All Tools

Combine multiple PDF files into one, in the order you choose.

Split a PDF into separate files by page range, delivered as a zip.

Check an image's file size, dimensions, format, and color mode instantly.

Upload an image to instantly extract its dominant color palette.

Reduce the file size of a JPG or PNG image, with a choice of compression level.

Calculate your Body Mass Index from your weight and height, in metric or imperial units.

Calculate an exact age in years, months, and days from a birth date.

Calculate what a given percentage of a value is.

Calculate the monthly payment and total interest on a fixed-rate loan.

Convert an angle value between degrees, radians, gradians, and turns.

Convert an area between square meters, square kilometers, square feet, square yards, and acres.

Convert a data size between bytes, kilobytes, megabytes, gigabytes, and terabytes.

Convert a density value between kilograms per cubic meter, grams per cubic centimeter, pounds per cubic foot, and kilograms per liter.

Convert an energy value between joules, kilojoules, calories, kilocalories, and watt-hours.

Convert a flow rate value between liters per second, cubic meters per hour, gallons per minute, and cubic feet per minute.

Convert a force value between newtons, kilonewtons, pound-force, and kilogram-force.

Convert a frequency value between hertz, kilohertz, megahertz, and gigahertz.

Convert a fuel efficiency value between miles per gallon, kilometers per liter, and liters per 100 kilometers.

Convert a length between meters, feet, inches, kilometers, centimeters, miles, and yards.

Convert a power value between watts, kilowatts, horsepower, and megawatts.

Convert a pressure value between pascals, atmospheres, bars, and pounds per square inch.

Convert a speed between kilometers per hour, miles per hour, meters per second, and knots.

Convert a temperature between Celsius, Fahrenheit, and Kelvin.

Convert a time duration between seconds, minutes, hours, days, and weeks.

Convert a torque value between newton-meters, foot-pounds, inch-pounds, and kilogram-force meters.

Convert a volume between liters, milliliters, cubic meters, gallons, and cubic feet.

Convert a weight between kilograms, grams, pounds, and ounces.

Paste or type your text below to instantly count its words.

Paste or type your text below to instantly convert its case.

Convert text to binary or binary back to text, UTF-8-safe for any language or emoji.

Enter any text or URL to instantly generate a downloadable QR code.

Convert between Unix timestamps and human-readable dates, entirely in your browser.

Generate a random, cryptographically-secure password entirely in your browser.

Check how strong a password is, with live feedback, entirely in your browser.

Download a YouTube video by URL. YouTube's own bot-detection means some downloads need a retry.

Check whether a page title is the right length for search engine results.

Generate a ready-to-paste HTML meta tag snippet from a title, description, and keywords.

Convert any text into a clean, URL-friendly slug.

Analyze a piece of text and get its Flesch reading-ease and Flesch-Kincaid grade-level scores.

Generate Open Graph / Twitter Card meta tags so your page looks right when shared on social media.

Preview how a page might appear as a Google search result.

Analyze how often each keyword appears in your text, as a percentage of total word count.

Extract the top ranked key phrases from a piece of text using the RAKE algorithm.

Audit a URL's meta tags, heading structure, broken links, sitemap, image alt text, and page speed.

Check whether a website is currently up or down for everyone.

Look up A, AAAA, MX, TXT, NS, and CNAME records for a domain.

Check a domain's SSL/TLS certificate - validity, issuer, and expiry.

Look up a domain's registrar, creation and expiration dates, and name servers. Registrant organization is often withheld for privacy (GDPR).

Look up who owns or operates an IP address - ASN, network name, CIDR block, country, and abuse contact. Does not return city-level location or geolocation data.

Measure DNS, connection, and time-to-first-byte timing for a website.

Percent-encode a URL for safe use in links and query strings, or decode one back to its original form.

Check whether a URL is well-formed and reachable.

Check your text for grammar, spelling, and style issues, and get a corrected version.

Get AI-generated related keyword suggestions with estimated volume and competition for a seed keyword.

Get AI-generated blog title, video concept, and social post ideas for a topic.

Get AI-generated hashtag and content idea suggestions for a topic across Instagram, TikTok, Twitter/X, and Facebook.