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txtnode Regex Tester

txtnode.com

Free plan Web
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Spec score 6.9 #20 of 23 in Regular Expression Testers

What it is

txtnode Regex Tester is a free browser tool for creating and checking regular expressions. Matches are highlighted as you type, and capture groups are shown alongside the result. Replacement strings can reference captures with $1 or $, with rewritten text previewed before applying a change. The tester uses JavaScript regular expressions as implemented by the browser and offers global, ignore case, multiline, dot all, unicode, and sticky flags. An incomplete pattern displays the browser engine’s error while preserving the previous result. The product page says pattern text and test data remain on your machine: the browser compiles and runs them without transmitting or storing what you enter. Suggested uses include validation rules, log filtering, bulk find-and-replace, and examining inherited patterns. The tool runs locally in a web browser, has no listed integrations, and has no premium tiers, usage limits, or hidden fees. Python, PHP, or Java patterns may need changes for JavaScript syntax.

Spec sheet

Purpose
A browser based tester that highlights regex matches as you type and shows capture groups.Read 8 Oct 2026 · txtnode.com
Integrations
The product page does not list integrations; it describes a browser based tool that runs locally.Read 8 Oct 2026 · txtnode.com
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.Read 8 Oct 2026 · txtnode.com
Support
Messages go directly to the maker by email, with no ticket system or chatbot.Read 8 Oct 2026 · txtnode.com
Availability
The maker says the tester is free and the tools have no premium tiers, usage limits, or hidden fees.Read 8 Oct 2026 · txtnode.com
Flags
The interface offers global, ignore case, multiline, dot all, unicode, and sticky flags.Read 8 Oct 2026 · txtnode.com
Limit
Patterns written for Python, PHP, or Java may need adjustment because the tester uses JavaScript regex syntax.Read 8 Oct 2026 · txtnode.com
Pattern errors
An incomplete pattern displays the engine error while preserving the existing result.Read 8 Oct 2026 · txtnode.com
Regex flavor
The tester uses JavaScript regular expressions as implemented by the user's browser.Read 8 Oct 2026 · txtnode.com
Replacement preview
Replacement strings support $1 and $<name> references, with rewritten text previewed before use.Read 8 Oct 2026 · txtnode.com
Use cases
The maker describes validation rules, log filtering, bulk find and replace, and understanding inherited patterns as use cases.Read 8 Oct 2026 · txtnode.com
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.Read 8 Oct 2026 · txtnode.com

Plans and prices

Free Free All tools free · no premium tiers, usage limits, or hidden fees Read 8 Oct 2026 · txtnode.com

Every txtnode Regex Tester plan and price →

Strong points and limits

Strong points

  • Highlights matches while typing
  • Shows capture groups
  • Previews replacement text
  • Runs without transmitting typed data
  • No premium tiers or usage limits

Limits

  • Uses JavaScript regex syntax only
  • Other-language patterns may need adjustment
  • Support has no ticket system or chatbot

Who it suits

It suits developers, writers, and anyone wanting a simple browser utility for regex work. It is useful for validation, log filtering, replacements, and checking existing patterns.

Verdict

txtnode Regex Tester offers local, immediate feedback for JavaScript regular expressions, including capture and replacement previews. Its free, browser-based design is straightforward, but patterns from other regex flavors may require rewriting.

Where Specifiction places it

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