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Unicode Character Inspector, Codepoint & Zero-Width Detector

Inspect Unicode strings down to code points (U+XXXX), detect hidden zero-width spaces/bidi overrides, view UTF-8/UTF-16 byte sequences, and analyze grapheme clusters.

Unicode Standard 16.0 Ready

Warning: Hidden zero-width or non-printable characters detected in text! (3 invisible characters detected)

Code Points17

Grapheme Clusters16

UTF-8 Bytes23 B

Invisible / Zero-Width3

Input Text / Emojis / Symbols17 JS string code units

Detailed Character & Byte Sequence BreakdownShowing 17 items

#	Glyph	Codepoint	Unicode Block / Name	Category	UTF-8 Hex	UTF-16 Hex
1	s	U+0073	Basic Latin (ASCII)	Letter / Number	73	0073
2	e	U+0065	Basic Latin (ASCII)	Letter / Number	65	0065
3	c	U+0063	Basic Latin (ASCII)	Letter / Number	63	0063
4	u	U+0075	Basic Latin (ASCII)	Letter / Number	75	0075
5	r	U+0072	Basic Latin (ASCII)	Letter / Number	72	0072
6	e	U+0065	Basic Latin (ASCII)	Letter / Number	65	0065
7	INV	U+200B	Zero-Width Space (ZWSP)	Format	E2 80 8B	200B
8	u	U+0075	Basic Latin (ASCII)	Letter / Number	75	0075
9	s	U+0073	Basic Latin (ASCII)	Letter / Number	73	0073
10	e	U+0065	Basic Latin (ASCII)	Letter / Number	65	0065
11	r	U+0072	Basic Latin (ASCII)	Letter / Number	72	0072
12	INV	U+200C	Zero-Width Non-Joiner (ZWNJ)	Format	E2 80 8C	200C
13	n	U+006E	Basic Latin (ASCII)	Letter / Number	6E	006E
14	a	U+0061	Basic Latin (ASCII)	Letter / Number	61	0061
15	m	U+006D	Basic Latin (ASCII)	Letter / Number	6D	006D
16	e	U+0065	Basic Latin (ASCII)	Letter / Number	65	0065
17	INV	U+FEFF	Zero-Width No-Break Space (BOM)	Format	EF BB BF	FEFF

Private Local Inspection

Your sensitive tokens, database fields, and credentials are decomposed purely within client JavaScript memory. Zero external transmissions.

Zero-Width & Security Auditing

Instantly spots invisible characters (ZWSP, ZWNJ, BOM) often used in homograph attacks, copy-paste syntax tampering, and hidden watermarks.

Byte-Level Serialization

Displays variable-length UTF-8 encodings (1 to 4 bytes) alongside UTF-16 surrogate pairs for diagnosing encoding corruptions.

Technical Reference & Architecture Guide

Unicode Character, Codepoint & Zero-Width Technical Guide — Reference Guide

Technical guide to Unicode planes, surrogate pairs, grapheme clusters, zero-width joiners (ZWJ), and UTF-8/UTF-16 encoding schemes.

Key Parameters & Controls

textstring

Arbitrary text sequence containing Unicode glyphs, symbols, or emojis.

codepointFormatenum ('U+XXXX' | 'Decimal')

Format of the numerical scalar value representing the Unicode character.

detectInvisibleboolean

Flag zero-width spaces (ZWSP), joiners (ZWJ), non-joiners (ZWNJ), and bidi overrides.

byteEncodingenum ('UTF-8' | 'UTF-16')

Target byte serialization standard.

Pro Tips & Best Practices

Modern emojis (e.g. 👨‍👩‍👧‍👦) are composed of multiple code points joined together with Zero-Width Joiners (U+200D).

Always test strings for hidden zero-width characters (U+200B, U+FEFF) when validating usernames or passwords.

Use Intl.Segmenter in modern JavaScript to count perceived user characters (grapheme clusters) rather than raw string.length.

Common Gotchas & Troubleshooting

Characters above U+FFFF are encoded as two UTF-16 code units (surrogate pairs). Use Array.from(str) or Intl.Segmenter.

Look for zero-width spaces or non-breaking spaces (U+00A0) that mimic regular ASCII spaces.

Frequently Asked Questions

What is a codepoint?▼

A unique numerical index assigned to every character in the Unicode standard, written as U+XXXX.

What is the difference between length and grapheme clusters?▼

length counts UTF-16 code units, while grapheme clusters represent visually distinct characters perceived by users.

What are zero-width characters?▼

Characters like U+200B (Zero-Width Space) or U+200D (ZWJ) that occupy zero horizontal pixels on screen.

Is text data sent to an analysis server?▼

No. The entire Unicode inspection and byte decomposition run client-side in your browser.

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