Character Counter (Lines & Bytes)
Count characters, lines, and bytes in real time — great for posts and drafts.
How to Use
Paste Your Text
Type directly or paste a draft, post, or note into the input box.
Check the Counts
Counts update automatically: characters (with/without spaces), lines, and bytes (UTF-8).
Copy and Use
"Copy" copies the input text. Use "Clear" to reset the input.
入力しながらリアルタイムで文字数を自動カウント。無駄のない文字数カウンター
テキストエリアに文字を打ち込む先から、また文章を貼り付けた瞬間に全体文字数を計測します。余計なボタン操作なしで動作し、メモ帳感覚でストレスなく扱えるシンプルで洗練されたインターフェースを採用しました。
X (旧Twitter)やInstagram、LINEなどSNSの文字数制限オーバー防止に
限られた文字数での表現が求められるSNSの投稿作成を強力にサポート。長文になりがちなスレッド投稿や、インスタグラムのキャプション、LINEの長文メッセージ送信前に文字量をサクッと測ることで、投稿時のエラーや文字切れを未然に防ぎます。
スペース（空白）や改行を含めない文字数の確認も簡単
レポートや論文、システムへのデータ入力などで「空白・改行を除いた純粋な文字数」が求められる場合も安心です。全体文字数と同時に、スペースを除去した文字数や行数、さらにはシステムエンジニア向けにUTF-8での「バイト数」まで一画面で一元管理できます。
FAQ
Is my data saved on a server when using this character counter?
No. This character counter tool runs entirely in your browser. Your text is never sent anywhere and is deleted when you close the page.
Can I use this for social media character limits?
Yes. Use “Characters (All)” as a baseline. Note that some platforms count URLs and other elements differently, so confirm on the posting screen for final accuracy.
How are emojis counted in this character counter?
This tool uses JavaScript `length` (UTF-16 code units). Emojis and combined characters may not match the “visual” character count.
Does this character count tool work on mobile devices?
Yes! This tool is fully responsive and works great on smartphones and tablets.
Why do symbols change in width conversion?
Unicode compatibility mappings can replace symbols with equivalent code points. If you’re pasting into another system, validate with sample text first.
Is random string strength sufficient?
It depends. Great for test data and placeholder IDs, but for auth tokens/passwords you should choose length/charset/generation method based on your security requirements.
Does character count include line breaks?
Typically yes. Counting rules vary by platform, so check both character count and byte count when needed.
Why does pasted text become garbled?
Encoding differences or hidden characters can cause issues. Cleaning up whitespace/line breaks often helps.
References
- Unicode Standard
Normative source for character systems and code points.
- Unicode UAX #15 (Normalization)
Official normalization behavior reference.
- WHATWG Encoding Standard
Standard for text encoding behavior in browsers.
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