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txtnode Regex Tester
What it is
txtnode Regex Tester is a free browser tool for building and checking JavaScript regular expressions. It highlights matches as you type and shows capture groups, while a replacement preview displays rewritten text before use. Replacement strings can reference captures with $1 and $. The interface offers global, ignore case, multiline, dot all, unicode, and sticky flags. Incomplete patterns show the browser engine error while preserving the current result. The browser compiles and runs patterns locally; the product page says typed patterns and test data are not transmitted or stored. Suggested uses include validation rules, log filtering, bulk find and replace, and understanding inherited patterns. It runs on the web with no listed integrations, premium tiers, usage limits, or hidden fees. Because it uses JavaScript regex syntax, patterns written for Python, PHP, or Java may require adjustment. Support is available by emailing the maker.
For and against
For
- Highlights matches while typing
- Shows capture groups
- Previews replacement results
- Runs locally in the browser
- No premium tiers or usage limits
Against
- Uses JavaScript regex syntax only
- Other-language patterns may need adjustment
- No listed integrations
- Email support has no ticket system or chatbot
The verdict
txtnode Regex Tester offers focused, local regex checking with useful match, capture, flag, and replacement views. Its main constraint is JavaScript syntax, so patterns from other languages may need changes.
Who it suits
It suits developers who want a fast browser utility, along with writers and others who prefer simple tools. It fits anyone checking JavaScript regular expressions locally.
Plans and prices
Free
All tools free · no premium tiers, usage limits, or hidden fees
Read 8 Oct 2026 · txtnode.com
On the record
- Availability
- The maker says the tester is free and the tools have no premium tiers, usage limits, or hidden fees.txtnode.com · read 8 Oct 2026
- Flags
- The interface offers global, ignore case, multiline, dot all, unicode, and sticky flags.txtnode.com · read 8 Oct 2026
- Integrations
- The product page does not list integrations; it describes a browser based tool that runs locally.txtnode.com · read 8 Oct 2026
- Limit
- Patterns written for Python, PHP, or Java may need adjustment because the tester uses JavaScript regex syntax.txtnode.com · read 8 Oct 2026
- Pattern errors
- An incomplete pattern displays the engine error while preserving the existing result.txtnode.com · read 8 Oct 2026
- Privacy
- The product page says patterns and test data stay on the user's machine; the browser compiles and runs the pattern and does not transmit or store typed data.txtnode.com · read 8 Oct 2026
- Purpose
- A browser based tester that highlights regex matches as you type and shows capture groups.txtnode.com · read 8 Oct 2026
- Regex flavor
- The tester uses JavaScript regular expressions as implemented by the user's browser.txtnode.com · read 8 Oct 2026
- Replacement preview
- Replacement strings support $1 and $<name> references, with rewritten text previewed before use.txtnode.com · read 8 Oct 2026
- Support
- Messages go directly to the maker by email, with no ticket system or chatbot.txtnode.com · read 8 Oct 2026
- Use cases
- The maker describes validation rules, log filtering, bulk find and replace, and understanding inherited patterns as use cases.txtnode.com · read 8 Oct 2026
- Who it's for
- The maker says txtnode's developer tools are for developers who want fast browser utilities, alongside writers and people who prefer simple tools.txtnode.com · read 8 Oct 2026
