Base64 Calculator: The Complete Guide
Encode and decode Base64 in one place. Type text to convert it to Base64, or paste Base64 to decode it back to readable text — with full UTF-8 support, all in your browser.
Who the Base64 Calculator is for
Developers and users encoding or decoding Base64 for data URIs, tokens, and config.
How to use the Base64 Calculator
- Type your values into the fields above — pick your currency or units where the calculator offers them.
- Results update automatically as you type; there's no submit button and nothing is sent to a server.
- Adjust any input to compare scenarios, then copy the result with a single click.
How it works
Encoding converts your UTF-8 text into the 64-character Base64 alphabet; decoding reverses it. Both run locally using your browser's native Base64 functions.
Features
- Encode & decode
- Full UTF-8 support
- Instant conversion
- Runs locally
What is Base64?
Base64 represents binary or text data using 64 printable ASCII characters, so it can travel safely through systems that only handle text — like JSON, HTML data URIs, and email. It's encoding, not encryption: anyone can decode it, so never use it to protect secrets. This tool converts both ways with correct UTF-8 handling.