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Formula - base64decode

Easily decode base64-encoded data using the Nodinite base64decode Formula plugin. This page shows how to decode base64 strings from message Content, Context, or the output of other formulas.

Designed for business users and integrators — no developer required; you can even use AI to craft expressions.

  • Decode base64 data from any Payload or Context in any Log Event
  • Support for character encodings like UTF-8, ISO-8859-1, and more
  • Transform and surface meaningful data in Nodinite Log Views, search filters, and self-service diagnostics
  • Combine with other Formula functions for powerful, layered expressions

What does the base64decode Formula do?

The base64decode(Content) or base64decode(Content, 'Encoding') Formula function decodes a base64-encoded string back to its original format. Use it on message bodies, context values, or the results from other Formula functions to decode data in your views.

How it works: Input ➜ base64decode ➜ Result

graph LR A["Input: Base64-encoded string"] --> B["base64decode(Content, 'Encoding')"] B --> C["Result: Decoded text"]

Flow: The base64-encoded content is decoded to its original text format, optionally using a specified character encoding.

Syntax

Decode from message body (default UTF-8): (See Example 1)

base64decode(body)

Decode with specific encoding (ISO-8859-1): (See Example 2)

base64decode(body, 'iso-8859-1')

Decode with UTF-8 encoding: (See Example 3)

base64decode(body, 'UTF-8')

Decode from message context: (See Example 4)

base64decode(context('MessageContextKey'))

Decode from nested formula: (See Example 5)

base64decode(jsonpath('$.path', body))

Supported encodings: UTF-8, ISO-8859-1, ASCII, UTF-16, and more.

Examples

Example 1: Decode base64 from message body

Input

Message body is Tm9kaW5pdGU=

Formula Expression 

base64decode(body)

Result

Nodinite

Example 1

Example 2: Decode base64 with ISO-8859-1 encoding

Input

Message body is U2tlbGxlZnRl5Q==

Formula Expression 

base64decode(body, 'iso-8859-1')

Result

Skellefteå

Example 2

Example 3: Decode base64 with UTF-8 encoding

Input

Message body is U2tlbGxlZnRlw6U=

Formula Expression 

base64decode(body, 'UTF-8')

Result

Skellefteå

Example 3

Example 4: Decode base64 from context value

Input

Message context contains a property id with value bm9kaW5pdGU=

Formula Expression 

base64decode(context('id'))

Result

nodinite

Example 4

Example 5: Decode base64 from nested formula result

Input

Message body is:

[ { "name": "YXdlc29tZQ==" }, { "name": "ZnVuY3Rpb24=" } ]

Formula Expression 

base64decode(jsonpath('$..name',body))

Result

awesome, function

Example 5

Features

Important

The base64decode Formula converts base64-encoded strings back to their original text or binary format, making it easier to view and analyze encoded data in Nodinite. You can optionally specify a character encoding (e.g., UTF-8, ISO-8859-1) when decoding the string.

  • Flexible Inputs: Decode from message body, Context, or the result of another Formula
  • Encoding Support: Optionally specify encoding (e.g., UTF-8, ISO-8859-1) to handle different character sets (see List of encodings)
  • Composable: Combine with other Formula functions like jsonPath or xPath for advanced transformations
  • Self-Service: Let business users decode and analyze base64 content without developer intervention
  • Performance Note: This function loads the entire message into RAM—use on small messages only

How to use

To use the base64decode Formula in a Search Field Expression:

  1. Open your Nodinite Web Client
  2. Navigate to Administration → Search Fields
  3. Create or edit a Search Field
  4. Choose Formula as the expression type
  5. See Syntax section above for common patterns and usage examples

Next step