What are the Size Limits of Data Protocol URLs in Different Browsers?

Data Protocol URL Size Limitations

While the data protocol specification itself does not outline size restrictions, individual applications may impose limitations. Here's a breakdown of size limits across popular web browsers:

Chrome: The limit varies depending on the document size. For documents under 2MB, the limit is the in-memory storage limit for arbitrary blobs. This limit is 2GB on 64-bit systems that are not running ChromeOS or Android. For all other cases, the limit is calculated as total_physical_memory / 5.

Firefox: Firefox offers unlimited support for data: URLs.

Internet Explorer 9 and Edge: These browsers have a 4GB limit for data: URLs.

Safari and Mobile Safari: The size limit for data: URLs in these browsers is currently unknown.

Alternatives to Data: URLs:

For cases where the size limits of data: URLs are insufficient, consider these alternatives:

• Blob URLs: Using the URL.createObjectURL() method with blobs obtained through the File API can support limits of up to 500MiB in Chrome.
• Additional Libraries: FileSaver.js, StreamSaver.js, and JSZip provide options for handling larger data transfers.
• Modernizr Detection: Modernizr enables detection of data URI support exceeding 32kb.

Related Questions:

Refer to the following questions for additional insights and discussions on related topics:

• getting max Data-Uri size in Javascript
• “Aw, Snap” when data uri is too large
• What is the size limit of a Base64 DataURL image?
• What is the maximum length of a URL in different browsers?
• Is it possible to programmatically detect size limit for data url?

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