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Convert XML to JSON Online

Convert XML documents to JSON with strict XXE protection and Billion Laughs defense in your browser.

Runs in browser

Drop your .xml file here

Up to 10 MiB. Converted privately in your browser.

Choose Files
Max 10 MB per file•Up to 1 files
100% Private — Processed locally in your browser

How to use Convert XML to JSON Online

  1. 1

    Select or drop your XML file, or paste XML text.

  2. 2

    Our security engine verifies that no external entities or expansion bombs exist.

  3. 3

    Inspect the converted JSON and download or copy the result.

Hardened, secure XML to JSON conversion

Parses XML documents into JSON objects while strictly blocking XML External Entity (XXE) attacks, external DTD fetching, and recursive entity expansion bombs.

What to expect and limitations

Maximum file size: 10 MiB. External entity references (SYSTEM, PUBLIC, remote DTDs) are strictly blocked for security. Malformed XML tags will trigger an error.

Private browser processing

Your data is parsed, validated, and converted entirely in your web browser. File content is never transmitted over the internet to FileNimble servers. All calculations run in your local browser memory. Clearing the tool or leaving the page releases application references; this is not a guarantee of secure memory erasure. Saved downloads remain on your device.

Formula injection prevention is applied by default when generating CSV output to help protect against remote command execution and exfiltration attacks when opening files in spreadsheet applications such as Microsoft Excel and Google Sheets.

Frequently Asked Questions

How does FileNimble protect against XXE attacks?

Our parser disables all external entity resolution and actively inspects documents to reject any <!DOCTYPE or <!ENTITY declarations referencing external resources.

Are XML attributes preserved?

Yes. Attributes are parsed and stored with the standard @_ prefix in the JSON structure.

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