What is Base64 encoding used for?

Base64 encodes binary data as ASCII text for transport in text-only systems such as email (MIME), JSON and XML, and data URIs.

What is URL-safe Base64?

URL-safe Base64 replaces '+' with '-' and '/' with '_' to avoid reserved URL characters. Padding '=' may be omitted depending on the target system.

Is the conversion done client-side?

Yes. All encoding and decoding happens in your browser so your data is not uploaded to a server.

Base64 Encoder & Decoder (Text ↔ Base64)

Options

URL-Safe Base64

Replace '+' with '-' and '/' with '_' for URL compatibility

Remove Line Breaks

Strip all newlines from input/output

Trim Spaces

Remove leading and trailing whitespace

Include Padding

Add '=' padding characters to meet Base64 standards

About Base64 Encoding

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used when there's a need to encode binary data that needs to be stored and transferred over media that are designed to deal with text.

This ensures that the data remains intact without modification during transport. Base64 is commonly used in a number of applications including email via MIME, and storing complex data in XML or JSON.

Where is Base64 used?

Email Attachments: For sending binary files through email systems that only support text
Data URIs: Embedding images directly in HTML/CSS as base64 strings
Cryptography: For encoding certificates and cryptographic keys
Web APIs: When transmitting binary data over HTTP in JSON format
XML/HTML: For including binary data in text documents

Text to Base64 Encoder/Decoder

Conversion Tool

Options

Advanced Analysis

Character Distribution

About Base64 Encoding

Where is Base64 used?