YAML to TOML Converter
YAML config into TOML tables — the format Cargo, Hugo and pyproject.toml want.
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JSON to HTML Table Converter
Clean, escaped HTML table markup from JSON — flat columns or nested tables.
TSV to CSV Converter
Tab-separated to proper CSV, with quoting that survives commas and line breaks.
Whitespace Visualizer
Reveal tabs, non-breaking spaces and zero-width characters in your text.
Screen Resolution Checker
Your screen size, viewport, pixel ratio and which breakpoint is active.
Variable Name Converter
Convert a name between camelCase, snake_case, kebab-case and the rest.
IP Range to CIDR
Convert a start and end address into the smallest set of CIDR blocks.
IP to Binary Converter
See an IP address in binary, hex and decimal, octet by octet.
Clip Path Generator
Draw a clipping shape with draggable points and get the CSS.
Neumorphism Generator
Build soft extruded UI with paired light and dark shadows.
Query String Builder
Build and edit URL query strings without breaking the encoding.
curl to Code Converter
Turn a curl command into working fetch, axios, Python, PHP, Go or Ruby.
UUID Decoder
Identify a UUID's version and variant, and extract its timestamp.
Htpasswd Generator
Generate .htpasswd lines with bcrypt, APR1-MD5 or SHA-1.
SQL Minifier
Collapse a SQL query to one line and strip its comments.
SQL Formatter
Re-indent a SQL query into readable clauses, joins and conditions.
XML to JSON
Convert XML into clean JSON, with attributes and text handled predictably.
JSON to C# Class
Generate C# classes with System.Text.Json attributes from a JSON sample.
JSON to PHP Array
Convert JSON into a PHP array literal or a typed class you can paste into a project.
Budget Calculator
Where your money goes, against the 50/30/20 rule.
Sales Tax Calculator
Add sales tax to a price, or strip it back out.
Annuity Payout Calculator
The income a lump sum can pay, and for how long.
Payment Calculator
Solve for the monthly payment or for the term, either way.
Rental Property Calculator
Monthly cash flow, cap rate and cash-on-cash on a rental.
VA Mortgage Calculator
VA loan payment with the funding fee and no mortgage insurance.
Mortgage Payoff Calculator
See how much time and interest an extra payment removes.
Circle Calculator
Solve a circle from radius, diameter, circumference or area.
Army Body Fat Calculator
US Army AR 600-9 tape test, with the age and sex limits.
Discount Calculator
Work out sale prices, how much you save and stacked discounts.
Pregnancy Weight Gain Calculator
Recommended weight gain by week, from your starting BMI.
Greatest Common Factor Calculator
GCF by prime factorisation and the Euclidean algorithm.
Rounding Calculator
Round to decimals, significant figures or any multiple.
Half-Life Calculator
Half-life, decay constant, mean lifetime and remaining amount.
Confidence Interval Calculator
Intervals for a mean or a proportion, with the margin of error.
Z-score Calculator
Z-scores, percentiles and probabilities either way.
Surface Area Calculator
Surface area of ten solids, with the formula shown.
Dew Point Calculator
Dew point, humidity or temperature from the other two.
Wind Chill Calculator
How cold it feels, and frostbite risk at that temperature.
Mass Calculator
Mass from density and volume, force, or weight on any planet.
GDP Calculator
GDP by expenditure or income, plus real growth and per capita.
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