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Base64 Encoder Online Free

Encode text or files to Base64 format online for free. Instant encoding in your browser, no data sent to any server.

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🔒 No upload · 100% local processing · No account required

Base64 Encoder Online

Encode text strings or file content to Base64 format instantly in your browser. Base64 encoding is widely used in web development to embed binary data in HTML, CSS, JSON, or URLs.

How to encode to Base64

  1. Paste text or upload a file.
  2. The tool converts input to Base64 representation.
  3. Click Encode to generate the string.
  4. Copy the encoded output.

Frequently asked questions

What is Base64 used for?
Embedding images in HTML, transmitting binary in JSON APIs, and encoding email attachments.
Does Base64 compress?
No. It increases size by about 33 percent.
Is Base64 encryption?
No. It is an encoding scheme, easily reversible.
Can I encode images?
Yes. Upload an image and get a Base64 data URL for embedding.