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Base64 Encoder Online Free (Encode & Decode)

Encode text, images, or binary data into Base64 strings, or decode Base64 back to plain text online for free. 100% client-side.

4.8 / 5(1670 votes)
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Execution Mode
100% Client-Side In-Browser
Data Privacy
Zero Persistent Storage
Access Policy
Free · No Signup Required
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How to Use Base64 Encoder Online Free (Encode & Decode)

  1. 1

    Select 'Encode' or 'Decode' mode.

  2. 2

    Enter input text or upload a file.

  3. 3

    Copy the result or data URI immediately.

Key Features

  • UTF-8 character support
  • Encode / Decode mode toggle
  • Image & file to Base64 data URI conversion
  • 100% in-browser client-side execution

Benefits

  • Safely transmit binary data across text-only networks
  • Embed small images and SVGs directly in HTML and CSS code
  • Zero data sent to external servers

Common Pitfalls to Avoid

  • • Confusing Base64 encoding with encryption — anyone can easily decode Base64 strings.

Data Handling & Privacy Notice

This utility executes entirely client-side in your web browser. No text, calculations, or uploaded data are sent to our servers or stored in any database.

Frequently Asked Questions

Base64 takes binary data and translates it into an ASCII string representation using a 64-character alphabet. Every 3 bytes (24 bits) of data are split into four 6-bit chunks.

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