JSON Formatter
Format, minify, and validate JSON with optional key sorting.
- Browser-based
- No signup
Developer
Enter a JavaScript regular expression, choose flags, and paste sample text to see live matches with indices, capture groups, and highlighted text. Matching runs entirely in your browser.
Results update as you type. Nothing is stored or sent to a server.
2 matches
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#1 · index 14 · length 18
#2 · index 36 · length 19
Enter a JavaScript regular expression, choose flags, and paste sample text to see live matches with indices, capture groups, and highlighted text. Matching runs entirely in your browser.
Use the Regex Tester form near the top of this page. Enter the values you know, run the tool, and review the results panel. You can change inputs and run it again. Processing stays in your browser and is not uploaded to Utilnivo servers.
Example: open Regex Tester, enter a realistic set of inputs for your situation, and note the primary result. Change one input—such as an amount, rate, or option—and compare how the output changes so you can choose a scenario that fits your needs.
Second example: try edge cases that matter for your task—such as zero values, a different unit system, or a second file—and confirm the tool shows a clear result or a helpful validation message.
Enter a JavaScript regular expression pattern, optional flags, and sample text. Matches update as you type and show index, length, and capture groups. Highlighted text marks each match. Processing runs entirely in your browser.
This tool runs in your browser for convenience. Results are estimates or transformations based on the inputs you provide and may not cover every edge case.
Patterns use JavaScript regular expressions, including flags for global, ignore case, multiline, dot all, and unicode.
Yes. Numbered and named capture groups are listed for each match, along with the match index and length.
No. Matching runs locally in your browser and input is not stored.