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正規表現サポート付きでテキストを検索・置換する無料オンラインツール。
検索 置換 is a free online テキスト tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.
テキストツールは大きなファイルの処理に対応しています。1MB を越えるファイルは自動的に Web Worker を使用してバックグラウンドで処理され、UI がブロックされません。エンコーディング検出とバッチ処理も含まれています。
We noticed many online text tools send your content to remote servers for processing. Since privacy is our core principle, we built this tool to handle everything locally — your text stays on your device.
Writers and researchers organizing notes, references, and source material. Text often arrives messy — inconsistent spacing, mixed line endings, stray characters — and this tool applies the cleanup you need in one pass so you can focus on the content, not the formatting.
はい、完全無料で登録不要です。
はい、モバイルブラウザでタッチ操作に対応しています。
テキスト
非常に大きなテキスト（1MB以上）では、Web Workerをバックグラウンドで使用するため、UIは応答性を保ちます。
ToolPure supports UTF-8, UTF-16, ASCII, and Base64 encoding/decoding. The tools also support URL encoding, HTML entity encoding, and hex encoding for special characters.
The text tools can handle documents up to 5MB in size (approximately 5 million characters). Word count, character count, and line count update in real-time as you type or paste content.
Yes, the find and replace tool supports full regex syntax including capture groups, lookahead, and lookbehind. You can also perform case-sensitive or case-insensitive replacements with match highlighting.
Yes. 検索 置換 is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.
🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.
🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.