Free Base64 Encoder & Decoder – Online, Private
Encode text or files to Base64 and decode Base64 strings back to their original form — all in your browser. Supports UTF-8 text, binary files, and data URLs. 100% private — nothing is uploaded or stored.
Drag & drop a file here
or click to select a file
Input: 0 B Output: 0 B Ratio: --
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Frequently Asked Questions
Base64 converts binary data into ASCII text using 64 printable characters (A-Z, a-z, 0-9, +, /). It's commonly used to embed images in HTML/CSS, transmit binary data in JSON/XML, and encode email attachments.
No — Base64 is encoding, not encryption. It's fully reversible and provides no security. Anyone can decode it.
Yes — drag & drop or select a file to encode it as a Base64 string or data URL.
Yes — all encoding and decoding happens in your browser. Nothing is sent to any server.