100% Free · No Signup · Private (runs in your browser)

Free Base64 Encoder / Decoder

Encode text or files to Base64 and decode Base64 back to readable text. Full UTF-8 support, drag-and-drop file encoding, and one-click copy — all in your browser.

Mode: Text → Base64
Your Base64 result will appear here. Click Encode to get started.

Drop a file here or click to browse — the file will be encoded to Base64

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Base64 FAQ

Answers to the most common questions about Base64 encoding and decoding.

Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string using 64 characters (A–Z, a–z, 0–9, +, /). It is commonly used to embed images in HTML/CSS, transmit binary data over text-based protocols like JSON and XML, and encode email attachments (MIME).
No. Base64 is an encoding, not encryption. Anyone can decode it instantly. Never use Base64 to protect sensitive data — use proper encryption (AES, RSA) instead. Base64 only obscures data from casual reading.
Yes. The tool uses UTF-8-safe encoding, so text containing emoji, CJK characters, and other non-ASCII characters is encoded and decoded correctly without mojibake.
Yes. Drag and drop or browse any file and it will be read locally and converted to a Base64 data URL. This is great for embedding small images directly into HTML or CSS as data: URIs.
Base64 expands data by roughly 33% because every 3 bytes of input become 4 ASCII characters. This overhead is normal and is the trade-off for being able to represent binary data as safe text.
No. All encoding and decoding happens entirely in your browser using the native btoa/atob and FileReader APIs. Your text and files never leave your device.
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