Unicode in JSON: Encoding, BOM, and Emoji Support
Unicode in JSON: UTF-8 encoding, BOM handling, emoji support, and \uXXXX escape sequences. How parsers handle multi-byte characters and surrogates.
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Tags: json, developer-tools, beginner
Unicode in JSON: Encoding, BOM, and Emoji Support JSON was designed to work with the full range of human language from the start. The specification (RFC 8259) requires that JSON text be encoded in Unicode. In practice, this means you can store names, addresses, and messages in any language, and emoji work just fine too. But there are a few encoding concepts worth understanding: which Unicode encoding to use, what the BOM is and why it causes problems, and how the escape sequence works for characters that need special handling. --- What Is Unicode? Unicode is a standard that assigns a unique number — called a code point — to every character used in human writing. The letter is U+0041. The character is U+00E9. The kanji is U+65E5. The emoji 🌍 is U+1F30D. Unicode defines over 140,000…
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