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Editorial Team
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Asked: 2026-05-14T19:56:02+00:00

Maybe this is just my unfamiliarity with unicode, so please correct me if I’m

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Maybe this is just my unfamiliarity with unicode, so please correct me if I’m mistaken.

Looking at http://json.org/, the spec says that a string can include “any UNICODE character”, but this confuses me.

  • JSON is a communication format
    correct? At the core of it,
    everything must translate down to
    bytes.
  • In contrast, UNICODE is a
    logical format and must be encoded to
    be able to transmit it, right?

So what did they mean there?

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1 Answer

  1. Editorial Team

    From the RFC:

    3.  Encoding

   JSON text SHALL be encoded in Unicode.  The default encoding is
   UTF-8.

   Since the first two characters of a JSON text will always be ASCII
   characters [RFC0020], it is possible to determine whether an octet
   stream is UTF-8, UTF-16 (BE or LE), or UTF-32 (BE or LE) by looking
   at the pattern of nulls in the first four octets.

           00 00 00 xx  UTF-32BE
           00 xx 00 xx  UTF-16BE
           xx 00 00 00  UTF-32LE
           xx 00 xx 00  UTF-16LE
           xx xx xx xx  UTF-8
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