Base64

What Is Base64?

Base64 is an encoding scheme that converts binary data or text into a string of 64 printable ASCII characters. It's widely used to safely transmit data over text-based channels — such as embedding images in HTML, passing binary data in JSON, or encoding authentication credentials in HTTP headers.

The encoded output is about 33% larger than the original but is guaranteed to contain only characters that won't be altered by text-based protocols.

How to Encode and Decode Base64

1. Choose encode or decode operation
2. For encoding: paste plain text into the input field
3. For decoding: paste Base64 string into the input
4. View the result instantly and copy to clipboard

Features

• Encode plain text to Base64 format
• Decode Base64 strings back to readable text
• Support for all character encodings
• Real-time conversion with instant preview

Common Use Cases

• Encoding API credentials for Basic Auth HTTP headers
• Embedding small images as data URIs directly in HTML or CSS
• Decoding Base64-encoded JWT payloads to inspect their contents

Why Use ToolPop Base64 Tool

• Encodes and decodes Base64 in both standard and URL-safe variants
• Handles Unicode text with proper UTF-8 encoding before conversion
• Shows character count of both original and encoded output

ToolPop vs atob/btoa in the Console

Browser console functions atob and btoa handle Base64 but don't support Unicode strings correctly, often throwing errors on non-ASCII text. ToolPop wraps the encoding in proper UTF-8 handling so it works reliably with any language or character set.

Tips

• Encode credentials or sensitive data for storage
• Decode Base64 attachments or email data
• Use Base64 for embedding text in URLs or configuration files

Frequently Asked Questions

Is Base64 encryption? Is it secure?

No. Base64 is encoding, not encryption. It's easily reversible and should not be used for sensitive data security.

Can it handle large files or binary data?

Yes. The tool can encode and decode large amounts of data including binary content in your browser.

Is encoding/decoding done locally without sending data anywhere?

Yes. All Base64 conversions happen entirely in your browser for complete privacy.

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