Base64 is an encoding scheme that converts binary data to ASCII text, commonly used in data URIs and email.

Can I decode broken Base64?

The decoder requires valid Base64 padding. It will show an error if the input is malformed.

Is Base64 the same as encryption?

No. Base64 is an encoding that makes binary data safe for text-based channels - anyone can decode it. Use it for transport and embedding, never as a way to protect secrets.

Why does decoded output sometimes look garbled?

That usually means the original data was binary, like an image or a file, rather than plain text. Base64 encodes raw bytes, so only decode content you expect to be text or JSON.

BASE64 Encoder/Decoder — Free & Private in Your Browser

Base64 Encoder/Decoder runs entirely in your browser. Enable JavaScript to use the interactive tool — your files are processed locally and never uploaded.

What is Base64 Encoder/Decoder?

Base64 Encoder/Decoder is a developer tool that translates text or binary data into Base64 format and vice versa. Base64 is an encoding scheme used to represent binary data in an ASCII string format, commonly used for embedding images in CSS, sending email attachments, and storing complex data in cookies.

How to Use Base64 Encoder/Decoder

Select whether you want to Encode or Decode
Paste your text or Base64 string into the input box
The tool will instantly process the conversion
Copy the result to your clipboard

Why Use Our Base64 Encoder/Decoder?

Instantly encode standard text into Base64 strings
Decode Base64 strings back into readable text
Process data entirely locally for complete security
Essential for debugging web applications and APIs

Common Use Cases

Encoding credentials for Basic HTTP Authentication headers
Decoding a Base64-encoded JSON payload from an API response
Translating binary file data for transmission over text-based protocols
Embedding a small image as a data URI inside HTML or CSS

Worked Example

Type hello:world into the encoder and you get aGVsbG86d29ybGQ=. That string slots straight into an HTTP Basic Authentication header - Authorization: Basic aGVsbG86d29ybGQ= - so you can authenticate against an API without sending the raw username and password. To inspect a JWT or an API payload, switch to Decode and paste the Base64 middle segment of the token; the tool converts it straight back to readable text such as {"sub":"1234","role":"admin"}.

Frequently Asked Questions

Base64 is an encoding scheme that converts binary data to ASCII text, commonly used in data URIs and email.
The decoder requires valid Base64 padding. It will show an error if the input is malformed.
No. Base64 is an encoding that makes binary data safe for text-based channels - anyone can decode it. Use it for transport and embedding, never as a way to protect secrets.
That usually means the original data was binary, like an image or a file, rather than plain text. Base64 encodes raw bytes, so only decode content you expect to be text or JSON.

🔡 Base64 Encoder/Decoder