Base64 Encoder
Your data never leaves your browserEncode text to Base64, including full Unicode support.
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About Base64 Encoder
Convert any text string to its Base64 representation directly in your browser. This tool handles full Unicode text (emojis, accented characters, CJK scripts) by first UTF-8 encoding the input before applying Base64. Useful for encoding credentials, binary data payloads, or embedding data in URLs and HTML.
How to use
- Paste or type your text into the input panel.
- The Base64-encoded output appears instantly in the output panel.
- Click Copy to copy the result to your clipboard.
More Encoding / Decoding
Frequently Asked Questions
FAQs about Base64 Encoder
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters (A–Z, a–z, 0–9, +, /). It is commonly used to transmit binary data over text-only media such as email or JSON.
Why does this tool handle Unicode differently?
The native btoa() function only handles Latin-1 characters. This tool uses encodeURIComponent + unescape before btoa() to correctly encode any Unicode text, including emojis and non-Latin scripts.
Is my data sent to a server?
No. All encoding happens entirely in your browser using built-in JavaScript APIs. Nothing is transmitted.
What is Base64 used for?
Base64 is used to encode email attachments (MIME), embed images inline in CSS/HTML as data URIs, store binary data in JSON, and pass credentials in HTTP Basic Auth headers.
How do I decode Base64 back to text?
Use the companion Base64 Decoder tool to reverse the process and get your original text back.