Internationalization tools

This page lists various tools related to internationalization that may be helpful. They are not maintained or owned by the W3C, and the links are provided with no guarrantees.

Fonts

• Font lister
  Browser-based app. Provides a (not exhaustive) list of fonts, grouped by script, that are available via the Windows and macOS operating systems, as well as Google's Noto fonts and SIL fonts. Note that some of the Windows and macOS fonts have to be downloaded by the user before they can be applied to text.

Characters & encoding

• Unicode code converter
  Browser-based app. Converts between characters, Unicode code point numbers, UTF-8 and UTF-16 code units in hex, Numeric Character References (hex and decimal), percent-encoded text, and other character escape formats.

• UniView
  Browser-based app. UniView is a Unicode character viewer/picker that displays characters from a selected range or search pattern, provides information about them, and allows you to assemble strings from them like in a character map. You can also create customizable lists of characters for pasting into documents. UniView supports the latest version of the Unicode Standard, including the supplementary planes as well as the BMP. Characters are displayed as graphics by default, but you can also display them using an installed font.

• Analyse string tool
  Browser-based app. Lists the characters in text that you paste into the large box at the top, and produces information about each character.

• Encoding converter
  Browser-based app. Allows you to see how Unicode characters are represented by bytes in various legacy encodings, and vice versa. You can customise the encodings. The algorithms used are based on those described in the Encoding specification, and thus describe the behaviour you can expect from web browsers.

• List characters tool
  Browser-based app. Analyses the characters in text that you paste into the large box at the top, and produces a list of what characters were used, grouped by Unicode block. It also allows you to compare two lists of characters.

Language tags

• IANA Language Subtag Registry search tool
  Browser-based app. Look for subtags by searching on the descriptions in the registry. Look up subtags and sequences of subtags. List the various types of tag currently available. Runs on the most up-to-date version of the registry.

Grapheme segmentation

• Grapheme segmenter
  Browser-based app. Parses a string and shows extended grapheme cluster boundaries.

Other

• W3C Internationalization Checker
  Performs various tests on a Web Page to determine its level of internationalisation-friendliness. It also lists key internationalization settings related to character encoding, language declarations, text direction and class/id names. This information includes HTTP headers, which can be particularly useful for troubleshooting problems.

• Counter styles converter
  Browser-based app. Allows you to convert ASCII numbers into other representations that can be used to create counters for ordered lists, headings, figures, etc. It uses the algorithms described by CSS3 Counter Styles and Predefined Counter Styles.

• Unicode character pickers
  Browser-based apps. The pickers allow you to produce, analyse and manipulate runs of text for a given language or script. The pickers support well over 100 orthographies in over 90 different scripts. They are particularly useful for people not familiar with a script, but the analysis functions, conversion tools, etc, are also helpful to more experienced users.

• IPA Analyser
  Browser-based app. Parses an IPA (International Phonetic Alphabet) string and indicates the meaning of each symbol, with links to detailed information.