Base64 Encoder & Decoder Online
Quickly convert plain text into Base64 format or decode Base64 strings back into readable text. Ideal for web developers, data serialization, API payload debugging, and URL-safe parameter testing.
How to Encode and Decode Base64
- 1
Select mode
Choose whether you want to "Encode" plain text into Base64 or "Decode" an existing Base64 string.
- 2
Input your text
Type or paste your text or Base64 string into the input container.
- 3
Copy output
Review the live converted text in the output box and click Copy to extract your result.
Base64 Converter Features
Bidirectional Conversion
Seamlessly toggle between encoding plain text to Base64 and decoding Base64 strings back to readable text.
Full UTF-8 Character Support
Accurately handles multi-byte UTF-8 sequences, international alphabets, and emoji characters without corruption.
Real-Time Processing
Instant conversion displays the translated output dynamically as you type or paste input content.
Client-Side Data Privacy
Encoding and decoding happen entirely in your browser; your text inputs are never sent to external servers.
Quick Actions & Clipboard
Easily swap input and output directions, clear fields, or copy the computed result with one click.
What is Base64 Encoding and Decoding?
Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. Standardized under RFC 4648, Base64 is designed to carry data stored in binary formats across channels that only reliably support text content, such as email via MIME or HTTP POST bodies.
The Base64 alphabet consists of 64 characters: uppercase letters A-Z, lowercase letters a-z, digits 0-9, and two symbols (+ and /), with an optional padding character (=). Each Base64 character represents exactly 6 bits of data, meaning three 8-bit bytes of binary data are converted into four 6-bit Base64 characters (a 33% increase in size).
Our online Base64 converter supports full UTF-8 character encoding, ensuring that special unicode symbols, non-Latin alphabets, and emojis are accurately converted and decoded without garbled text or data loss.
Frequently Asked Questions
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