Developer Tools
Regex Tester
Try a regular expression against real text and see its matches and captured groups as you edit.
On your device
Free online tool · No signup
Find & Replace
Replace a word everywhere at once, or use a pattern to make bigger text edits without doing them by hand.
- Live match count
- Case-sensitive option
- Regular expression support
Works in your browser · Your files stay hereFree · No account · No daily task limit
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How to use Find & Replace
- Paste your text and enter what to find.
- Optionally enable regular expressions or case matching.
- Copy the result — the match count updates live.
Privacy
This tool runs entirely in your browser. Your file is processed on your device and is not uploaded to a server. You do not have to take that on trust — the monitor directly beneath the tool reads your browser’s own record of every request this tab made while your file was open.
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Text & Writing
Text Cleaner
Tidy messy pasted text: remove extra spaces, fix line breaks, strip HTML tags and straighten curly quotes.
On your device
Text & Writing
Remove Duplicate Lines
Clean up a list by removing repeated lines, while keeping the first appearance of each item.
On your device