Free Base64 Encode Online
Encode any text to Base64 instantly. Supports Unicode. Free, no signup, browser-based.
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How to Convert Text to Base64 Online
Paste your text into the input field and the Base64-encoded output appears instantly. This encoder properly handles Unicode characters, emojis, and special characters by first converting to UTF-8 bytes before encoding.
Why Use Base64 Encode Online?
Base64 encoding is essential for embedding binary data in text formats — from data URIs in HTML/CSS to encoding email attachments. Developers use it daily for API payloads, JWT tokens, and configuration files that require ASCII-safe data.
Frequently Asked Questions
What is Base64? Base64 is an encoding that represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, +, /). It is not encryption — anyone can decode it.
Why does Base64 make data ~33% larger? Base64 represents 3 bytes of input as 4 characters of output, plus padding. This 4/3 ratio means a 33% size increase.