Base64 Encode Decode Online
Base64 encoding is a method for converting binary data (like images, files, or arbitrary bytes) into a textual format using only 64 ASCII characters.
It’s commonly used to safely transmit data over media designed to handle text, like email or JSON.
You can change text in both textarea`s, and it will be encoded/decoded on the fly.
Security note : data is not being sent to the back-end, data is being processed only on client side!
Overview
This page provides a simple and secure way to work with Base64 using a Base64 encoding and decoding tool that performs all operations directly in your browser. No data is sent anywhere — everything happens locally on the client side.
Base64 is a common method for converting binary data such as text, JSON, files, or arbitrary bytes into a safe textual representation. It is widely used in email, APIs, web applications, and data transmission systems.
With this tool, you can encode Base64 online or decode it instantly, with results updating the moment you type.
How to use the Base64 converter
The interface contains two text areas:
Left panel — Encode
Paste or type any text, and it will be processed by the Base64 encoder online instantly.
You can then:
- copy the result
- download the encoded text
- clear the field
Right panel — Decode
Insert any Base64 string to convert it back to readable text using the built-in Base64 decoder online.
Available actions:
- copy decoded content
- download the result
- clear the field
Both sides work independently, allowing you to switch between encoding and decoding with no manual toggles.
Features
Real-time processing
The tool updates results on the fly the moment text is entered.
Local client-side execution
The tool is designed for privacy — decoding and encoding happen only in the browser.
This makes it ideal for sensitive content.
Export options
Each panel allows you to download results as a .txt file for convenient sharing or integration.
Instant copy actions
Fast clipboard copying saves time when working with scripts or development tools.
When to use this tool
You can convert Base64 online for tasks like:
- encoding small files or text for API requests
- converting data for JSON or XML transport
- handling email MIME content
- debugging Base64 strings in development
- quick one-off conversions without installing software
Whether you need to decode Base64 online, re-encode content, or simply inspect a value, this tool provides fast and reliable functionality for everyday development workflows.
Example conversions
Text → Base64
|
Hello world |
Becomes:
|
SGVsbG8gd29ybGQ= |
Base64 → Text
|
VGVzdCBkYXRh |
Becomes:
|
Test data |
Try it now
Use the left panel to Encode Base64 online and the right panel to Decode Base64 online.
This all-in-one Base64 encode and decode online environment makes conversions simple, secure, and instant.