Result

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.

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.

Use Cases

Authorization headers

Quickly encode or inspect username:password pairs before sending them in HTTP Basic Authentication headers.

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.

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.

Concept Notes

Encoding, not secrecy

Base64 is a reversible binary-to-text encoding that inflates size by roughly one third; it is ideal for embedding small binaries in JSON or HTML but offers zero confidentiality. The URL-safe variant swaps “+/” for “-_” and may drop “=” padding, so robust decoders normalise those characters before processing tokens from webhooks, JWTs, or data URIs.