Base64 Encoder / Decoder
Developer ToolsEncode & decode Base64 strings
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Base64 output will appear here...About Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text. Supports UTF-8 and binary data.
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Frequently Asked Questions
What is Base64 encoding and when is it used?
Base64 is a binary-to-text encoding scheme that converts data into printable ASCII characters. Developers commonly use it to embed images in HTML or CSS, transmit binary data in JSON APIs, encode email attachments, and store small files in configuration formats like XML.
How do I encode or decode Base64 text online?
Select Encode or Decode mode, paste your input, and the result appears instantly. For encoding, enter plain text and get the Base64 string. For decoding, paste a Base64 string and see the original text. Copy the output with one click.
Does this Base64 tool support UTF-8 and Unicode characters?
Yes. The tool handles full UTF-8 encoding, so you can safely encode and decode text containing international characters, emojis, accented letters, and special symbols. This avoids the common "invalid character" errors found in simpler Base64 implementations.
Is my data safe when encoding Base64 here?
Yes. All encoding and decoding runs entirely in your browser. Your text and Base64 strings are never sent to any server. This makes it safe for encoding API keys, tokens, or any sensitive data you need in Base64 format.
What is URL-safe Base64 and how does it differ from standard?
URL-safe Base64 replaces "+" with "-" and "/" with "_", and omits the trailing "=" padding characters. This variant is safe for use in URLs, query parameters, and filenames. It is the standard encoding used in JWT tokens, OAuth signatures, and many web APIs.
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