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Base64 Encode / Decode— Free & Private

Encode or decode Base64 strings directly in your browser.

Processed in your browser. Nothing uploaded.

What Is Base64 Encoding?

Base64 encoding and decoding converts data between its original form and a string of ASCII characters using a 64-character alphabet. Encoding is commonly used to embed images in HTML or CSS, transmit binary data through text-based protocols like email or JSON APIs, and encode authentication credentials, while decoding reverses the process to recover the original data. Our tool handles both directions in your browser with no data sent to any server.

How to Use Base64 Encode / Decode

  1. Choose mode

    Select whether you want to encode text to Base64 or decode a Base64 string.

  2. Enter your input

    Paste the text to encode or the Base64 string to decode into the input area.

  3. View and copy result

    See the encoded or decoded result instantly and copy it to your clipboard.

Why Use Our Base64 Encoder/Decoder?

Encode and decode in one tool with a simple toggle
Processes everything in the browser — no data transmitted
Handles text and file input for encoding
Supports UTF-8, ASCII, and binary data
One-click copy of the result to clipboard
Real-time conversion as you type
Detects and warns about invalid Base64 input

Frequently Asked Questions

Is Base64 encoding the same as encryption?

No. Base64 is an encoding scheme, not encryption. Anyone can decode a Base64 string. It is designed for data transport, not security. Do not use it to protect sensitive information.

Why does Base64 make the data larger?

Base64 represents every 3 bytes of input as 4 ASCII characters, resulting in approximately 33% size overhead. This trade-off enables binary data to travel safely through text-only channels.

Can I encode files like images to Base64?

Yes. You can upload a file and the tool will produce the Base64-encoded string, which you can then embed in HTML, CSS, or include in API payloads.