Download 1 GB text file for testing
Use the plain text for transfer and text-reader size checks. The preset is 1 GiB (1,073,741,824 bytes); choose GB for decimal gigabytes.
1 MB = 1,000,000 B · 1 MiB = 1,048,576 B
Advanced: test an upload limit
Enter the byte limit above, then choose one byte below, the exact limit or one byte above. Each choice uses the same base: 1,073,741,824 B. Generate and download each file to test your endpoint.
Where a 1 GB TXT comes up
- Testing log ingestion and line-by-line readers with a gigabyte of text.
- Checking that a file share or chat tool enforces its 1 GB limit.
- Measuring throughput: at 100 Mbit/s the transfer takes about 86 seconds.
Limits it lands on
- Slack's per-file upload limit is 1 GB, so this file is the boundary case there.
- It fits on FAT32 drives (maximum file size just under 4 GB).
What is inside the file
Two header lines ("ByteRivet sample text file." and a note about the exact size) followed by printable ASCII filler.
Generating it needs about 1 GB of free memory in the browser tab.
Other TXT sizes
Questions
Can Notepad open it?
Large text files are slow in many editors. Use a pager or a streaming reader for tests.
Is it UTF-8?
Yes; it only contains ASCII characters, which are valid UTF-8.
Reference and checks
Noticed an issue with this test file? Report an issue →