Decodes a Base64 string back into raw data.
class Utilities method .base64Decode()
Utilities is the Apps Script service.
.base64Decode() is the method name you will see after a dot in your code.
What it does
Why it's used
- Read Base64 attachments or API fields back into raw data.
- Reverse encoding from external systems.
Common errors
- Forgetting parentheses on base64Decode. Write Utilities.base64Decode(), not Utilities.base64Decode or base64Decode by itself.
- Skipping dots between chained calls. Each step needs a dot, like Utilities.base64Decode().
- Adding spaces where they do not belong. Write Utilities.base64Decode(), not Utilities .base64Decode(), Utilities.base64Decode (), or Utilities . base64Decode().
- Wrong capitalization. Use Utilities and base64Decode, not utilities or base64decode.
Snippets using this method
Explore
Related methods
-
.base64Encode()
Encodes a string or bytes as Base64.
-
.computeDigest()
Returns a hash digest of a string or blob.
-
.newBlob()
Creates a blob object from text or binary data.
-
.jsonParse()
Parses a JSON string into a JavaScript object.
-
.jsonStringify()
Converts a JavaScript object into a JSON string.
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