Base64 Encode
& Decode

🔐 Instantly encode or decode Base64 strings online. Perfect for API payloads, data URLs, and email attachments.

✅ 100% Free🔓 No Login Required🔒 Runs in Browser

Instant Processing

Unicode Support

100% Private

Plain Text Input

0 characters

Base64 Output

0 characters

⚡ Quick Examples — click to try

🔧 How It Works

Encode or decode Base64 strings in just a few seconds

Paste Your Text

Enter plain text to encode into Base64, or paste a Base64 string to decode back to plain text

Choose Encode or Decode

Select whether you want to encode text to Base64 or decode a Base64 string back to readable text

Copy or Download Result

Copy the result to your clipboard instantly or download it as a text file for later use

Frequently Asked Questions

Everything you need to know about Base64 encoding and decoding

Do I need to sign up or log in to use this tool?

No. All QuickTextTools are completely free to use online with no login, signup, or account required.

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that converts binary data into a set of 64 printable ASCII characters. It is widely used in email attachments, data URLs, and API payloads to safely transmit binary data over text-based protocols.

What is the difference between encoding and decoding?

Encoding converts plain text or binary data into a Base64 string. Decoding reverses the process, converting a Base64 string back into its original plain text or binary form.

Does this tool support Unicode and special characters?

Yes. The encoder fully supports Unicode characters including emojis, accented letters, and non-Latin scripts by using UTF-8 encoding before converting to Base64.

Is my data sent to any server?

No. All encoding and decoding happens entirely in your browser using JavaScript. No data is ever sent to any server, ensuring complete privacy.

What happens if I input an invalid Base64 string?

The tool will display a clear error message telling you the input is invalid. Common issues include incorrect padding, invalid characters, or incomplete strings.