Dummy XML File Generator
Every dummy XML file is well-formed XML with a dataset of item records, exact to the byte you set.
Sample XML files, ready to download:
One click, exact size (1 KB = 1,024 bytes), default options, built in your browser.
A dummy XML file is a well-formed XML document made for testing: an XML declaration, one dataset root and item records. Download one free at the exact size you need, from 128 Bytes to 50 MB, with as many items as fit. It is built for parser, import and upload tests, where the size and the structure matter more than what the records say. Working with JSON APIs instead? Use a dummy JSON file.
How we check it: every generated file must be exactly the size you set and pass a well-formedness checker; the last run on 21 October 2026 passed 155 of 155 runs across 17 formats (how the files are made and checked).
What is inside a dummy XML file
The layout is simple and always the same (how we build and check these files):
- An XML declaration (version 1.0, UTF-8) and a single root element, <dataset>, with generator and filename attributes.
- Repeated <item> elements, each with <id>, <name>, <status> and <timestamp>. Every item holds the same values (id 101, "Sample Data Record", ACTIVE and one fixed timestamp), so the file is no use for testing unique keys.
- No DTD, no schema and no namespaces. UTF-8 without a byte order mark, two-space indentation, LF line endings.
- Only whole items are written. The bytes left over become a comment (<!-- DUMMY_PADDING ... -->) or a few spaces before the closing tag.
What a dummy XML file is used for
Parser memory
Compare DOM and streaming parsers on a 1 MB and a 50 MB file and see which one your code really uses.
Legacy integrations
SOAP services, EDI bridges and older import endpoints often have tight size limits. Find them before a partner does.
Import jobs
Check that batch imports cope with thousands of records, report progress and finish inside their timeout.
Upload validation
Confirm your handler accepts XML sent as application/xml or text/xml, and rejects files that only claim to be XML.
DOM or streaming: what a large XML file tells you
Load a 50 MB dummy XML file with a DOM parser and memory use climbs well past 50 MB, because every element becomes an object. A streaming parser (SAX, StAX, XmlReader or iterparse) stays roughly flat. Run 1 MB and 50 MB files through your code and compare memory: the difference tells you which kind of parser you have.
XML upload and request limits
Make three files around the limit with the unit set to Bytes: one byte under, exactly at it and one byte over. XML compresses very well, and this file repeats one record, so if a client or proxy compresses the request, the bytes on the wire are far fewer than the file size. Measure the limit on the server, against the decoded body.
| Limit | Size | Notes |
|---|---|---|
| nginx client_max_body_size (default) | 1 MB 1,048,576 B | Requests with a larger body get HTTP 413. |
| PHP upload_max_filesize (default) | 2 MB 2,097,152 B | Also capped by post_max_size, so raise both. |
| AWS Lambda synchronous invocation payload | 6 MB 6,291,456 B | Applies to request and response. |
| Amazon API Gateway REST API payload | 10 MB 10,485,760 B | Hard quota for REST APIs. |
| Outlook default attachment limit (Exchange accounts) | 10 MB 10,485,760 B | Administrators can change it. |
| Outlook attachment limit (internet accounts) | 20 MB 20,971,520 B | Per Microsoft Outlook guidance. |
| Gmail message size limit | 25 MB 26,214,400 B | Attachments grow about a third when encoded, so a 20 MB file can already be too big. |
XML file details
- Extension
- XML .xml
- MIME type
- application/xml
- Smallest size
- 128 Bytes
- Largest size
- 50 MB
- Contents
- Well-formed XML dataset of repeated item elements; leftover bytes become a comment or whitespace
Dummy XML file FAQ
Is the dummy XML file well-formed?
Yes. It starts with an XML declaration, has a single root element called dataset and parses with a standard XML parser. It is UTF-8 without a byte order mark.
What does each item contain?
An id, a name, a status and a timestamp. Every item has the same values, so use the file for size and parser tests, not for testing unique ids.
Does the XML use a schema or namespaces?
No. There is no DTD, no XSD reference and no namespace, so any XML parser can read it without extra setup.
How is the exact file size reached?
Whole items fill the file, and the bytes left over become a comment or whitespace before the closing tag. Both are allowed there, so the file stays well-formed.
How large can a dummy XML file be?
From 128 Bytes up to 50 MB.
Is my file uploaded?
No. The XML is built in your browser and never sent to a server.