Encode API Data in Base64

Encode credentials, tokens, and payloads to Base64 for use in HTTP headers and API requests.

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Text to encode

API tips

🔌

HTTP Basic Authentication encodes "username:password" in Base64 and sends it as "Authorization: Basic <encoded>" in the request header.

🔑

JSON Web Tokens (JWTs) use Base64URL encoding for their header and payload sections. Paste a JWT to decode and inspect its claims.

🛡️

Base64 is encoding, not encryption. It's not secure on its own — always transmit Base64 credentials over HTTPS.

💡

Some APIs require Base64-encoded request bodies or file attachments. Encode your data here and paste directly into your API client.

输入

Enter your data into the tool above. Everything stays local to your browser.

处理

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

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