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

Data Protocol URL Size Limitations

Introduction:
Data protocol URLs, also known as data URIs, are used to embed data directly into web pages. These URLs have become a popular alternative to external file requests, as they improve performance and reduce bandwidth utilization.

Question:
Is there a size limitation for data protocol URLs?

Answer:
The answer to this question is not straightforward as it depends on the web browser being used. Here's an overview of the size limitations for popular browsers:

• Chrome:

  • 2MB for the current document

  • In-memory storage limit for arbitrary blobs:

    • 2GB for x64 systems without ChromeOS or Android
    • Total physical memory / 5 for other systems

• Firefox:

  • Unlimited

• IE 9 and Above & Edge:

  • 4GB

• Safari and Mobile Safari:

  • Information not readily available

Alternatives:
If the data protocol URL size limitation is an issue, consider using one of the following alternatives:

• Blob URLs:

  • URL.createObjectURL() using the URL API and blobs via the File API
  • Higher limit of 500MiB in Chrome

• FileSaver.js, StreamSaver.js, and JSZip:

  • Provide additional options for handling large data transfers

Additional Considerations:

• Modernizr can detect support for data URIs over 32kb.
• The data URI spec does not define a size limit, leaving it to individual applications to impose limits.

Related Questions:

• 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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