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Find & Replace in Many Files
Search and replace across many text files or a whole ZIP, with a diff preview, then download.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Find & Replace in Many Files works
Every file is read as UTF-8 text in your browser (binary files are skipped). Your rules run on each file and you can open any file to see a line diff of the changes. Folders inside a ZIP are kept when you download.
Input: TXT, MD, HTML, JS, CSV, ZIP. Output: ZIP, TXT.
How to use Find & Replace in Many Files
- Drop files or a ZIP.
- Add rules or a bulk list.
- Click files to check the diff.
- Download the changed files as a ZIP.
Tips
- Text never leaves your device, so it is safe for drafts and private notes.
Find & Replace in Many Files FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
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