在线免费查找与替换

Yes. Enable regex mode and use standard JavaScript regex syntax. For example, find \d+ to match any number sequence, or use capture groups: find (\w+) (\w+) and replace with $2 $1 to swap two words.

It matches the search term only when surrounded by word boundaries (spaces, punctuation, or start/end of string). Searching "cat" with whole-word will match "cat" but not "concatenate" or "scatter".

Yes. Leave the Replace field empty and click Replace All to delete all instances of the search term.

The tool handles texts up to several hundred thousand characters comfortably. For very large files (10+ MB), performance may slow — consider a code editor like VS Code for bulk replacements in large files.

Yes. Click Undo or press Ctrl+Z to revert the last replacement operation. The original text is preserved in memory until you clear the input.

Yes, the 查找与替换 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.

即时在任何内容中查找和替换文本。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.

No installation needed. The 查找与替换 runs entirely in your web browser on any device — desktop, tablet, or mobile.

Completely safe. The 查找与替换 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.

After the page loads for the first time, the 查找与替换 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.

The 查找与替换 has no hard character limit — it processes text as large as your browser can handle, typically hundreds of thousands of characters. Very large inputs may be slower depending on your device.

Yes. The 查找与替换 handles all Unicode text correctly, including accented characters, CJK characters, Arabic, Cyrillic, and emoji. It works with any language that your browser renders, with no additional setup or language packs required.

Yes. The 查找与替换 is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.

Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.