---
title: "Converting string to/from Base64"
slug: "converting-string-tofrom-base64"
updated: 2023-01-06T15:50:01Z
published: 2023-01-06T15:50:00Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.catchpoint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Converting string to/from Base64

## Overview

The sub-macro `base64to()` converts a string to base64. This can be used within an `extract` macro as a third parameter, or within a `var` macro.

The sub-macro `base64from()` is used to decode a base64 string. This can be used with `extract` macro as well as with `var` macro.

## Examples

### **syntax: base64to()**

**Example**:

```
var val = 123456789;
var valToBase64 = ${var(val, base64to())};
var data = ${extract("resp-content", "regexp:<title>(.*)</title>", "base64to()")}
```

### **syntax: base64from()**

**Example**:

```
var val = 123456789;
var valToBase64 = ${var(val, base64to())};
var valFromBase64 = ${var(valToBase64, base64from())};
var data = ${extract("resp-content", "regexp:<title>(.*)\</title>", "base64from()")}
```

Below is a sample transaction, which encodes a string to base64 and then back.

```
// Step - 1
open("http://www.example.com/")
waitForNoRequest(5000)
var val = 123456789;
var valToBase64 = ${var(val, base64to())};
var valFromBase64 = ${var(valToBase64, base64from())};
typeKeys(//textarea[@id='paste_code'], "val=${var(val)},
valToBase64=${var(valToBase64)},
valFromBase64=${var(valFromBase64)}")
assert("${var(val, eq(${var(valFromBase64)}))}")
```
```