What is Base64 Encode?

A tool for converting text into a Base64 string. It is useful when you want to check a value before sending it to an API, encode text for use in a URL, or process multi-line input line by line.

The result updates in real time as you change the input or settings.

How to Use

1. Enter the text you want to encode in the input area on the left.
2. Turn on options such as line-by-line encoding or URL-safe conversion if needed.
3. Check the Base64 result in the output area on the right.

Encoding Options

Encode Line by Line

This setting controls whether multi-line text should be encoded as one block or line by line.

• Enabled - Encode each line individually (convenient for batch processing)
• Disabled - Encode entire text including newlines as a single unit

Enable it when you want to process multiple values one line at a time. Disable it when you want to encode the entire text exactly as written, including line breaks.

Convert to URL-safe Format

Standard Base64 contains characters like + and / that can cause issues in URLs.

• Enabled - Replace + with - and / with _ for URL-safe format
• Disabled - Use standard Base64 format

URL-safe output is useful for query parameters and URL fragments. If you need regular Base64 for another system, leave this option off.

Input and Output Example

hello@example.com

When you enter a string like this, the result becomes:

aGVsbG9AZXhhbXBsZS5jb20=

Use Cases

• Checking a string in Base64 before sending it to an API
• Encoding values in a URL-safe format for use in URLs
• Converting multi-line input one line at a time
• Inspecting values related to auth headers or token-like strings

How Base64 Works

Base64 encoding represents data using 64 characters (A-Z, a-z, 0-9, +, /) plus = when padding is needed.

Original data: Man
Binary: 01001101 01100001 01101110
6-bit groups: 010011 010110 000101 101110
Base64 conversion: T W F u

Things to Keep in Mind

• Base64 is encoding, not encryption
• When line-by-line encoding is enabled, each line becomes a separate Base64 result
• URL-safe output is convenient, but some systems expect standard Base64 instead

For details, refer to RFC 4648.