Free Online Regex Tester
TxtTool
Test regular expressions in real time. See matches highlighted in your text.Updated 2026-03-20
Frequently Asked Questions
What flags?
g=global, i=case-insensitive, m=multiline.
Does it support all regex?
Yes, JavaScript regex syntax.
Free?
Yes, runs in browser.
How to Use
- Copy processed text or download
- Choose processing options
- Click Process to transform
- Check statistics panel
FAQ
Can I undo a transformation?
Original text stays in the input area. Copy it again or re-process with different settings.
Is there a character limit?
No hard limit. Processes text of any length, though 1M+ characters may take a moment.
Will formatting be preserved?
Text content is preserved. Some transformations may alter whitespace or line breaks.
Can I process text files?
Paste text directly or drag and drop a .txt file onto the input area.
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