What is Base64 encoding?

Base64 encoding converts binary data into ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's commonly used to transmit data over text-based protocols like HTTP and email.

Why use Base64 encoding?

Base64 encoding allows you to safely transmit binary data through text-only channels, embed images in HTML/CSS, store binary data in JSON, and encode credentials for HTTP authentication.

Is Base64 encoding secure?

Base64 is NOT encryption - it's encoding. Anyone can decode Base64 text. Use Base64 for data transport, not security. For security, use encryption algorithms like AES.

Does Base64 increase file size?

Yes, Base64 encoding increases data size by approximately 33%. Every 3 bytes of input become 4 characters of Base64 output, plus padding characters.

Base64 Encoder

Convert any text to Base64 encoding instantly. Perfect for encoding data for URLs, APIs, and data storage.

Text Input

Base64 Output

Instant text to Base64 conversion

Full Unicode and emoji support

Copy result with one click

100% client-side processing

Related Base64 Tools

Base64 Decoder

Decode any Base64 string back to original text instantly. Perfect for debugging APIs and decoding encoded data.

URL-Safe Decoder

Decode URL-safe Base64 strings back to original text. Handles - and _ characters and missing padding automatically.

URL-Safe Encoder

Encode text to URL-safe Base64 format. Replaces + with - and / with _ for safe use in URLs and filenames.

Base64 to Image

Convert Base64 strings back to viewable images. Decode data URIs and download as PNG, JPG, or other formats.

How to Use the Base64 Encoder

Our base64 encoder makes Base64 encoding and decoding simple:

1.Enter your text in the input area on the left
2.Click "Encode" to convert your text to Base64
3.Copy the result with one click to use anywhere
4.Use "Swap" to quickly decode the result back

Common Use Cases

•Encoding data for REST APIs
•Creating data URIs for images
•Storing binary data in JSON
•Email attachment encoding

Why Use Our Base64 Encoder?

•100% Private: All processing happens in your browser
•No Registration: Use immediately without creating an account
•No Limits: Process as much data as you need
•Works Offline: Once loaded, works without internet
•Unicode Support: Full emoji and international character support

Technical Details

Base64 encoding uses a 64-character alphabet to represent binary data as ASCII text. Every 3 bytes of input become 4 characters of output (~33% size increase).

Our tool uses the browser's native btoa() and atob() functions for fast, reliable conversion. Unicode text is first converted to UTF-8.