---
title: "k6/encoding | Grafana k6 documentation"
description: "The encoding module provides base64 encoding/decoding as defined by RFC4648."
---

# k6/encoding

The [`k6/encoding` module](/docs/k6/latest/javascript-api/k6-encoding/) provides [base64](https://en.wikipedia.org/wiki/Base64) encoding/decoding as defined by [RFC4648](https://tools.ietf.org/html/rfc4648).

Expand table

| Function                                                                                            | Description             |
|-----------------------------------------------------------------------------------------------------|-------------------------|
| [b64decode(input, \[encoding\], \[format\])](/docs/k6/latest/javascript-api/k6-encoding/b64decode/) | Base64 decode a string. |
| [b64encode(input, \[encoding\])](/docs/k6/latest/javascript-api/k6-encoding/b64encode/)             | Base64 encode a string. |