Upcoming
Angle Converter
Convert degrees, radians, gradians, turns and arc minutes.
Upcoming tools
42 tools are planned and being built. They aren't ready to use yet; each one will get its own page when it is. Until then, the tools in the same category may help.
Converters
Tools available now- Upcoming
Frequency Converter
Convert hertz, kilohertz, megahertz, gigahertz and RPM.
- Upcoming
Power Converter
Convert watts, kilowatts, horsepower and BTU per hour.
- Upcoming
Force Converter
Convert newtons, kilonewtons, pound-force and dynes.
- Upcoming
Torque Converter
Convert newton-metres, pound-feet and kilogram-force metres.
- Upcoming
Density Converter
Convert kg/m³, g/cm³, lb/ft³ and other density units.
- Upcoming
Flow Rate Converter
Convert litres per minute, cubic metres per hour and gallons per minute.
- Upcoming
Data Transfer Rate Converter
Convert Mbps, MB/s, Gbps and other data transfer rates.
- Upcoming
Shoe Size Converter
Convert shoe sizes between US, UK, EU and centimetres.
Generators
Tools available now- Upcoming
Dice Roller
Roll any number of dice with any number of sides.
- Upcoming
Coin Flipper
Flip a fair coin once or many times and count the results.
- Upcoming
Random Team Generator
Split a list of names into random, balanced teams.
- Upcoming
Username Generator
Generate readable, random usernames from word lists.
- Upcoming
Test Data Generator
Generate fake rows of test data as JSON or CSV.
- Upcoming
Placeholder Image Generator
Make placeholder images of any size, color and label.
- Upcoming
Random Date Generator
Pick random dates between two dates.
SEO Tools
Tools available now- Upcoming
HTML to Markdown Converter
Convert HTML into clean Markdown.
- Upcoming
Heading Outline Checker
See a page's heading outline (H1–H6) and spot skipped levels.
- Upcoming
Link Extractor
List every link in a piece of HTML, with its anchor text.
- Upcoming
.htaccess Redirect Generator
Write 301 and 302 redirect rules for Apache .htaccess files.
- Upcoming
security.txt Generator
Create a security.txt file so researchers can report issues.
- Upcoming
Web App Manifest Generator
Build a manifest.webmanifest for an installable web app.
Image Tools
Tools available now- Upcoming
Image Watermark
Add a text watermark to an image, in your browser.
- Upcoming
Blur and Pixelate Image
Blur or pixelate parts of an image to hide private details.
- Upcoming
Image Filters
Apply grayscale, sepia, brightness and contrast filters to an image.
- Upcoming
Add Border to Image
Add a colored border or padding around an image.
- Upcoming
Image Grid Splitter
Split an image into a grid of equal tiles.
Productivity Tools
Tools available now- Upcoming
Day of the Week Calculator
Find the weekday of any date, past or future.
- Upcoming
Add or Subtract Days Calculator
Add or subtract days, weeks, months or years from a date.
- Upcoming
Julian Date Converter
Convert calendar dates to Julian day numbers and ordinal dates, and back.
- Upcoming
Sunrise and Sunset Calculator
Sunrise, sunset and day length for a place and date.
- Upcoming
Moon Phase Calculator
The moon phase and illumination for any date.
- Upcoming
Military Time Converter
Convert between 24-hour military time and 12-hour time.
- Upcoming
Printable Calendar Generator
Make a monthly or yearly calendar to print or save as PDF.
Science Tools
Tools available now- Upcoming
Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles or temperature.
- Upcoming
Molarity Calculator
Find molarity, moles, mass or volume for a solution from the other values.
- Upcoming
Dilution Calculator
Work out a dilution with C₁V₁ = C₂V₂: how much stock and solvent to use.
- Upcoming
pH Calculator
Convert between pH, pOH and hydrogen or hydroxide ion concentration.
- Upcoming
Projectile Motion Calculator
Range, maximum height and flight time from launch speed and angle.
- Upcoming
Free Fall Calculator
Time, speed and distance of an object falling without air resistance.
- Upcoming
Specific Heat Calculator
Heat energy, mass, specific heat or temperature change with Q = mcΔT.
- Upcoming
Gravitational Force Calculator
The pull between two masses with Newton's law of universal gravitation.