How do I decode a Base64 string?

Paste the Base64 string into the input box above to reveal the decoded text immediately.

What if my Base64 string uses URL-safe characters?

It automatically normalizes - and _ characters before decoding.

100% Client-Side • Zero Data Leaves Browser

Decode Base64 strings back into readable UTF-8 text or JSON instantly in your browser.

Active Converter / Utility

Input Data Upload File

Output Result