Input and result
Use TEXT, REGEX input to produce JSON. Run JavaScript regular expressions against sample text in an isolated time-limited worker and review match positions and groups.
All toolsRegex Tester · Free online tool
Regex Tester online
Run JavaScript regular expressions against sample text in an isolated time-limited worker and review match positions and groups.
Local processingNo uploadNo watermark
Browser processing ready
Three simple steps
How to use the Regex Tester tool
No software, signup or hand-holding required.
01
Enter your data
Paste the text or structured data you want to process.
02
Adjust and process
Choose useful settings, then let your browser create the result.
03
Download instantly
Review the output and save one file or the complete batch.
What to expect
A focused Regex Tester workflow
Practical limitation
This browser utility is designed for development and testing. Validate security-sensitive output within your own application before production use.
Common questions
Good to know
Answers specific to this tool and its current capabilities.
What does the Regex Tester process locally?+
Regex Tester processes the entered values in your browser memory and does not send the source or result to ToTube Tools.
What should I know before using the Regex Tester?+
Expressions run in an isolated worker with input, pattern, match-count and time limits to reduce the risk of runaway evaluations.
Can I copy or download the Regex Tester result?+
Yes. Regex Tester provides both a clipboard action and a named text, JSON, YAML or XML download when processing succeeds.