Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings back to plain text

Result

About the Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to readable text instantly. Base64 converts data into a safe set of 64 characters (A–Z, a–z, 0–9, + and /) that survives systems which can only handle plain text.

You'll meet Base64 constantly in development: embedding small images directly in CSS or HTML as data URIs, email attachments (MIME encodes everything this way), HTTP Basic Authentication headers, JWT tokens (each part is Base64-encoded), API payloads carrying binary data, and configuration files storing certificates or keys.

One critical point: Base64 is encoding, not encryption. Anyone can decode it in a second — including with this tool. It exists to make binary data transport-safe, not to hide it. Never use Base64 to protect passwords or sensitive information; use proper encryption or hashing for that. Encoding here happens in your browser, nothing is transmitted.

Frequently Asked Questions

No. It is reversible encoding with no key or secret — anyone can decode it instantly. Never use it to protect sensitive data.
Those are padding characters. Base64 works in 3-byte groups; when the input doesn’t divide evenly, one or two = signs pad the final group.
Encoding expands size by about 33%, because every 3 bytes become 4 characters. That’s the trade-off for text-safe transport.
This tool handles text. For images, an image-to-Base64 converter is needed — the same principle, applied to binary file data.

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