About this tool
Debug standard JSONPath expressions against bounded API responses, fixtures, logs, and configuration samples before using them in tests or automation.
JSONPath Tester helps developers query nested JSON samples without writing temporary scripts. It is useful for API responses, webhook payloads, logs, fixtures, monitoring checks, and documentation examples where one field or repeated array value needs to be found quickly.
- Uses jsonpath-rfc9535 1.3.0 for child and descendant segments, wildcards, indexes, slices, and standard filter selectors.
- Pairs every typed value with its normalized RFC 9535 path and supports local filtering, copying, and JSON evidence export.
- Rejects unsafe integers and enforces explicit input, structure, expression, and result limits before displaying evidence.
How to use JSONPath
Paste a valid JSON sample, enter a JSONPath expression, and review each matching path and value. Start with a broad wildcard expression when exploring a payload, then narrow the path before copying it into tests, monitors, data extraction scripts, or docs.
When this tool is useful
- When locating nested values in API responses, webhook samples, logs, or fixture files.
- Before copying a JSONPath expression into a test, monitor, transformation script, or documentation snippet.
- When validating whether array wildcard expressions return the expected set of IDs, slugs, prices, or statuses.
Practical tips
- Use representative API samples so paths are tested against realistic nesting and optional fields.
- Narrow wildcard expressions before using them in automated checks to avoid unexpected extra matches.
- Pair this with JSON Formatter when the sample is minified or difficult to read.
Examples you can test
Load an example, compare the result with the expected output, then replace it with your own input.
Extract IDs from an API response
Example input
$.data.items[*].id
Expected output
Matched item ID values with their full JSON paths
Wildcard segments are useful when the same field appears inside every object in an array.
Check a nested status field
Example input
$.data.tools[0].popular
Expected output
Boolean value at the selected array item path
Index lookups help validate one specific item before broadening the expression.
Validation checklist
- Confirm the JSON sample parses before testing the path.
- Check both the matched value and the matched path before copying the expression.
- Avoid relying on wildcard output until you know how many values it returns.
- Document unsupported filters or script expressions if the destination system expects a broader JSONPath dialect.