1 MB TXT test file
A text file of exactly 1,048,576 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
Plain UTF-8 text padded with spaces to the exact size.
- Size: 1,048,576 bytes = 1 MB (binary) ≈ 1.05 MB (decimal)
- MIME type:
text/plain - File name:
dummy-1mb.txt
Will a 1 MB file upload?
How a 1 MB file compares with published limits (verified 2026-09-27):
| Service | Limit | 1 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 | Fits |
| Trello (Free) — card attachment from computer | 10 MB | Fits |
| X (Twitter) — image | 5 MB | Fits |
| LinkedIn — document post (pdf, docx, pptx) | 100 MB | Fits |
| Shopify — product image | 20 MB | Fits |
| Typeform — file upload question | 10 MB | Fits |
Sources and 40+ more limits (servers, frameworks, cloud storage): file upload limits reference.
Good for testing
- Generic file-upload limits
- Log and text ingestion
- Encoding and line-ending checks
Questions
Is this 1 MB TXT exactly 1,048,576 bytes?
Yes. The file is exactly 1,048,576 bytes (1 MB with 1 MB = 1,024 × 1,024 bytes). If the system you test counts 1 MB as 1,000,000 bytes, use the 1,000,000-byte button instead.
Will the TXT file open?
Plain UTF-8 text padded with spaces to the exact size.
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: TXT format guide.