文字数カウント (文字数チェッカー) is a free online character counting tool for Japanese text, officially positioned as a tool that can complete character count statistics, word count confirmation, line count checking, and byte count calculation within a single screen.
In terms of use, the official description says it is suitable for quickly confirming and advancing character count management in tasks with word count limits, such as writing reports, papers, blogs, SEO articles, and SNS post drafts.
Main capabilities include: real-time statistics of character count, line count, paragraph count, and byte count; counting by distinguishing character types such as hiragana, katakana, kanji, and alphanumeric characters; and it also supports counting character counts excluding line breaks and character counts excluding whitespace. For byte count, it can simultaneously calculate the results under various encodings such as UTF-8, UTF-16, Shift-JIS, EUC-JP, and JIS, and the official description says it can be used for data capacity estimation. The tool can also set a target character count and visually check completion progress through a progress bar, making it suitable for progress management when writing reports or papers. Statistical results can be copied and can also be exported in CSV format for saving and analysis.
File and format support: it can read .txt, .csv, .json, and .md files, up to a maximum of 10MB; text can also be entered or pasted directly into the text area.
The usage method is roughly as follows: enter or paste text into the text area, or read a text file through the file upload function; while inputting, statistical results such as character count, line count, byte count, and character types are displayed; optionally enter a target character count to view progress with a progress bar; finally, copy the results with the "統計結果复制" button, or save them with "CSV形式でダウンロード".
In terms of applicable scenarios, the official list includes checking word count limits and final confirmation before submission when writing university reports and graduation theses, checking word count limits for SEO articles and posts on SNS platforms (such as Twitter, Instagram, Facebook, etc.), as well as character count management for code comments and documentation, byte count calculation for multilingual support, database field length design, and API specification writing.
Regarding privacy, the official statement says that input content is processed within the browser.
Limitations and other information: the file upload limit is 10MB; official materials do not mention information such as pricing model, price, whether account registration is required, or whether an API or mobile app is provided, and this is not currently available.
