Dummy PowerPoint File Generator (PPTX)
Every dummy PowerPoint file is a .pptx with the number of slides you choose, each with a title and text, exact to the byte.
Sample PPTX files, ready to download:
One click, exact size (1 KB = 1,024 bytes), default options, built in your browser.
A dummy PowerPoint file is a .pptx presentation made for testing, with real slides you can count. Download one free at the exact size you need, from 15 KB to 50 MB, with 1 to 100 slides (5 by default). Each slide has a title, such as "Dummy slide 3 of 5", and three lines of placeholder text. Use it to test upload forms, slide previews and document converters. For a text document, use a dummy Word file.
How we check it: every generated file must be exactly the size you set and pass our own ZIP and CRC-32 checker, JSZip, Info-ZIP unzip -t and 7-Zip, plus the required OpenXML parts, and PresentationML checks: every part well-formed, every relationship target present, the slide count and every slide title; the last run on 13 November 2026 passed 223 of 223 runs across 22 formats (how the files are made and checked).
What is inside a dummy PowerPoint file
A complete PresentationML package (how we build and check these files):
- Exactly the number of slides you choose in Options, from 1 to 100, in 16:9 widescreen.
- On every slide, a title text box ("Dummy slide N of M") and a body text box with three lines of placeholder text.
- A slide master, a blank layout, a theme with colours and fonts, and the presentation, view and table-style parts PowerPoint expects.
- A stored padding.dat part that carries the extra size, declared in [Content_Types].xml. No macros, images, notes or embedded objects.
What a dummy PowerPoint file is used for
Presentation uploads
Learning platforms, CRMs and shared drives take .pptx files. Test their size limits with a presentation that has real slides.
Slide previews
Check that a preview or thumbnail service counts the slides correctly: the titles say which slide is which.
Document conversion
Convert to PDF or images and compare the page count with the slide count you set.
Type checks
Make sure your handler accepts a real .pptx and rejects a ZIP or a Word file renamed to .pptx.
How to check a PPTX upload
A .pptx is a ZIP archive of XML parts, so it starts with PK like a dummy ZIP file and a signature check alone cannot tell them apart. Open the archive and look for ppt/presentation.xml to be sure it is a presentation.
Slide count is a good second check. This file has exactly the slides you set, listed in ppt/presentation.xml, so a converter that outputs a different number of pages has a bug worth reporting.
| 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. |
PowerPoint file details
- Extension
- PPTX .pptx
- MIME type
- application/vnd.openxmlformats-officedocument.presentationml.presentation
- Smallest size
- 15 KB
- Largest size
- 50 MB
- Contents
- PowerPoint with real 16:9 slides (5 by default, 1 to 100), each with a title and three lines of text; extra size is a stored padding part
Microsoft PowerPoint is a trademark of the Microsoft group of companies.
Dummy PowerPoint file FAQ
Will the dummy PowerPoint file open in PowerPoint?
It is built to: it has the slide master, layout, theme and slide parts PowerPoint needs, and passes our package checks. We have not opened every size in PowerPoint, so try it in your version first.
How many slides does it have?
5 by default. Set the Number of slides option to anything from 1 to 100. The file is still exactly the size you set; extra bytes go into a padding part.
Is this a PowerPoint example or template?
No. It is a plain test file: white 16:9 slides with a title and placeholder text. For design examples, start from the templates in PowerPoint itself.
What is the smallest dummy PowerPoint file?
About 15 KB for one slide and 25 KB for the default five, because every part is stored uncompressed. If the size is too small for the slides, the tool says the minimum.
Is a PPTX file a ZIP file?
Yes. A .pptx is a ZIP archive of XML parts. Rename a copy to .zip and you will see ppt/slides/slide1.xml and the other parts.
How large can a dummy PowerPoint file be?
From 15 KB up to 50 MB. Everything is built in your browser and never uploaded.