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    Base64 Encoder & Decoder

    Instantly encode text to Base64 or decode it back from Base64. Unicode is supported.

    Runs in your browser, no data sent Free · No sign-up required
    TWVyaGFiYSBDbG91LlRSISDwn5qA

    When is Base64 used?

    Base64 comes into play when you need to carry binary data over a text-based channel: examples include embedding small images in CSS (data URI), sending files inside JSON, passing API credentials (Basic Auth), and encoding email attachments.

    Remember: Base64 is an encoding, not encryption, and does not hide your data. This tool runs entirely in your browser; the text you enter is never sent to any server.

    Frequently Asked Questions

    Base64 is an encoding method that represents binary data using only text characters (A–Z, a–z, 0–9, +, /). It is commonly used to embed images in HTML/CSS, carry email attachments (MIME), and transfer data.

    No. Base64 is not encryption, only an encoding. Anyone can easily decode it. So it should never be used to protect passwords or sensitive data; encryption is required for that.

    Yes. Base64 encoding grows data by about 33% (every 3 bytes become 4 characters). For that reason, serving very large files directly rather than embedding them as Base64 is better for performance.

    Yes. This tool handles UTF-8 encoding correctly; it can seamlessly encode and decode all Unicode characters, including Turkish characters (ç, ğ, ş, etc.) and emoji.

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