Find & Replace

📖 Tool Introduction

Find & Replace is a completely free, instant-use online text replacement tool that helps you locate a target phrase inside long documents and replace every occurrence in one pass. It supports three advanced matching modes: case-sensitive matching, whole-word matching and regular expressions. Whether you are unifying terminology across an article, correcting repeated mistakes in a manuscript, or renaming variables and comments across a block of source code, the job is finished in a moment with an exact count of the replacements performed. The tool shows a live match counter and an instant preview of the converted text, so every change is visible and verifiable. All processing happens entirely in your browser — your text is never uploaded to any server, and your privacy is fully protected. The interface is clean and straightforward, available in Simplified Chinese, Traditional Chinese and English, automatically follows the website theme colour and corner-radius style, and works well on both desktop and mobile. No registration and no installation are required — just open it and paste your text. It is a high-frequency practical tool for editors, translators, programmers and office workers. A built-in example demonstrates all three matching modes in a single click, and the complete workflow — paste, configure, replace, copy — takes only seconds. Because everything runs offline, the tool also performs flawlessly on slow connections and in fully air-gapped environments, making it a dependable choice for sensitive documents. For repetitive editing sessions, the Ctrl+Enter shortcut fires a replacement without ever touching the mouse, which keeps the whole process fast and fluid. No matter whether you work with a single paragraph or a lengthy manuscript, the tool stays responsive and never sends a single character outside your browser.

✨ Key Features

• Batch replacement: all matches are replaced at once, with a precise count reported
• Case sensitivity: optionally match exact letter case, ideal for English and code
• Whole-word matching: only complete words are replaced, so “cat” never damages “catalog”
• Regex mode: full JavaScript regular-expression support for complex fuzzy matching
• Instant preview: the output panel shows the fully converted text the moment you click
• Fully local: your text never leaves the browser, keeping privacy safe with zero uploads

📝 How to Use

1. Type the phrase you want to find into the Find field
2. Turn on case-sensitive, whole-word or regex mode as needed
3. Enter the replacement text into the Replace field, or leave it empty to delete matches
4. Paste the original text into the input area
5. Click Replace All and inspect the output area together with the replacement count

⚠️ Notes

• Find text required: when the find field is empty the tool shows a friendly message and performs no replacement
• Valid regex: an invalid regular expression produces a clear error instead of silent misbehaviour
• Whole-word boundaries: whole-word mode matches word boundaries, so use plain mode for continuous Chinese text
• Irreversible action: replacement never touches the original input area, so confirm the output before copying it
• Large text: very large documents are best processed in chunks to keep the browser responsive