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decode base64 api token

Decode a Base64 API token payload for inspection

Quickly inspect encoded token content so you can verify whether the upstream system sent the expected data.

Some APIs return opaque-looking Base64 strings that are really just transport-encoded text or JSON. Decoding them safely can show whether the issue is content, signing, or transport.

Open the tool Expected result

How to use it

Step 1

Confirm the token is plain Base64

Check whether the value is a raw Base64 payload instead of a signed token format like JWT.

Step 2

Decode and inspect the text

Review the output for expected keys, scopes, or embedded JSON.

Step 3

Redact before sharing

Remove any secrets, account IDs, or live authorization data.

Sample input

eyJ0eXBlIjoidGVzdCIsInNjb3BlIjoicmVhZDphbGwifQ==

Expected result

You can tell whether the payload itself is wrong or whether the bug lives elsewhere in the auth flow.

Common mistakes

Confusing Base64 with encryption.
Pasting a URL-safe variant without checking character substitutions.
Sharing decoded secrets in tickets.

Related workflows

Encode a small image or SVG snippet into Base64

Guide

Debug URL-safe Base64 strings with missing padding

Guide

Related tools

Decode JSON Web Tokens

ToolsDashboard

decode base64 api token

Decode a Base64 API token payload for inspection

Quickly inspect encoded token content so you can verify whether the upstream system sent the expected data.

Some APIs return opaque-looking Base64 strings that are really just transport-encoded text or JSON. Decoding them safely can show whether the issue is content, signing, or transport.

Open the tool Expected result

How to use it

Step 1

Confirm the token is plain Base64

Check whether the value is a raw Base64 payload instead of a signed token format like JWT.

Step 2

Decode and inspect the text

Review the output for expected keys, scopes, or embedded JSON.

Step 3

Redact before sharing

Remove any secrets, account IDs, or live authorization data.

Sample input

eyJ0eXBlIjoidGVzdCIsInNjb3BlIjoicmVhZDphbGwifQ==

Expected result

You can tell whether the payload itself is wrong or whether the bug lives elsewhere in the auth flow.

Common mistakes

Confusing Base64 with encryption.
Pasting a URL-safe variant without checking character substitutions.
Sharing decoded secrets in tickets.

Related workflows

Encode a small image or SVG snippet into Base64

Guide

Debug URL-safe Base64 strings with missing padding

Guide

Related tools

Decode JSON Web Tokens