100 MB PNG test file
A PNG image of exactly 104,857,600 bytes, created instantly in your browser. Nothing is uploaded, and there is no sign-up.
Testing a limit? Grab the edge cases too
Need another size or name? Open it in the generator.
What’s inside the file
A valid 1×1 pixel PNG followed by padding after the image data, which decoders ignore.
- Size: 104,857,600 bytes = 100 MB (binary) ≈ 104.86 MB (decimal)
- MIME type:
image/png - File name:
dummy-100mb.png
Will a 100 MB file upload?
How a 100 MB file compares with published limits (verified 2026-09-27):
| Service | Limit | 100 MB file |
|---|---|---|
| Gmail — email attachments (total per message) | 25 MB | Too big |
| Outlook.com — email attachments | 25 MB | Too big |
| Yahoo Mail — email attachments (total per message) | 25 MB | Too big |
| WhatsApp — documents / files | 2 GB | Fits |
| Discord (free) — file attachments | 20 MB | Too big |
| Slack — file upload | 1 GB | Fits |
| Facebook Messenger — files in chats | 100 MB | Fits |
| Notion (Free) — file upload | 5 MB | Too big |
| Trello (Free) — card attachment from computer | 10 MB | Too big |
| X (Twitter) — image | 5 MB | Too big |
| LinkedIn — document post (pdf, docx, pptx) | 100 MB | Fits |
| Shopify — product image | 20 MB | Too big |
| Typeform — file upload question | 10 MB | Too big |
Sources and 40+ more limits (servers, frameworks, cloud storage): file upload limits reference.
Good for testing
- Image upload validation
- Screenshot / attachment fields
- MIME-type checks for image/png
Questions
Is this 100 MB PNG exactly 104,857,600 bytes?
Yes. The file is exactly 104,857,600 bytes (100 MB with 1 MB = 1,024 × 1,024 bytes). If the system you test counts 1 MB as 1,000,000 bytes, use the 100,000,000-byte button instead.
Will the PNG file open?
A valid 1×1 pixel PNG followed by padding after the image data, which decoders ignore.
Is it safe? Where does the file come from?
The file is created by JavaScript in your own browser when you click the button. Nothing is uploaded or downloaded from a server, and the file contains no macros, scripts or personal data.
More about the format: PNG format guide.