PrivConvert

Text tool

Regex Tester

Run a JavaScript regular expression and export matches as JSON.

Add your input

Your file stays in this browser.

Settings

Good to know1 file · 25 MB max
Upload a text, Markdown, HTML, CSS, or JavaScript file or paste textResult: JSON files
  • Your text stays in this browser while the tool runs.
  • Text previews are capped for responsiveness when output is large.

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How it works

How to use Regex Tester online

  1. Upload a text, Markdown, HTML, CSS, or JavaScript file or paste text. The tool validates the published file type and size limits before the run.
  2. 2 adjustable settings. Review these settings before processing.
  3. Run the tool in your browser, review the result, and download the json files.

Overview

Regex Tester with local-first browser processing

Run a JavaScript regular expression and export matches as JSON. Review supported input, output format, settings, browser requirements, and practical limits before starting.

Input

Upload a text, Markdown, HTML, CSS, or JavaScript file or paste text

Output

JSON files

Limits

1 file · 25 MB max

Best for

Regex Tester use cases

  • Prepare the json files for sharing, archiving, or another file workflow.
  • Process the job in your browser without creating an account.
  • Check the published limits before processing larger or unusual inputs: 1 file · 25 mb max.

Processing

What happens in your browser

PrivConvert uses RegExp for this workflow. 2 adjustable settings. No special browser capability is required for typical inputs

Your text stays in this browser while the tool runs.

Related tools

Case ConverterColor ConverterCSS Minifier and FormatterFind and Replace TextHTML Escape and UnescapeHTML to Markdown

FAQ

Regex Tester questions

See how privacy works

Is Regex Tester free to use?

Yes. This tool is free to use in your browser and does not require an account.

Are my files private?

Regex Tester uses RegExp in the browser. Selected files are processed locally when the required browser features are available, while application, library, model, security, and limited analytics requests may load separately.

What limits should I know about?

1 file · 25 MB max. Very large, encrypted, damaged, or unusual files may not be supported by every browser.