Convert text into Base64 encoding

This tool converts text into Base64 encoding. It provides flexible options so you can encode the entire text, encode only words matching specified substring(s), encode all except words containing specified substring(s), or encode the entire text and format the output using a custom format. Simply enter your text and select the conversion mode that suits your needs.

Input Text

Encoded Text

Conversion Modes:

Convert Entire Text to Base64
Encodes the entire input text into Base64.

Convert Only Words Matching Specified Substrings to Base64
Scans each word and encodes only those words that contain the specified substring(s). Enter a comma‑separated list (e.g., hello, test).

Convert All Except Words Containing Specified Substrings to Base64
Encodes every word to Base64 except those that contain the specified substring(s). Enter a comma‑separated list (e.g., and, the).

Convert Entire Text with Custom Format
Encodes the entire text into Base64 and then applies a custom format. Use {encoded} as a placeholder for the Base64 output.

Examples:

Convert Entire Text to Base64

The entire input text is encoded into Base64.

Before:

Hello world!

After:

SGVsbG8gd29ybGQh

Convert Only Words Matching Specified Substrings to Base64

Only words containing the specified substring "test" are encoded.

Before:

This is a test. Testing is fun.

After (specifying "test"):

This is a dGVzdA==. VGVzdGluZy is fun.

Convert All Except Words Containing Specified Substrings to Base64

Encodes every word to Base64 except those that contain the substring "and".

Before:

Bread and butter go well together.

After (excluding "and"):

QnJlYWQ= and QnV0dGVyIGdvIHdlbGwgVG9nZXRoZXIu

Convert Entire Text with Custom Format

Encodes the entire text into Base64 and then displays it using a custom format.

Before:

Hello world!

After (format "[Encoded: {encoded}]"):

[Encoded: SGVsbG8gd29ybGQh]