JSON Formatter
Format, validate, and prettify JSON in your browser. Paste messy API responses and get clean structured output.
Open toolTest regular expressions against sample text with live match feedback while iterating patterns quickly.
{
"status": "ready",
"output": "clean"
}
Paste the payload, pattern, or source value.
Set the operation and any relevant options.
Inspect, copy, or download the output.

Practical guide
Build regex patterns from real examples, inspect matches, and avoid destructive replacements.
Read the guideNext useful move
Format, validate, and prettify JSON in your browser. Paste messy API responses and get clean structured output.
Open toolGenerate MD5, SHA-256, or SHA-512 hashes from input text for checksums and integrity checks.
Open toolGenerate random UUID v4 identifiers in single or bulk mode for databases and API identifiers.
Open toolI used Regex Tester to finish a task that would normally take me much longer, and the result was clean on the first try.
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