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website/docs/language/functions/textdecodebase64.mdx

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+---
+page_title: textdecodebase64 - Functions - Configuration Language
+description: >-
+  The textdecodebase64 function decodes a string that was previously
+  Base64-encoded,
+
+  and then interprets the result as characters in a specified character
+  encoding.
+sidebar_title: textdecodebase64
+---
+
+# `textdecodebase64` Function
+
+-> **Note:** This function is supported only in Terraform v0.14 and later.
+
+`textdecodebase64` function decodes a string that was previously Base64-encoded,
+and then interprets the result as characters in a specified character encoding.
+
+Terraform uses the "standard" Base64 alphabet as defined in
+[RFC 4648 section 4](https://tools.ietf.org/html/rfc4648#section-4).
+
+The `encoding_name` argument must contain one of the encoding names or aliases
+recorded in
+[the IANA character encoding registry](https://www.iana.org/assignments/character-sets/character-sets.xhtml).
+Terraform supports only a subset of the registered encodings, and the encoding
+support may vary between Terraform versions.
+
+Terraform accepts the encoding name `UTF-8`, which will produce the same result
+as [`base64decode`](/language/functions/base64decode).
+
+## Examples
+
+```
+> textdecodebase64("SABlAGwAbABvACAAVwBvAHIAbABkAA==", "UTF-16LE")
+Hello World
+```
+
+## Related Functions
+
+* [`textencodebase64`](/language/functions/textencodebase64) performs the opposite operation,
+  applying target encoding and then Base64 to a string.
+* [`base64decode`](/language/functions/base64decode) is effectively a shorthand for
+  `textdecodebase64` where the character encoding is fixed as `UTF-8`.