Base64 Decoder

Decode from Base64 format with various advanced options. Fast, secure, and completely browser-based Base64 decoding.

About Base64 Decoder

Overview

Our Base64 Decoder is a straightforward tool for converting Base64 encoded data back into its original, readable form. Base64 is often used to represent binary data in text-based systems. This decoder safely reverses that process on your device. Common applications include decoding data from emails, XML or JSON files, and web applications.

Features

  • Instant decoding with live mode for UTF-8.
  • Supports over 40 character sets for the output.
  • Option to auto-detect the character encoding.
  • Can process multiple entries line by line.
  • Allows file uploads up to 100MB.
  • One-click copy to clipboard.
  • Clear error messages for invalid Base64 input.
  • All operations are performed in your browser, keeping your data private.
  • Includes a dark mode for comfortable use.
  • A clean and professional design.
  • Works well on mobile devices.

How to Use

  1. Enter your Base64 data into the input field.
  2. Select the correct character set for the output. UTF-8 is a good choice for most situations.
  3. For multiple entries, you can choose to decode each line separately.
  4. Turn on live mode for instant decoding as you type, which works best with UTF-8.
  5. Click the decode button to see the result.
  6. The decoded text will appear in the output box.
  7. You can copy the result with a single click.
  8. For files up to 100MB, use the file upload option.

FAQ

What is Base64 decoding?

Base64 decoding is the process of converting a Base64 encoded string back to its original form. This is often done to change binary data that was stored or sent as text back to its binary format.

Why does my decoded text look strange?

This can happen if you select the wrong character set for decoding. Make sure you choose the correct character encoding, like UTF-8, that matches the original data. If you are not sure, try different options or use the "auto-detect" feature.

Is it safe to decode my data here?

Yes, it is secure. This tool decodes everything in your browser, and your data is never sent to our servers. This ensures your information stays private.