Characters versus bytes
A Japanese character is normally one character but three UTF-8 bytes. Use the number the form explicitly asks for.
JAPANESE CHARACTER COUNTER
Stay inside the form’s limit.
Paste your text, set the limit shown by the form, and see immediately whether it fits.
✓ Free✓ No signup✓ Runs in your browser
9 / 2011 characters remaining
- Total characters
- 9
- Full-width
- 3
- Half-width
- 5
- Spaces
- 1
- Latin characters
- 5
- Japanese characters
- 3
- UTF-8 byte length
- 15
COUNTING RULE
Characters are counted as people see them.
This tool counts Unicode code points, including spaces. Full-width and half-width totals exclude spaces so they match the most useful form-debugging breakdown. Some legacy systems enforce byte limits separately, so UTF-8 bytes are shown as a secondary reference.
20文字以内 AND OTHER LIMITS
How do Japanese form character limits work?
20文字以内 means no more than 20 characters. Unless the form documents a special rule, assume spaces and punctuation count.
Full-width versus half-width
Width does not change this tool’s total character count. Both Ａ and A count as one character.
Emoji and combined text
Some emoji contain multiple code points. A particular website may count them differently or reject them entirely.