terraform/website/docs/configuration/functions/jsonencode.html.md

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---
layout: "functions"
page_title: "jsonencode function"
sidebar_current: "docs-funcs-encoding-jsonencode"
description: |-
The jsonencode function encodes a given value as a JSON string.
---
# `jsonencode` Function
`jsonencode` encodes a given value to a string using JSON syntax.
The JSON encoding is defined in [RFC 7159](https://tools.ietf.org/html/rfc7159).
This fucntion maps
[Terraform language values](./expressions.html#types-and-values)
to JSON values in the following way:
| Terraform type | JSON type |
| -------------- | --------- |
| `string` | String |
| `number` | Number |
| `bool` | Bool |
| `list(...)` | Array |
| `set(...)` | Array |
| `tuple(...)` | Array |
| `map(...)` | Object |
| `object(...)` | Object |
| Null value | `null` |
Since the JSON format cannot fully represent all of the Terraform language
types, passing the `jsonencode` result to `jsondecode` will not produce an
identical value, but the automatic type conversion rules mean that this is
rarely a problem in practice.
## Examples
```
> jsonencode({"hello"="world"})
{"hello":"world"}
```
## Related Functions
* [`jsondecode`](./jsondecode.html) performs the opposite operation, _decoding_
a JSON string to obtain its represented value.