strong random password. Choose the length and character types; generation happens in your browser. QR Code Generator Paste a link or any text, pick a size, and get a scannable QR code you can download as a PNG. Generation happens entirely in your browser. UUID Generator Create random RFC 4122 version 4 UUIDs. Choose how many you need and copy them instantly; they are generated locally in your browser. Lorem Ipsum Generator Create dummy lorem ipsum text for designs and mockups. Choose paragraphs, sentences or words and copy the result; it all runs in your browser. Random Number Generator Generate random whole numbers within a range you choose. Numbers come from your browser’s cryptographic random source, so nothing is uploaded.

Media

SRT to VTT Converter Paste or upload a SubRip .srt file and get clean WebVTT back. We add the WEBVTT header and convert the comma decimal separator in timestamps to a dot. Everything happens in your browser - nothing is uploaded. VTT to SRT Converter Paste or upload a WebVTT .vtt file and get a clean SubRip .srt back. We remove the WEBVTT header and NOTE blocks, convert the dot decimal separator in timestamps to a comma, and renumber cues from 1. Everything runs in your browser - nothing is uploaded.