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Base64 Encoder/Decoder – Encode and decode text to/from Base64 format

Encode and decode text to/from Base64 format

How to Use This Tool

Paste text to encode to Base64, or paste Base64 to decode back to readable text, then copy the result.

When Should You Use This Tool?

Use this when you need to safely move small text data through systems that don’t like special characters (not for security).

See also: Unit Converter, Coin Flip .

What is Base64 Encoding/Decoding?

Base64 is an encoding scheme that converts binary data into ASCII text format. It's commonly used to encode data for transmission over media that are designed to deal with textual data, such as email attachments, data URLs, and API responses. This tool allows you to easily encode text to Base64 or decode Base64 back to readable text.

When to Use This Tool

Base64 encoding is useful in many scenarios:

  • Web Development: Encode images or data for data URLs
  • API Integration: Encode credentials or data for HTTP requests
  • Email: Encode attachments or special characters
  • Data Storage: Store binary data in text-based formats
  • Debugging: Decode Base64 strings to understand encoded data

How Base64 Works

Base64 uses 64 characters (A-Z, a-z, 0-9, +, /) to represent binary data. Every 3 bytes of input become 4 characters of output, making the encoded data about 33% larger than the original. Padding with '=' characters ensures the output length is always a multiple of 4.

Quick Guide

  1. Select whether to encode or decode
  2. Enter your text (for encoding) or Base64 string (for decoding)
  3. Click "Process" to convert
  4. Use "Copy Result" to copy the output

Frequently Asked Questions

Is Base64 encryption?
No, Base64 is encoding, not encryption. It's easily reversible and provides no security. Anyone can decode Base64 data. For security, use proper encryption methods.
Can I encode binary files?
This tool works with text. For binary files, you'd need to first convert them to Base64 using specialized tools, then you can decode the text here.
Why is the encoded output longer?
Base64 encoding increases size by approximately 33% because it converts 3-byte groups into 4-character groups, and uses only 64 characters instead of 256 possible byte values.
What if decoding fails?
Invalid Base64 strings will cause errors. Ensure your input is valid Base64 (only contains A-Z, a-z, 0-9, +, /, and = for padding).
Can I encode special characters or emojis?
Yes, the tool handles Unicode characters including emojis by first converting them to UTF-8, then encoding to Base64. Decoding properly restores the original characters.

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