Base64 Converter

Encode text or files to Base64 and decode Base64 back to readable text - entirely in your browser.

Format Conversion100% private

Base64 Converter

Encode text or files to Base64 and decode Base64 back to readable text - entirely in your browser.

Output: 20 characters

How it works

  1. 1
    Type or paste textEnter plain text or a Base64 string in the input box.
  2. 2
    Pick the directionEncode converts text to Base64; decode converts Base64 back to text.
  3. 3
    Copy the resultClick the copy button to grab the output. Everything runs locally.

Frequently asked questions

What is Base64?
Base64 encodes binary data as ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's commonly used to embed images or data in emails, URLs, and JSON.
Why does Unicode text change?
Non-ASCII characters (like emoji and non-English scripts) are first UTF-8 encoded, which makes the Base64 output longer but correct. Decoding returns the original text.
Is my data sent anywhere?
No. All encoding and decoding happens locally in your browser with standard Web APIs. Nothing is uploaded.

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