What is Base64 encoding?

Base64 is an encoding method that uses 64 printable characters (A-Z, a-z, 0-9, +, /) to represent binary data. Commonly used for transmitting binary data in text protocols, such as email attachments and image data in JSON.

Does Base64 encoding increase data size?

Yes, Base64 encoded data is approximately 33% larger than the original. Because every 3 bytes (24 bits) are encoded into 4 Base64 characters.

Is this tool free to use?

Yes, completely free. No registration required. All processing done locally in browser.

Base64 Encoder / Decoder

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Input Text

Or Upload File

Drag and drop a file here or click to select

Max 10MB

Result

Output:

About Base64 Encoder / Decoder

Free online Base64 Encoder / Decoder that supports Base64 encoding and decoding for both text and files. You can encode text or file content into a Base64 string, or decode a Base64 string back to its original form. All processing happens locally in your browser — nothing is uploaded to any server.

What is Base64 Encoder / Decoder?

Base64 Encoder / Decoder is a free online tool that runs entirely in your browser. No download or signup needed — enter Output and other values to get results instantly. All data is processed locally.

Use Cases

Process data formats quickly during development and debugging
Verify encoding/decoding results when troubleshooting API issues
Understand data transformation principles while learning programming
Switch between devices without installing local tools

Key Features

Completely Free: No registration, no limits
Privacy Safe: Data never leaves your browser
Cross-Platform: Any modern browser
Zero Dependencies: Open and use