Convert Unicode to Hex

Hex is denser (4-6 digits vs up to 7 digits decimal) and groups by bytes – easier for spotting character ranges. The Unicode standard documents codepoints as hex (U+0041). Decimal is friendlier for code that does arithmetic on codepoints.

The official Unicode standard notation. U+0041 means “Unicode codepoint hex 41” = A. The U+ makes it unambiguous you’re talking about Unicode, not just hex bytes.

4-digit (default) handles 99% of cases – every BMP character (U+0000 through U+FFFF) fits in 4 hex digits. 6-digit accommodates emoji and other supplementary-plane characters that need 5-6 digits. Mixed-width works too with “None” padding.

It strips common prefixes (U+, 0x, u, u{...}) automatically, then parses the remaining hex digits. So U+41, 0x41, A, u{41}, and raw 41 all decode to A.

Yes. for…of iteration + String.fromCodePoint handle supplementary-plane characters (emoji) without surrogate pair issues.

U+10FFFF (1,114,111 decimal). Above is invalid Unicode and rejected.

The codepoint converter supports 7 output formats (HTML/CSS/JS/Python escapes). This tool focuses on hex with prefix/padding/case options. Use this when you specifically need hex output for a target syntax.

No. Zero network requests. All conversion in browser.

Yes. 16 KB total. Load once, disconnect, use forever.

Indirectly – pick 0x prefix, 4-digit padding, lowercase, then prepend &#x and append ; in your code. Or use the dedicated codepoint converter for direct HTML entity output.