Reference & Query

Look up international dialing codes and current local time for countries worldwide. Live UTC offsets computed in your browser, with daylight saving handled automatically.

Reference of HTTP request methods: GET, POST, PUT, DELETE and more.

Complete ASCII character table with decimal, hex and binary values.

Reference of world currencies with codes, symbols and exchange units.

Complete reference of world capitals with country names and currencies.

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

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

Reference of free public DNS servers with IPv4 and IPv6 addresses.

Reference of English phonetic symbols with example pronunciations.

Reference of common MIME types mapped to file extensions.

Quick reference of Redis data types and their core commands.

Interactive periodic table of the 118 chemical elements with properties.

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

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

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

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

Reference of HTTP Content-Type values for common file formats.

Convert pants and waist sizes between international sizing systems.

Reference of common TCP and UDP port numbers with service names.

Complete list of Adobe Photoshop keyboard shortcuts for Windows and Mac.

Quick reference of the most used Git commands with examples.

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

Quick reference of common Linux commands with examples for beginners.

Reference of common traffic and road signs with their meanings.

Convert ring sizes between US, UK, EU and diameter measurements.

Reference of vitamins, their functions, food sources and deficiency symptoms.

Live world time clock and meeting planner for major cities and IANA time zones. Compare business hours across the US, Europe, Asia-Pacific and more.

Browse beautiful gradient color schemes and copy the CSS instantly.

Reference table of URL percent-encoding escape characters.

Reference of Android manifest permissions with descriptions.

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

Reference of HTML escape entities for special characters and symbols.

Reference of public NTP time servers for clock synchronization.

Reference of US states with abbreviations, capitals and population data.