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Base64 Encoder/Decoder

Encode and decode Base64 strings for authentication headers in n8n HTTP Request nodes

Output will appear here...

How to use in n8n

HTTP Basic Authentication

For APIs that require Basic Auth, encode your credentials in the format username:password

Header: Authorization
Value: Basic <your-base64-encoded-credentials>

In n8n HTTP Request Node

Add a header with name Authorization and value Basic [encoded-string]

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What is Base64 Encoding and Why You Need It

Base64 encoding is a method of converting binary data into ASCII text format. It's essential for transmitting data safely over systems that only handle text, such as email protocols, URLs, and HTTP headers. This free Base64 encoder and decoder helps you convert text instantly in your browser.

The Problem: Sending Credentials Over HTTP

Many APIs require authentication credentials to be sent in HTTP headers. However, credentials often contain special characters that can break HTTP requests. Without proper encoding, your API integrations will fail with authentication errors that are difficult to debug.

  • HTTP Basic Authentication requires Base64-encoded credentials
  • Special characters in passwords break HTTP headers
  • Binary data cannot be sent directly in text-based protocols
  • Manual encoding is error-prone and time-consuming

The Solution: Free Online Base64 Converter

This free Base64 converter online tool instantly encodes and decodes text with full UTF-8 support. Perfect for creating authentication headers, encoding data for URLs, or debugging encoded strings you receive from APIs.

Common Uses for Base64 Encoding

  • HTTP Basic Auth - Encode username:password for Authorization headers
  • API Keys - Safely encode API credentials for transmission
  • Data URLs - Embed images and files directly in HTML/CSS
  • Email Attachments - Encode binary files for SMTP transfer
  • JWT Tokens - Base64URL encoding for token segments

How Base64 Encoding Works

Base64 converts binary data into a 64-character alphabet consisting of A-Z, a-z, 0-9, +, and /. Every three bytes of input become four Base64 characters. The = character pads the output when input length isn't divisible by three.

For example, encoding username:password for HTTP Basic Authentication produces: dXNlcm5hbWU6cGFzc3dvcmQ=

Perfect for n8n HTTP Request Nodes

When building n8n automation workflows that connect to APIs using Basic Authentication, you need to encode Base64 credentials. This tool helps you:

  • Generate Authorization header values for HTTP Request nodes
  • Encode credentials for APIs that don't support OAuth
  • Debug authentication issues by decoding existing headers
  • Prepare API keys and secrets for secure transmission

Why Choose This Base64 Encoder?

  • Free Forever - No sign-up or usage limits
  • 100% Private - All encoding happens in your browser
  • UTF-8 Support - Properly handles special characters and emojis
  • Instant Conversion - Results appear as you type
  • Quick Presets - Common templates for Basic Auth and API keys