How it works
Find and Replace — Bulk find and replace with regex and case options. All processing happens in your browser — no upload, no signup, no email required. Free forever.
Frequently asked questions
Does the replacement support regex backreferences?
Yes when 'Regex mode' is on. Use $1, $2, … to insert captured groups in the replacement string, just like in JavaScript's String.replace.
Can I do a case-preserving replace?
Not yet — we replace literally. Case sensitivity only affects matching. Toggle it off to match all variants and replace them with the same target text.
Is there a hard limit on the source length?
No. Replace runs in your browser, so the limit is your machine's memory. Multi-megabyte files work fine.
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