---
title: "JSONPath Tester (RFC 9535) | JSON Lark"
description: "Test RFC 9535 JSONPath queries against your JSON: matches highlighted in the document, normalized paths, JSON Pointers, built-in examples."
url: https://jsonlark.me/jsonpath-tester/
---

Sheet 06 Query

# JSONPath tester

Run standard RFC 9535 JSONPath against your own JSON. Matches are highlighted in the document and listed with their normalized paths.

## How to use it

Type a query, or pick one from Examples to run it against the RFC's bookstore document. The result updates as you type: Document highlights each match, Values lists what matched, and Paths gives each node's normalized path and JSON Pointer.

### Syntax at a glance

| Syntax | Selects |
| --- | --- |
| `$` / `@` | The root / the current node inside a filter |
| `.name` `['a b']` | An object member; quote names with spaces or dots |
| `[0]` `[-1]` | An array element, negative from the end |
| `[1:5:2]` | A slice: start, end, step |
| `*` `..` | Every child / at any depth |
| `[a, b]` | Several selectors, duplicates kept |
| `[?@.price < 10]` | A filter: comparisons, `&&` `\|\|` `!`, or just `[?@.isbn]` to test existence |
| `length()` `count()` | Size of a value / number of nodes |
| `match()` `search()` `value()` | Whole or partial I-Regexp match / a single node's value |

### RFC 9535 versus older JSONPath

The RFC (2024) standardised the syntax Stefan Goessner sketched in 2007, and many older libraries differ from it. Script expressions such as `[(@.length-1)]` and operators such as `=~` or `in` are gone; regular expressions go through `match()` and `search()`. Comparisons never convert types, so `1 == '1'` is false. Filter parentheses are optional, and every query starts with `$`. This tester runs in standard-only mode, so a query that works here works in any compliant implementation.

**Testing sign-up emails?** [CleanTempMail's Temp Mail API](https://cleantempmail.com/api) returns a test inbox's messages as JSON, so a query like `$..[?search(@, 'verify')]` can pull out the verification link. It is paid once per request quota, with no subscription.

## Questions

**What is a normalized path?**

The single canonical path RFC 9535 gives each node, with quoted names and plain indexes, like $['store']['book'][0]. The Paths view also shows it as a JSON Pointer, ready for a JSON Patch.

**Which library runs the queries?**

json-p3 (MIT licence), which is tested against the JSONPath Compliance Test Suite, in its strict mode with no extensions. It is loaded from this site and runs in your browser.

**Is my document uploaded?**

No. Queries run in this tab and nothing you paste leaves it. Page views are counted with Cloudflare Web Analytics, which sets no cookies and never sees your data.