Base64 Encoder/Decoder

Encode and decode Base64 strings

Key Facts

Category
Conversion & Encoding
Input Types
textarea, select
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The Base64 Encoder/Decoder is a lightweight utility designed to quickly convert plain text into Base64 format or revert Base64 strings back into readable text.

When to Use

  • •When you need to safely transmit binary data or special characters over text-based protocols.
  • •When you are debugging or inspecting encoded data strings found in web requests or configuration files.
  • •When you need to embed small assets like images or icons directly into HTML or CSS code.

How It Works

  • •Paste your text or Base64 string into the input area.
  • •Select the desired operation: 'Encode' to convert text to Base64, or 'Decode' to convert Base64 back to text.
  • •The tool instantly processes the input and displays the result in the output field.

Use Cases

Encoding configuration strings for web applications.
Decoding data payloads from API responses.
Preparing text data for inclusion in data URIs.

Examples

1. Encoding API Credentials

Web Developer
Background
A developer needs to include basic authentication credentials in an HTTP header.
Problem
The username and password must be Base64 encoded to meet the Basic Auth standard.
How to Use
Enter 'username:password' into the input field and select 'Encode'.
Outcome
The tool generates the Base64 string required for the 'Authorization' header.

2. Decoding Encoded Payloads

Security Analyst
Background
An analyst is reviewing network traffic and encounters a suspicious Base64-encoded string.
Problem
The string is unreadable and needs to be decoded to identify the underlying message.
How to Use
Paste the encoded string into the input field and select 'Decode'.
Outcome
The tool reveals the original plain text, allowing the analyst to inspect the content.

Try with Samples

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FAQ

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format.

Is my data sent to a server?

No, this tool performs all encoding and decoding operations locally in your browser for your privacy.

Can I encode images with this tool?

This tool is designed for text-based input. For images, you must first convert the file to a Base64 string before pasting it here.

Why does my decoded output look like garbled text?

This usually happens if the input string is not a valid Base64 sequence or was encoded using a different character set.

Are there limits on the input size?

The tool can handle large strings, but performance may vary depending on your browser's memory capacity.

API Documentation

Request Endpoint

POST /en/api/tools/base64-encoder

Request Parameters

Parameter Name Type Required Description
textInput textarea Yes -
operation select Yes -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-base64-encoder": {
      "name": "base64-encoder",
      "description": "Encode and decode Base64 strings",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=base64-encoder",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]