IT operations

Base64 Encode / Decode

Encode plain text to Base64 or decode Base64 strings to readable text. Use this Networking and IT tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
Related tools

Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

Base64 encoding converts binary data to ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). Commonly used in email, data URLs, and API tokens. Each 3 bytes of input produce 4 Base64 characters.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

What is Base64 used for?

Base64 is used to encode binary data for text-based systems: email attachments (MIME), data URIs in HTML/CSS, JWT tokens, and HTTP Basic Auth headers.