Q: What's the difference between base64 and percent encoding?

Base64 is more compact for binary data and images, while percent encoding is human-readable for text. Base64 increases size by ~33%, while percent encoding varies based on special characters.

Q: Why does my Data URI make the file larger?

Data URIs have encoding overhead. Base64 adds ~33% size, plus MIME type headers. For small files, this is acceptable to avoid HTTP requests, but large files should use separate URLs.

Q: How does MIME type auto-detection work?

The tool analyzes content patterns: JSON structure, HTML/XML tags, CSS syntax, JavaScript keywords, and binary signatures for images. Manual override is available for accuracy.

Q: Are there size limits for Data URIs?

Browsers typically support 2-32MB Data URIs, but performance degrades significantly above 100KB. Keep Data URIs small (< 10KB) for best practices and avoid them for large media files.

Question 1

How do I convert to Data URI?

Accepted Answer

Paste your text or upload a file, select MIME type (or use auto-detection), choose encoding (base64 recommended), and convert. The tool generates a data: URL instantly for embedding in HTML, CSS, or JavaScript.

Question 2

Is this Data URI converter free?

Accepted Answer

Yes, completely free with unlimited conversions. No signup required, no watermarks. All conversion happens in your browser for complete privacy of files and embedded resources.

Question 3

Are files uploaded to servers?

Accepted Answer

No, all Data URI conversion happens locally in your browser. Files never leave your computer, ensuring complete privacy for images, assets, and proprietary resources.

Question 4

What is a Data URI and when should I use it?

Accepted Answer

A Data URI embeds file content directly in a URL using the data: scheme. Use it for small files (< 10KB) to reduce HTTP requests, create self-contained documents, or embed resources inline.

Question 5

What's the difference between base64 and percent encoding?

Accepted Answer

Base64 is more compact for binary data and images, while percent encoding is human-readable for text. Base64 increases size by ~33%, while percent encoding varies based on special characters.

Question 6

Why does my Data URI make the file larger?

Accepted Answer

Data URIs have encoding overhead. Base64 adds ~33% size, plus MIME type headers. For small files, this is acceptable to avoid HTTP requests, but large files should use separate URLs.

Question 7

How does MIME type auto-detection work?

Accepted Answer

The tool analyzes content patterns: JSON structure, HTML/XML tags, CSS syntax, JavaScript keywords, and binary signatures for images. Manual override is available for accuracy.

Question 8

Are there size limits for Data URIs?

Accepted Answer

Browsers typically support 2-32MB Data URIs, but performance degrades significantly above 100KB. Keep Data URIs small (< 10KB) for best practices and avoid them for large media files.

Data URI Converter – Encode Files as Data URIs