Base64 Decoder

Our free online Base64 Decoder tool makes it simple to decode any Base64 encoded string or file. This tool assists you in accurately and quickly converting Base64 back into its original binary or human readable format whether you're working with encoded credentials, embedded image data or API responses.

Base64 decoding: what is it?

Process of returning Base64 encoded string to its original binary form is known as Base64 decoding. Base64 is frequently used to convert binary data such as files encrypted text and images into ASCII format for safe transmission over text only networks like JSON or email. In order to recover original content decoding reverse the process.

Why Use a Base64 Decoder?

Base64-encoded strings often appear in:

• Image data embedded in HTML or CSS
• Credentials or tokens in HTTP headers
• Binary attachments in email (MIME format)
• Serialized API data in Base64 format

Our tool simplifies the decoding process so you can instantly view or extract the original content.

How to Use the Base64 Decoder Tool

1. Either upload a .txt or.b64 file with Base64 data or paste the Base64 encoded string into the input field.
2. Press the "Decode" button.
3. Examine and duplicate the decoded output (binary, image or text).

Tool Features

• Instant Decoding: Instantaneous Base64 to Binary or Text Conversion
• Multiple Input Types: Drag and drop, upload or paste Base64 data.
• Secure & Offline: Your browser does all of the decoding locally.
• Auto-Detection: Automatically determines if the output is a file or plain text.

Example

Encoded: SGVsbG9CYXNlNjQ=

Decoded: HelloBase64

Common Use Cases

• Previewing a Base64-embedded image or file data
• Debugging authentication headers or API payloads
• Recovering original strings from sources that are Base64 encrypted
• Obtaining encoded logs or configuration data

Privacy and Security

We never upload your data to a server. Your browser handles all decoding tasks, giving sensitive or private content the highest level of privacy and security.