20 MB ZIP test file
A ZIP archive of exactly 20,971,520 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 ZIP archive containing one text file, stored uncompressed so the archive is exactly the size you choose. It extracts normally.
- Size: 20,971,520 bytes = 20 MB (binary) ≈ 20.97 MB (decimal)
- MIME type:
application/zip - File name:
dummy-20mb.zip
Will a 20 MB file upload?
How a 20 MB file compares with published limits (verified 2026-09-27):
| Service | Limit | 20 MB file |
|---|---|---|
| Gmail — email attachments (total per message) | 25 MB | Fits |
| Outlook.com — email attachments | 25 MB | Fits |
| Yahoo Mail — email attachments (total per message) | 25 MB | Fits |
| WhatsApp — documents / files | 2 GB | Fits |
| Discord (free) — file attachments | 20 MB | Fits |
| 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 | Fits |
| Typeform — file upload question | 10 MB | Too big |
Sources and 40+ more limits (servers, frameworks, cloud storage): file upload limits reference.
Good for testing
- Archive upload limits
- Server-side unzip and extraction jobs
- Antivirus scanning of archives
Questions
Is this 20 MB ZIP exactly 20,971,520 bytes?
Yes. The file is exactly 20,971,520 bytes (20 MB with 1 MB = 1,024 × 1,024 bytes). If the system you test counts 1 MB as 1,000,000 bytes, use the 20,000,000-byte button instead.
Will the ZIP file open?
A valid ZIP archive containing one text file, stored uncompressed so the archive is exactly the size you choose. It extracts normally.
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: ZIP format guide.