Base64 Encoder/Decoder Online Free

Base64 Encoder/Decoder

Encode and decode text, files, images to and from Base64. Auto-detect mode.

100% private - everything runs in your browser, no data is sent anywhere

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What is Base64 Encoding and When Do You Need It?

Base64 is an encoding scheme that converts binary data (like images, files, or binary strings) into ASCII text format. It uses 64 characters (A-Z, a-z, 0-9, +, /) to represent any binary data, making it safe to transmit over text-based protocols like email, HTTP headers, or JSON APIs.

Base64 is an encoding, not encryption - it does not provide any security. Anyone can decode Base64 data back to its original form instantly. Never use Base64 as a security measure. Our tool processes data entirely in your browser - nothing is sent to any server.

Common Base64 Use Cases for Developers

  • Embedding images in HTML/CSS as data URIs
  • API authentication - Basic Auth headers
  • JWT (JSON Web Token) payload encoding
  • Email MIME attachments encoding
  • Storing binary data in databases as text
  • Canvas image data export

Frequently Asked Questions

What is Base64 encoding?+
Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string format. It is commonly used for embedding images in HTML/CSS and transmitting data in APIs.
Can I encode and decode with this tool?+
Yes. You can both encode text/files to Base64 and decode Base64 strings back to their original form.
Is Base64 the same as encryption?+
No. Base64 is an encoding scheme, not encryption. It does not provide any security. Anyone can decode a Base64 string.