Base64 encode decode

What is this tool?

Convert UTF-8 text into standard Base64 or decode that representation back into text. Base64 helps transport bytes through text-based systems. It is not a password vault, encryption service or way to conceal sensitive information.

How to use it

1. Read the input labels and limits below, then choose the operation that matches your task.
2. Choose whether to encode plain text or decode Base64.
3. Paste the value and run the matching operation.
4. Review the output, then copy or download it if needed.
5. Check the result against the worked example or original file before copying, downloading or using it elsewhere.

Worked example

The text Hello encodes as SGVsbG8=. A decoded value may look different if it was produced from binary data or a different character encoding. This page expects text that can be interpreted as UTF-8.

Questions & limits

How to use base64 encoder

Encode converts text to UTF-8 bytes, then standard Base64. Decode checks standard Base64 syntax and decodes the bytes as UTF-8. Whitespace in encoded input is ignored. The result can be copied or downloaded as a text file.

A practical example

Hello encodes to SGVsbG8=. Unicode text is converted to UTF-8 first, so accented letters and emoji can also round-trip.

Know the limits

Base64 is encoding, not encryption. Anyone can decode it. This tool handles UTF-8 text, not arbitrary binary files, and uses standard Base64 rather than the URL-safe variant.

Tool documentation updated October 4, 2026.

Does Base64 protect private information?

No. Base64 is reversible encoding, not encryption. This utility handles UTF-8 text. Anyone who has the encoded value can decode it.

Why does a URL-safe token fail?

The URL-safe Base64 variant uses different characters and may omit padding. This page validates standard Base64, so a token from another variant may need a tool matching that exact format.

Check the receiving system

Use a small known example first when connecting this result to an application. Encoding, formatting and color conversion each follow specific conventions, and the receiving system must expect the same convention. Keep an unchanged copy of important input before transforming it. Review identifiers and punctuation carefully rather than relying only on whether the operation completed. This page runs a focused utility; it does not validate the full behavior, security or business rules of the application where you will use the output.