Try GNU Libidn

This page allows you to try the string preparation, punycode encode/decode and ToASCII/ToUnicode operations of GNU Libidn. If you encounter a problem with this page, write a (detailed!) report to bug-libidn@gnu.org.

If you are interested in commercial support or enhancement of Libidn, you can contact me.

Free shrimp sandwiches are served over here (or here if you want the experimental flavour).

This page ignores any Accept-Charset headers sent by your browser. Instead, the Unicode repertoire encoded as UTF-8 is used. If you are using software that cannot handle this, you must select another MIME charset below. BIG5, ISO-2022-JP-2, ISO-8859-1, and KOI-8 are popular choices. I am sorry for the inconvenience.

Input

Output

$ CHARSET='UTF-8' idn --idna-to-ascii 'räksmörgås.josefßon.org' 2>&1
libidn 0.5.13
Copyright 2002, 2003, 2004, 2005 Simon Josefsson.
GNU Libidn comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of GNU Libidn under the terms of
the GNU Lesser General Public License.  For more information
about these matters, see the file named COPYING.LIB.
xn--rksmrgs-5wao1o.josefsson.org
$ 

Examples

• ISO-8859-1 example
• IBM850 (aka codepage 850) example (same as previous)
• T.61-8BIT example (same as previous)
• UTF-8 Euro example
• ISO-8859-15 Euro example (same as previous)
• EUC-JP example
• EUC-KR example
• UTF-8 Arabic (Egyptian)
• UTF-8 Simplified Chinese
• GB18030 Simplified Chinese (same as previous)
• UTF-8 Hebrew
• ISO-8859-8 Hebrew (same as previous)
• UTF-8 Russian (Cyrillic)
• KOI8-R Russian Cyrillic (same as previous)
• ECMA-CYRILLIC Russian Cyrillic (same as previous)
• UTF-8 Vietnamese
• VISCII Vietnamese (same as previous)
• UTF-8 Japanese
• EUC-JP Japanese (same as previous)
• SHIFT_JIS Japanese (same as previous)
• UTF-8 Czech
• ISO-8859-2 Czech (same as previous)
• UTF-8 Hindi Devanagari
• UTF-8 Lao
• UTF-8 Maltese Malti
• ISO-8859-3 Maltese Malti (same as previous)
• UTF-8 Greek
• ISO-8859-7 Greek (same as previous)
• U+2024 dot separator example

Error codes

  enum
  {
    PUNYCODE_SUCCESS = 0,
    PUNYCODE_BAD_INPUT,		/* Input is invalid.                       */
    PUNYCODE_BIG_OUTPUT,	/* Output would exceed the space provided. */
    PUNYCODE_OVERFLOW		/* Input needs wider integers to process.  */
  };


  typedef enum
  {
    STRINGPREP_OK = 0,
    /* Stringprep errors. */
    STRINGPREP_CONTAINS_UNASSIGNED = 1,
    STRINGPREP_CONTAINS_PROHIBITED = 2,
    STRINGPREP_BIDI_BOTH_L_AND_RAL = 3,
    STRINGPREP_BIDI_LEADTRAIL_NOT_RAL = 4,
    STRINGPREP_BIDI_CONTAINS_PROHIBITED = 5,
    /* Error in calling application. */
    STRINGPREP_TOO_SMALL_BUFFER = 100,
    STRINGPREP_PROFILE_ERROR = 101,
    STRINGPREP_FLAG_ERROR = 102,
    STRINGPREP_UNKNOWN_PROFILE = 103,
    /* Internal errors. */
    STRINGPREP_NFKC_FAILED = 200,
    STRINGPREP_MALLOC_ERROR = 201
  } Stringprep_rc;

  typedef enum
  {
    IDNA_SUCCESS = 0,
    IDNA_STRINGPREP_ERROR = 1,
    IDNA_PUNYCODE_ERROR = 2,
    IDNA_CONTAINS_NON_LDH = 3,
    /* Workaround typo in earlier versions. */
    IDNA_CONTAINS_LDH = IDNA_CONTAINS_NON_LDH,
    IDNA_CONTAINS_MINUS = 4,
    IDNA_INVALID_LENGTH = 5,
    IDNA_NO_ACE_PREFIX = 6,
    IDNA_ROUNDTRIP_VERIFY_ERROR = 7,
    IDNA_CONTAINS_ACE_PREFIX = 8,
    IDNA_ICONV_ERROR = 9,
    /* Internal errors. */
    IDNA_MALLOC_ERROR = 201
  } Idna_rc;