How do I decode a JWT token payload?

A JWT has three Base64URL-encoded sections separated by dots. Copy the middle section (payload) and paste it into this decoder to see the claims as JSON.

What is the difference between Base64 and Base64URL?

Base64URL is a variant that uses - instead of + and _ instead of / so the encoded string is safe to use in URLs. This decoder handles both variants automatically.

What if the decoded output shows garbage characters?

If the original data was binary (like an image or file) rather than text, the decoded output will show unreadable characters. This tool is for text data; binary Base64 requires a different approach.

Base64 to Text Decoder

Decodes a Base64-encoded string back to plain text. Handles both standard Base64 (using + and /) and URL-safe Base64 (using - and _). Correctly decodes UTF-8 encoded content including non-ASCII characters.

Base64 Input

Decode JWT payloads, HTTP Basic Auth credentials, or any Base64-encoded data back to readable text instantly.

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