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.

Въведете

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

Обработете

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

Изтеглете

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓Напълно безплатен — без скрити разходи, никога

✓Не се изисква акаунт, имейл или вход

✓Файловете никога не напускат устройството ви

✓Абсолютно без ограничения за размера на файла

✓Без водни знаци на никакъв резултат

Encode Images to Base64 for CSS

Convert small images and icons to Base64 data URLs

Encode Files to Base64 for Email

Encode file attachments to Base64 for MIME email c

Decode and Inspect JWT Tokens

Decode the header and payload sections of a JSON W

Encode Binary Data for Text Transfer

Encode files or binary data to Base64 so they can