What is Base64 encoding used for?

Base64 encoding is used for transmitting binary data over text-based protocols like email, storing binary data in text files, embedding images in HTML/CSS, and API data transmission.

When should I use URL-safe Base64?

Use URL-safe Base64 when the encoded data will be used in URLs, filenames, or any context where + and / characters might cause issues. It replaces + with - and / with _.

Does Base64 encoding provide security?

No, Base64 is an encoding method, not encryption. It can be easily decoded by anyone. Use proper encryption if you need to secure sensitive data.

Why does Base64 increase data size?

Base64 encoding increases data size by approximately 33% because it represents 6 bits of data using 8 bits (one ASCII character), making it less efficient but text-safe.

Base64 Converter

Encode and decode Base64 strings for data transmission, storage, and web development. Supports both standard and URL-safe Base64 encoding formats.

Base64 Converter

Encode (Text → Base64)Decode (Base64 → Text)

URL-Safe Base64(uses - and _ instead of + and /)

Text Input

0 chars | 0 bytes

Base64 Output

0 chars | 0 bytes

About Base64

Base64 is an encoding scheme that converts binary data into ASCII text using 64 characters (A-Z, a-z, 0-9, +, /).

Common Uses:

Email attachments (MIME)
Data URLs in web pages
API data transmission
Configuration files
Embedding images in CSS/HTML

URL-Safe Base64

URL-Safe encoding replaces characters that have special meaning in URLs:

+ becomes -
/ becomes _
Padding = is often removed

Use this for URLs, filenames, and web-safe applications.