Reference & Query

Convert between decimal degrees and degrees-minutes-seconds format.

Browse beautiful gradient color schemes and copy the CSS instantly.

Collection of User-Agent strings for browsers, crawlers and devices.

Reference of ISO country codes, dialing codes, time zones and domains.

Calculate the possible blood types of a child from the parents blood types.

Calculate monthly car loan payments, total interest and payoff schedules.

Convert shoe sizes between US, UK, EU and CM measurement systems.

Browse named colors with their hex and RGB values. Free color reference.

Collection of ready-to-use regular expressions for common validation tasks.

Interactive periodic table of the 118 chemical elements with properties.

Quick reference of the most used Git commands with examples.

Quick reference of Redis data types and their core commands.