文字数カウント

文字数カウント is a free online tool that accurately measures character count, byte count, and line count for Japanese text in real time, all within the browser.

What is 文字数カウント?

文字数カウント (Character Count) is a browser-based web tool that takes Japanese text as input—either typed directly or uploaded from a file (.txt, .csv, .json, .md, up to 10 MB)—and outputs detailed statistics including character count, line count, paragraph count, byte counts across five encodings (UTF-8, UTF-16, Shift-JIS, EUC-JP, JIS), and breakdowns by character type (hiragana, katakana, kanji, alphanumeric, symbols/spaces). The tool processes all data locally; no text is sent to any server, ensuring full privacy. It is hosted on mojisuu-kaunto.com.

Key Features

• Real-time statistics — Character count, line count, paragraph count, and byte counts update instantly as you type or paste text.
• Multiple byte encodings — Simultaneously displays byte sizes for UTF-8, UTF-16, Shift-JIS, EUC-JP, and JIS encodings.
• Character type breakdown — Separately counts hiragana, katakana, kanji, alphanumeric characters, and symbols/whitespace.
• Target character count management — Set a goal and view a progress bar that changes color as you approach or exceed the target.
• File upload support — Upload .txt, .csv, .json, or .md files (up to 10 MB) to automatically populate the text area.
• Export options — Copy statistics to clipboard or download them as a CSV file for analysis in spreadsheet software.
• Exclusion modes — Provides three counts: total characters, characters excluding line breaks, and characters excluding both line breaks and whitespace.

Who is it for?

• Students writing reports or theses who need to adhere to strict character limits (typically measured excluding line breaks and spaces).
• Bloggers and content writers checking article length for SEO optimization or platform-specific constraints.
• Programmers and developers counting characters in code comments, documentation, or estimating byte sizes for database field lengths.
• Social media users verifying text fits within character limits on platforms like Twitter, Instagram, or Facebook.

What can you do with 文字数カウント?

• Academic reports: Paste or upload your draft, set a target word count, and monitor progress in real time; use the exclusion modes to match university standards.
• Blog posts: Write or edit articles while seeing immediate feedback on total characters and estimated reading time (calculated as 0 seconds for empty input).
• Programming tasks: Check the byte size of strings in UTF-8, Shift-JIS, or other encodings before inserting them into databases or APIs.
• SNS posts: Verify that your tweet or post stays under the platform's character limit before publishing.

FAQ

What is the difference between 'character count excluding line breaks' and 'character count excluding line breaks and spaces'?

The first excludes only newline characters (\n), while the second excludes both newlines and all whitespace (spaces, tabs, etc.). Most academic submission guidelines use the latter.

Does the tool store my text?

No. All processing happens locally in your browser. The text is never transmitted to any server and is deleted when you close the page or clear the input.

Can I upload Word documents?

The input area lists .txt, .csv, .json, and .md as supported formats. The FAQ mentions Word files (.docx) as readable; however, the main interface does not list .docx, so its support may be incomplete. For reliable results, convert Word documents to plain text first.

How accurate are the byte counts for Shift-JIS and other encodings?

UTF-8 and UTF-16 counts are exact. Shift-JIS, EUC-JP, and JIS byte counts are estimates based on character mapping and are practically accurate for common Japanese text, though edge cases may differ.

Is there a mobile version?

The tool is fully responsive and works on any device browser, including smartphones and tablets.