Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 to text instantly.
Paste text to encode it to Base64, or paste Base64 to decode it back to text. This tool runs entirely in your browser—no data is uploaded.
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What is Base64 Encoder / Decoder?
Base64 Encoder/Decoder is a free online tool that converts text to Base64 encoding and vice versa. Base64 is commonly used to encode binary data for transmission in text-based formats like JSON, XML, or email.
When Should You Use This Tool?
Use this tool when you need to encode data for APIs, decode Base64 strings from web services, handle authentication tokens, or embed binary data in text formats.
How to Use Base64 Encoder / Decoder
- 1Select "Encode" or "Decode" mode.
- 2Paste your text or Base64 string into the input area.
- 3The result appears instantly in the output area.
- 4Copy the result using the Copy button.
How Does This Tool Work?
This tool uses the browser's built-in btoa() and atob() functions to perform Base64 encoding and decoding. All processing happens locally—no data is sent to any server.
Privacy Note: Runs entirely in your browser. Your data never leaves your device. No file uploads to any server.
Common Use Cases
Developers
Encode API payloads and decode JWT tokens.
DevOps
Handle Base64-encoded secrets in configuration files.
Security Analysts
Decode obfuscated data for analysis.