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Base64 Encoder / Decoder

Base64
Input
0 chars
Output
About this tool

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 strings back to plain text — entirely in your browser, no data sent to any server.

Common use cases
Encode API credentialsEmbed images in CSSDebug MIME payloadsStore binary in JSONURL-safe encoding

Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters. It is commonly used to transmit binary data over text-based channels such as email (MIME), JSON, and HTML.

No. Base64 is an encoding scheme, not encryption. It does not protect data from being read — it simply represents binary data as text. Anyone can decode a Base64 string.

Standard Base64 uses + and / characters, which have special meanings in URLs. URL-safe Base64 replaces + with - and / with _ so the output is safe to use in URLs and filenames without additional encoding.

No. All encoding and decoding runs entirely in your browser using JavaScript. Your text and Base64 strings never leave your device.

Base64 is used for embedding images in CSS or HTML as Data URIs, encoding credentials in HTTP Basic Authentication headers, storing binary data in JSON or XML payloads, transmitting binary data in emails (MIME), and storing complex data in cookies or localStorage.

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