# parseJsonKeys

Description: parseJsonKeys cheatcode documentation

Note: This document was authored using MDX

  Source: https://github.com/NomicFoundation/hardhat-website/tree/main/src/content/docs/docs/reference/cheatcodes/External/parse-json-keys.mdx

{/* This document contains content copied/adapted from the Foundry Book (MIT licensed). See LICENSE in the parent directory. */}

### Signature

```solidity
// Get list of keys present in a JSON string
function parseJsonKeys(
  string calldata json,
  string calldata key
) external pure returns (string[] memory keys);
```

### Description

Gets list of keys present in a JSON string

### Examples

```solidity
string memory json = '{"key": {"a": 1, "b": 2}}';
string[] memory keys = vm.parseJsonKeys(json, ".key"); // ["a", "b"]
```

```solidity
string memory json = '{"key": "something"}';
string[] memory keys = vm.parseJsonKeys(json, "$"); // ["key"]
```

```solidity
string memory json = '{"root_key": [{"a": 1, "b": 2}]}';
string[] memory keys = vm.parseJsonKeys(json, ".root_key[0]"); // ["a", "b"]
```