Authorization headers
Quickly encode or inspect username:password pairs before sending them in HTTP Basic Authentication headers.
Encode or decode Base64 strings in a single click.
Result
Run the tool to see the result here
Overview
Base64 Studio keeps day-to-day encoding and decoding tasks close at hand so you can prepare Authorization headers, data URLs, or debug payloads without leaving the page.
Use Cases
Data URLs
Turn small images or SVG snippets into Base64 strings to embed directly into CSS or HTML.
Log inspection
Decode Base64 payloads captured from APIs, queues, or logs while debugging integrations.
How to Use
Choose encode or decode
Select whether you want to produce a Base64 string or convert one back to readable text.
Paste the payload
Drop in any text or Base64 data. The decoder validates the input and will surface helpful errors if the string is malformed.
Copy the result
Use the copy button to grab the converted value and move on to your next task.
Frequently Asked Questions
Why do I see "=" padding?
Padding characters make the output length a multiple of four, which is required by the Base64 specification. Some protocols omit padding, but standard decoders—including this one—handle it automatically.
Can I decode Base64URL tokens?
Yes. Characters "-" and "_" are converted to the standard "+" and "/" symbols before decoding so typical Base64URL payloads decode correctly.