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Base64 Encoder/Decoder

Encode or decode Base64 strings instantly. Convert text to Base64 and back with our free tool.

How to Use Base64 Encoder/Decoder

1

Paste or type your text

Enter the text or data you want to encode in the input field. Supports any characters including Unicode and special symbols.

2

Choose encode or decode

Select "Encode" to convert plain text to Base64, or "Decode" to convert a Base64 string back to readable text.

3

Copy the result

Click the copy button to copy the encoded or decoded output to your clipboard for use in your code, API calls, or documents.

About Base64 Encoder/Decoder

Encode and decode Base64 strings online for free with our Base64 Encoder/Decoder tool. Convert any text, JSON, HTML, or binary data to Base64 format instantly. Commonly used by developers for embedding images in CSS/HTML, encoding API authentication tokens, transmitting binary data through text-based protocols, and preparing email attachments. Supports full UTF-8 and Unicode characters. All processing happens entirely in your browser, so your sensitive data stays completely private.

Key Features

  • Encode text to Base64 and decode Base64 back to plain text instantly
  • Full support for UTF-8, Unicode, and binary content encoding
  • Handle large inputs efficiently with real-time conversion
  • One-click copy and clear buttons for fast workflow
  • Works entirely in your browser — your data never leaves your device
  • No signup, no limits, and completely free to use

Frequently Asked Questions

How to encode text to Base64 online for free?▾
Simply paste your text into our Base64 Encoder tool, click "Encode", and copy the Base64 output. No signup or payment required — it's completely free.
How to decode Base64 to text online?▾
Paste your Base64-encoded string into the input field, select "Decode", and the original text will appear instantly. Works with any valid Base64 string.
What is Base64 encoding?▾
Base64 is a binary-to-text encoding scheme that represents binary data as ASCII characters using 64 printable characters (A-Z, a-z, 0-9, +, /). It's commonly used to embed data in text-based formats like JSON, HTML, and email.
Is Base64 encoding the same as encryption?▾
No. Base64 is an encoding scheme, not encryption. It's easily reversible by anyone and provides no security. Use proper encryption tools like AES for protecting sensitive data.
When would I need Base64 encoding?▾
Common uses include embedding images in CSS/HTML as data URIs, encoding API authentication headers (Basic Auth), transmitting binary data through text-based protocols like JSON or XML, and encoding email attachments.
Is this Base64 encoder safe and private?▾
Yes. All encoding and decoding happens entirely in your browser using JavaScript. Your data is never sent to any server, making it safe for sensitive content.
Does this tool support UTF-8 and Unicode?▾
Yes. Our Base64 encoder fully supports UTF-8 encoding, including Unicode characters, emojis, and special symbols from any language.
What is the maximum input size?▾
There is no hard limit. The tool handles large inputs efficiently, though extremely large files may be slower depending on your browser and device memory.