Documents · TXT
A 100 MB TXT file, on demand.
Exactly 104,857,600 bytes of a plain UTF-8 text file, built on your machine the moment you press the button.
104,857,600 bytes, exactly.
Every byte above the 1 byte structural minimum goes into printable ASCII characters, which is why this file still behaves like one a real user would send.
Unit convention
100 MB on this page means exactly 104,857,600 bytes, using the binary (MiB) convention some systems label "MB" for short. 1 MB in the strict decimal sense is 1,000,000 bytes; 1 MiB is 1,048,576 bytes — the readout above always shows the exact count either way.
Approximate size equivalents
Roughly 58,254 pages of typed text, 109 minutes of 128 kbps audio, 10 minutes of CD-quality audio, 42 photos from a 12 MP camera. These figures compare file size only — the generated file does not contain this text, audio or image content.
Accepted by
Cloudflare Free proxy body, GitHub repository file, Slack free workspace file — all publish a limit at or above this size, based on commonly cited figures that can vary by plan and change over time.
Rejected by
Gmail attachment, Outlook.com attachment, Discord free attachment — this exceeds their commonly cited limit, which makes it a useful negative test. Published limits can vary by plan and change over time.
Other TXT sizes
Files this large exercise multipart and chunked upload paths rather than a single request, which is usually where the bugs are.
Questions.
Is this 100 MB TXT file valid?
Yes. It is a plain UTF-8 text file. The extra bytes sit in printable ASCII characters, so it opens in Notepad, TextEdit and VS Code.
Does 100 MB mean 104,857,600 bytes?
On this page, yes — 100 MB uses the binary (MiB) convention, so the file is exactly 104,857,600 bytes. 1 MB in the strict decimal sense would be a different, smaller byte count. Upload validators may use either convention, so the exact byte count is always shown to remove any ambiguity.
What is a 100 MB file used for?
Files this large exercise multipart and chunked upload paths rather than a single request, which is usually where the bugs are. For TXT specifically, the usual job is the simplest possible upload and transfer test.
Where is the file downloaded from?
Nowhere. It is assembled in a Web Worker on your own device and handed to the browser as a Blob, so nothing is uploaded, fetched or stored.