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Base64 Encoder / Decoder

Free online Base64 encoder and decoder. Encode or decode text and Base64 strings instantly in your browser. No signup required.

✓ Free ✓ No signup ⚡ Instant

Plain Text Input

Base64 Output

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📊 Results ready — export or share

What is Base64 Encoding?

Base64 is an encoding scheme that converts data into a text string using 64 ASCII characters (A-Z, a-z, 0-9, +, /). In practice, this tool is most useful for text payloads, Base64 strings, data URLs, and API-related workflows.

Common Uses of Base64

API authentication — Basic Auth headers use Base64 to encode username:password
Data URLs — Embedding images directly in HTML/CSS with data:image/png;base64,...
Email attachments — MIME encoding uses Base64 to transmit binary files
JWT tokens — JSON Web Tokens use Base64url encoding