Base64 Encoder/Decoder
Encode and decode Base64 strings online. Support UTF-8, URL-safe mode. 100% free, runs in your browser.
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Features
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100% Free
No signup required. No limits on usage. Simple and fast online tools.
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Privacy First
All processing happens in your browser. Your data never leaves your device.
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UTF-8 Support
Full Unicode support including CJK characters, emoji, and URL-safe encoding.
Base64 Encoder & Decoder
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used to encode data for transmission over media designed to handle text, such as email or URLs. Our online Base64 encoder/decoder helps you convert text to Base64 and back instantly.
How to use
- Enter your text or Base64 string in the input box
- Click "Encode" to convert text to Base64
- Click "Decode" to convert Base64 back to text
- Use "Swap" to move the output to the input box
- Copy or download the result
Common use cases
- Encoding data URLs and API parameters
- Decoding Base64 tokens and payloads
- Embedding binary data in JSON or XML
- URL-safe Base64 for web applications