Base64 Encode/Decode Online
Free tool for Base64 encoding and decoding. UTF-8 support, instant browser processing.
Your data is processed locally in the browser and never sent to a server.
About Base64 Encoder
Base64 is a method of encoding binary data into text format using 64 ASCII characters. This allows safe transmission of binary data through text protocols such as email or JSON.
Our tool supports full UTF-8 specification, meaning proper handling of Cyrillic, emoji, and other special characters. Encoding and decoding happen instantly as you type.
All operations are performed locally in your browser using native JavaScript functions. Your data is not sent to a server and remains completely confidential.
Base64 Use Cases
Embedding Images
Convert images to Data URLs for embedding in HTML and CSS.
API and JSON
Encode binary data for transmission via REST API and JSON.
Email Attachments
Encode files for transmission via email protocols (MIME).
Basic Authentication
Encode credentials for HTTP Basic Authentication.
Benefits
UTF-8 Support
Proper handling of Cyrillic, emoji, and all Unicode characters.
Instant Processing
Encoding and decoding happens in real-time.
Security
All operations are local, data never leaves your browser.
FAQ
What is Base64?
Base64 is a method of encoding binary data into text using 64 ASCII characters (A-Z, a-z, 0-9, +, /).
Why use Base64?
Base64 is used for safe transmission of binary data through text protocols and embedding files in code.
Is Cyrillic supported?
Yes, our tool fully supports UTF-8, including Cyrillic, emoji, and other Unicode characters.
Is it safe?
Yes, all operations are performed locally in your browser. Data is not sent to a server.
Can I decode it back?
Yes, use 'Decode' mode to convert Base64 back to plain text.