Base64 Encode / Decode

Encode text to Base64 or decode Base64 strings back to text. All processing happens locally in your browser.

URL-safe encoding (replace +/ with -_)

Remove padding (= characters)

Single line

Break every 64 chars

Break every 76 chars (MIME)

Input Output

Statistics
Input: 0 characters | Output: 0 characters

Paste your text or Base64 string into the input area.

Click Encode to convert to Base64, or Decode to convert back.

Copy the result to clipboard or download as a text file.

Data URIs
Embed images in HTML/CSS using Base64 data URIs.

Email Attachments
MIME encoding for email transmission.

API Authentication
Encode credentials for HTTP Basic Auth headers.

URL Parameters
Safely encode binary data in URL query strings.

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