About This Tool

A Data URI is a scheme that embeds file data directly inside a URL using Base64 encoding. This tool decodes the Base64 segment and reconstructs the original binary image entirely within your browser environment. No server requests are made, and your data never leaves your device.

Designed for developers, designers, and security-conscious users, this utility ensures high performance through native browser APIs such as Blob, atob, and URL.createObjectURL.

Key Benefits

• 100% client-side processing for maximum privacy
• No image uploads or server-side storage
• Instant decoding with minimal memory overhead
• Supports PNG, JPG, SVG, WebP and more
• Mobile-friendly and globally accessible

Features

• Real-time Data URI validation
• Automatic MIME type detection
• Image preview before download
• Custom output file naming
• Clipboard copy support
• Local file to Data URI testing

Use Cases

• Extract embedded images from HTML or CSS files
• Debug Base64 image strings in APIs
• Recover images from JSON payloads
• Convert inline assets into standalone image files
• Security audits and data validation workflows

Historical Context

The Data URI scheme was standardized in RFC 2397 in 1998 to allow small files to be embedded inline within web documents. It became widely used for reducing HTTP requests and improving performance in early web optimization strategies before HTTP/2 multiplexing became common.

Fun Fact

Base64 encoding increases data size by roughly 33%. That means a 1 MB image encoded as a Data URI becomes approximately 1.33 MB. While convenient, large inline images can significantly increase page size if not managed properly.