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All utility tools process your data entirely in your browser. No inputs or files are ever sent to a server.

Base64 Encode

Encode text or files to Base64 format.

Documentation & User Guide

Base64 Encoder Guide

Base64 Encoding is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is designed to allow binary data to be transmitted over channels that only support text formatting (such as email, HTML, or JSON payloads). Base64 converts every 3 bytes (24 bits) of source data into 4 characters (24 bits) from a standardized 64-character set, ensuring data integrity is maintained during transport.

⚙️ Key Features

  • Encodes plain text strings or uploaded binary files securely in the browser.
  • Supports standard Base64 encoding as well as Url-Safe Base64 variant options.
  • Visual preview of output format with character count and size estimation.
  • One-click copying and direct file downloads for large encoded payloads.

📖 How to Use

  1. Input or paste the plain text string you wish to encode into the text area, or upload a local file.
  2. Select the encoding options if necessary (such as standard encoding vs. URL-safe encoding).
  3. The encoded Base64 ASCII string will generate in real time in the output pane.
  4. Click 'Copy' to copy the encoded string to your clipboard, or download it directly as a text file.
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Privacy & Security:

All encoding operations are performed locally in your browser using JavaScript. No text, credentials, or uploaded files are sent to any external server.

Frequently Asked Questions (FAQ)

Does Base64 encoding encrypt my data?

No, Base64 is not a form of encryption. It is a public encoding format that anyone can reverse. It is used solely to format data for transmission, not to hide or secure it.

What is URL-Safe Base64 encoding?

Standard Base64 uses '+' and '/' characters, which have special meanings in URLs and can cause parsing issues. URL-safe Base64 replaces these characters with '-' and '_' respectively to make the output safe for query parameters and URI paths.

Why does Base64 output look larger than the original input?

Base64 encoding increases the file size by approximately 33%. This overhead occurs because every 3 bytes of binary input data are represented by 4 ASCII characters in the final output.