Find text and replace it everywhere at once - optionally with a regular expression, locally with no upload.
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Find and replace is one of the most common text chores: swapping a term throughout, unifying a spelling or filling a placeholder everywhere with the same value. This tool replaces every match in your text at once - not just the first - and returns the result instantly.
By default the search is literal: special characters like dot or bracket count as that character itself. If you need more control, switch on the regular expression and you can work with patterns and refer to captured groups via $1, $2 in the replacement. Optionally you can ignore case, so differently spelled matches are caught too.
The whole replacement runs entirely locally in your browser in pure JavaScript - your text is not uploaded, not stored, and no foreign library is loaded from a CDN. If a pattern marked as a regular expression is invalid, the tool says so honestly instead of inventing a wrong result.
| Input formats | Text input |
|---|---|
| Output format | TXT |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: All matches are always replaced (global). In regex mode the JavaScript syntax (ECMAScript) applies; an invalid pattern leads to an honest error. In literal mode the dollar sign stays a normal character in the replacement. Very large texts are limited by your device memory.
No. The replacement runs entirely locally in your browser; your text never leaves your device and is not stored.
All of them. The search is always global, so every match in the text is replaced.
It allows search patterns instead of fixed text, and backreferences with $1, $2 to captured groups in the replacement. Without regex the search is literal.
In regex mode the tool reports an honest error instead of producing a wrong result. Check the brackets and escapes in the pattern.