The whole set of 127 ASCII characters. Table shows decimal (DEC), hexadecimal (HEX), octal (OCT) and binary (BIN) indexes, but also HTML entities (in 3 different formats), ANSI-C entities and ASCII descriptors.
Calculator encodes given plain text using BASE64 algorithm or vice versa. Unicode characters are encoded as UTF-8 before BASE64 encoding is applied.
Table shows common constants used in physics and chemistry.
Binary prefixes - kibi, mebi, gibi, tebi etc.
Table shows how to write ASCII characters in Braille. In addition to standard international characters, polish diactritic character are presented.
Calculator allows you to translate given plain text into Braille.
Table shows list of ISO 3166-1 and ISO 3166-2 codes assigned to different countries.
Table shows list of ISO 4217 codes assigned to different currencies such as EUR for Euro, USD for american dollar etc.
Calculator shows internal representation of IEEE 754 floating point numbers, as it is stored in computer's memory. You can see binary, hexadecimal and decimal dump of the number including split into sign, exponent and mantisa parts. Both single and double floating numbers are supported.
Table summarizes GS1 country codes also known as barcode prefixes.
Table summarizes formats of IBAN (International Bank Account Number) numbers used in different countries.
Calculator splits given account number (IBAN) into parts such as ISO country code, check digits etc.
The whole set of ISO 8859-2 (Latin-2) characters. Table shows decimal (DEC), hexadecimal (HEX), octal (OCT) and binary (BIN) indexes, but also HTML entities (in 3 different formats), ANSI-C entities, unicode (HEX, OCT and DEC) and textual descriptors.
The online calculator for checking correctness of ID numbers. It validates: IBAN (bank account number), EAN (article), ISBN (book), ISMN (music), ISSN (serial). Just enter the code (with or without any dots, spaces, slashes etc.) and in a moment you will know, if it is a valid code and which one of them.
MTU (Maximum Transmission Unit) values assigned to given network type.
Table shows common Morse codes for letters, digits and selected special codes such as international SOS signal.
Calculator encodes given text message into Morse codes or vice versa. You can also hear (beeps) and see (as sequence of light pulses) your Morse encoded message. For better readability currently played Morse character is highlighted (marked).
Table shows frequencies of music notes in twelve-tone equal tempered system (12-TET). Both basic tone and up to three harmonic frequencies are presented.
A metric units prefixes for numbers (SI prefixes).
Table shows common paper size standards such as A4, A5 etc.
Calculator encodes given domain using punycode algorithm or vice versa. Encoded domain name is ready to use with International Domain Name (IDN).
Comparison of different shoe size systems - European (EU), United Kingdom (UK, British), foot size in centimeters (CM) and few more.
Calculator finds out tire production date (year, weak and month) based on DOT index printed on your tire.
Table shows common list of top-level internet domains such as .com, .net or related to given region such as .pl or .de.
Table summarizes how to read load index codes printed on tyres and more.
Table summarizes how to read speed ratings codes printed on tyres and more.
Encode or decode given text using so-called URL-encode used widely to send data over internet e.g. for website addresses.
Table shows various units (kilogram, metre, ampere etc.) and corresponding physical quantities (measurements). Both basic SI and selected derivated units are presented.
Table shows list of well-known TCP and UDP ports with assigned applications. Both official standarized by IANA and unofficial, but popular ports are presented.
