Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings back to text. All processing happens in your browser - your data never leaves your device.

Privacy Notice: All encoding and decoding happens in your browser. Your data is never sent to any server.

How to Use the Base64 Encoder/Decoder

Encoding Text to Base64

  1. Click the "Encode" tab
  2. Enter or paste your text into the input field
  3. Click "Encode to Base64"
  4. Copy the resulting Base64 string

Decoding Base64 to Text

  1. Click the "Decode" tab
  2. Paste your Base64 string
  3. Click "Decode from Base64"
  4. View the decoded text result

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string format. It's commonly used to encode data that needs to be stored or transferred over media designed to handle text. Base64 encoding is frequently used in email attachments, data URLs, and encoding authentication credentials.

Common Use Cases

For Developers

  • Encoding credentials for HTTP Basic Authentication
  • Creating data URIs for images and files
  • Embedding binary data in JSON or XML
  • Debugging API responses

For System Administrators

  • Encoding configuration files
  • Storing secrets in environment variables
  • Reading Kubernetes secrets
  • Encoding SSH keys for transmission

Features

  • 100% Client-Side - All encoding and decoding happens in your browser using JavaScript
  • UTF-8 Support - Properly handles international characters and emojis
  • Instant Results - No waiting, no uploads, no server processing
  • Privacy First - Your data never leaves your browser
  • No Limits - Encode or decode strings of any length
  • Copy to Clipboard - One-click copy of results

Frequently Asked Questions

Is my data safe?

Yes! All encoding and decoding happens entirely in your browser using JavaScript. Your data never leaves your device and is never sent to any server. We don't log, store, or transmit any data.

What is the difference between Base64 and encryption?

Base64 is NOT encryption - it's an encoding scheme. Anyone can decode Base64 strings without a key. Base64 is meant for data representation, not security. Never use Base64 alone to protect sensitive information.

Can I encode files?

Currently, this tool encodes and decodes text strings. For file encoding, you would need to first convert the file to a string format. We may add file upload support in the future.

Why do I see "=" at the end of Base64 strings?

The "=" characters are padding added to make the encoded string length a multiple of 4. This is required by the Base64 specification and ensures proper decoding.

Does this work offline?

Yes! Once you've loaded this page, the tool works completely offline. All the code runs in your browser, so no internet connection is needed for encoding or decoding.