Is Base64 encryption?

No. Base64 is encoding, not encryption. Anyone can decode it, so never use it to protect secrets.

Why is encoded text longer than the original?

Base64 represents three bytes with four characters, so encoded output is roughly one third larger than the input.

Encode plain text to Base64 or decode Base64 back to readable text. Common for APIs, data URIs, and debugging encoded payloads in the browser.

Convert UTF-8 text to Base64 and back. Handy for quick payloads and debugging.

Plain text

Base64

Example: The word "hello" encodes to "aGVsbG8=".

Is Base64 encryption?: No. Base64 is encoding, not encryption. Anyone can decode it, so never use it to protect secrets.
Why is encoded text longer than the original?: Base64 represents three bytes with four characters, so encoded output is roughly one third larger than the input.