No. It's encoding, not encryption.

Why does Base64 increase size?

It adds ~33% overhead due to encoding.

When should I use URL-safe Base64?

When the value will appear in URLs.

DevToolStack

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 strings back to plain text.

base64encodedecodebinarytext

URL-Safe Base64 (replace +/ with -_)

Plain Text

Base64 Output

Output will appear here...

Note: Base64 encoding increases data size by ~33%. It’s used for safely transmitting binary data through text-based protocols, not for encryption.

Base64

Binary-to-text encoding used in APIs, emails, JWT, data URLs.

Not encryption

Anyone can decode Base64. Don't use it to hide secrets.

Frequently Asked Questions

Quick answers about usage, privacy, and best practices.

View all FAQs

Privacy: Everything runs locally in your browser. No data is sent to a server.

Related Tools

View All

URL Encoder/Decoder

Encode special characters for URLs or decode percent-encoded strings.

JWT Decoder

Decode and inspect JSON Web Tokens (JWT) to view header, payload, and signature info.

JSON Formatter & Validator

Format, validate, and beautify JSON with error detection.

Privacy First: This tool runs entirely in your browser. No data is sent to any server.