Count Unicode Characters
Count Unicode Characters & Bytes Instantly
Confused why your JavaScript code says a single Emoji (👋) has a length of 2? Or why a database column overflows despite having “enough characters”? This tool analyzes text at the Grapheme Cluster level, giving you the true character count and accurate Byte Size (UTF-8/16/32) for database optimization.
How to Measure Text
- Enter Text: Paste your tweet, code snippet, or database entry into the input field.
- Analyze: The tool instantly breaks down the string into Code Points, Code Units, and Visual Graphemes.
- Check Limits: Verify if your text fits within specific Byte limits (e.g., MySQL VARCHAR) or Character limits (e.g., Twitter/X).
Why “String.length” is Wrong
In most programming languages (like JavaScript or Java), the `.length` property counts 16-bit Code Units, not actual characters.
Standard characters (A-Z) fit in one unit. However, Emojis and rare symbols live in the “Astral Planes” of Unicode and require two units (a Surrogate Pair). Furthermore, complex glyphs use Combining Marks (like accents). This tool uses the Intl.Segmenter API to count what humans perceive as a single character (a Grapheme Cluster).
Graphemes vs. Code Units
| Character | JS .length (UTF-16) | Visual Count (Grapheme) |
|---|---|---|
| A (Latin) | 1 | 1 |
| 👍 (Emoji) | 2 (Surrogate Pair) | 1 |
| 👨👩👧👦 (ZWJ Sequence) | 11 (Multiple Codes) | 1 |
Frequently Asked Questions
Q. Why does byte count matter?
Databases often store text with a byte limit (e.g., `VARCHAR(255)` in UTF-8). Since one emoji can take 4 bytes, you might run out of space much faster than expected if you only count characters.
Q. Does this support Chinese/Arabic?
Yes. These languages often use 3 bytes per character in UTF-8. This tool accurately calculates the storage requirements for multi-byte languages.