Base64 Encode/Decode Tool

📄 Result

What Is Base64 Encoding?

Base64 is a way of representing binary or text data using only 64 printable ASCII characters (A-Z, a-z, 0-9, +, /). It's commonly used to safely embed data in text-based formats like URLs, JSON, emails, or HTML — not for security or encryption, but for safe transport and compatibility.

How to Use the Base64 Tool

  1. Choose "Encode" to convert regular text to Base64, or "Decode" to convert Base64 back to text.
  2. Enter or paste your text.
  3. Copy the converted result instantly.

How Base64 Works

Base64 encoding groups binary data into 6-bit chunks and maps each chunk to one of 64 printable characters, padding with "=" as needed. This makes any data — including binary files, images, or special characters — safely representable in plain text systems that only support standard ASCII characters.

Worked Example

Example: "Hello, World!"

Encoded: SGVsbG8sIFdvcmxkIQ==

The encoded string is longer than the original because Base64 always expands data by roughly 33%.

Common Uses for Base64

  • Embedding small images directly in HTML/CSS (data URIs).
  • Encoding email attachments (MIME).
  • Safely transmitting binary data in JSON or XML.
  • API authentication tokens and data payloads.

Important: Base64 Is Not Encryption

Base64 is an encoding scheme, not an encryption method — anyone can decode it instantly with any Base64 tool. Never use Base64 alone to protect sensitive data; use proper encryption for anything that needs to stay confidential. All processing here happens locally in your browser and is never sent to a server.

Frequently Asked Questions

No — Base64 is simply an encoding format, not encryption. Anyone can decode Base64 text instantly; it provides no confidentiality or security on its own.

Because it represents each 3 bytes of original data as 4 Base64 characters, increasing the size by roughly 33%.

Standard Base64 uses A-Z, a-z, 0-9, plus '+' and '/', with '=' used for padding at the end when needed.

Embedding images in HTML/CSS, encoding email attachments, safely transmitting binary data in text-based formats like JSON, and API tokens.

No — all encoding and decoding happens directly in your browser using JavaScript; nothing is transmitted to any server.