How to Use the Character Counter
Simply type or paste your text into the text area. Character count updates in real-time — no button clicks needed. You'll see characters (with/without spaces/whitespace), lines, paragraphs, words, reading time, manuscript page count, and byte count (UTF-8/Shift-JIS) all at once. Use the copy button next to each value to copy it to your clipboard.
Full-Width vs Half-Width Characters
In standard mode, both full-width and half-width characters count as one character each. The 'Half-width equivalent' mode counts full-width as 2 and half-width as 1, giving you a byte-like sense of text volume. X (Twitter) uses a unique 'weight' system. Full-width characters (Japanese, Chinese, etc.) weigh 2 units each, while half-width characters (ASCII letters, numbers) weigh 1 unit, with a maximum of 280 weighted units per post. This means you can post up to 140 full-width characters or 280 half-width characters. URLs are always counted as exactly 23 characters regardless of their actual length. This tool fully complies with the official X specification.
Social Media Character Limits (2026)
This tool checks character limits for 8 major social media platforms in real-time. A progress bar shows remaining characters as you type, helping you avoid going over the limit before posting.
| プラットフォーム | 上限 | 備考 |
|---|---|---|
| X / Twitter (Free) | 140 full-width (280 weighted) | URLs = 23 chars |
| 2,200 chars | Caption | |
| Meta Description | 120 chars recommended | SEO |
| LINE | 10,000 chars | Message |
| TikTok | 4,000 chars | Caption |
| Note | 20,000 chars | Article |
| YouTube | 5,000 chars | Description |
| Threads | 500 chars | Post |
Manuscript Pages & Reading Time
The 'Manuscript pages' metric is based on the standard Japanese genkō yōshi (400 characters per page, 20 columns × 20 rows). For example, 1,200 characters equals 3 manuscript pages. This is useful for gauging the length of reports and papers. Reading time is calculated at 500 characters per minute for Japanese text (based on NHK broadcast speed) and 250 words per minute for English text. Use it to estimate how long blog posts or presentation scripts will take to read.
Frequently Asked Questions
- How do I count characters?
- Simply type or paste text into the text area above. Character count, line count, and word count update in real-time. No button clicks needed.
- Does character count differ between full-width and half-width characters?
- This tool counts each full-width and half-width character as one. In 'Half-width equivalent' mode, full-width characters count as 2 and half-width as 1. On X (Twitter), full-width characters weigh 2 and half-width characters weigh 1, with a maximum of 280 weighted units.
- What is the character limit for X (Twitter)?
- X (Twitter) free plan posts have a limit of 140 full-width characters (280 half-width characters). URLs are always counted as 23 characters regardless of length. This tool follows the official X character counting specification.
- Is my input text sent to a server?
- No. All text processing happens entirely in your browser. Your data is never sent to any server.
- How many characters fit on one manuscript page?
- A standard Japanese manuscript page (genkō yōshi) has 400 characters (20 columns × 20 rows). This tool calculates pages based on 400 characters per page.
- How is reading time calculated?
- Japanese text is calculated at 500 characters per minute (NHK standard). English text is calculated at 250 words per minute.