Base64 Encoder/Decoder
Encode and decode Base64 strings online. Free Base64 converter for text, data, and binary. Instant results in browser — no installations, no uploads, 100% secure.
Frequently Asked Questions
What is Base64 encoding?
Base64 converts binary data into ASCII text using 64 printable characters. It's used for embedding images in HTML/CSS, sending binary data in JSON/XML, email attachments (MIME), and data URLs.
Does Base64 increase file size?
Yes — Base64 encoding increases size by approximately 33%. A 100KB file becomes ~133KB when Base64 encoded. This is the tradeoff for text-safe transport.
How to Use
Enter Text
Type or paste the text you want to encode into Base64.
Encode
Click Convert to generate the Base64-encoded output.
Copy
Copy the result to use in your code, API, or data URL.
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