1 MB TXT sample file
A TXT file of exactly 1,048,576 bytes. It is a valid Plain text file, generated for this site and checked with an independent parser.
Download
sample-txt-1mb.txt
1 MB1,048,576 bytes
Download 1 MB TXTDirect download. No sign-up and no waiting.
- Type
- text/plain
- SHA-256
2faee935f658705c86871d59a47d9e840524d817116bf40285268bcf72773671- Direct URL
https://sampletestfiles.com/downloads/txt/sample-txt-1mb.txt
What is in this file
10,547 numbered lines of plain English text, each prefixed with its line number and starting byte offset so truncation is easy to spot. A closing rule of "=" characters brings the file to the exact size.
| Numbered lines | 10,547 |
|---|---|
| Encoding | UTF-8 (ASCII characters only) |
| Line endings | LF (Unix) |
How the file begins
The opening lines of sample-txt-1mb.txt, exactly as they appear in the file.
SampleTestFiles sample text file (1 MB)
Encoding: ASCII, which is also valid UTF-8. Line endings: LF.
Each numbered line starts with its line number and the byte offset at which it begins.
0000001 000000190 This sample file exists so that software can be tested with realistic input.
0000002 000000285 Every line in this document was generated by a script and describes nothing confidential.
0000003 000000393 Use it to check that uploads, downloads and parsers behave the way you expect.
0000004 000000490 The file was built to an exact byte count, which makes size limits easy to verify.
0000005 000000591 If the last line of this file is missing, the transfer was cut short.
0000006 000000679 A good test fixture is boring, predictable and identical every time it is downloaded.
0000007 000000783 Compare the checksum published on the download page with the one you compute locally.Preview
Shows the first 64 KB of the file.
Where 1 MB matters
A 1,048,576-byte file: exactly the default upload limit of nginx, Spring Boot and Next.js. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| nginx | 1 MB by default (client_max_body_size) | A multipart upload of this file exceeds the limit by the size of the form boundaries. |
| Spring Boot multipart | 1 MB per file by default (max-file-size) | A file of exactly 1 MB is at the limit. |
| Next.js API routes and Server Actions | 1 MB by default | Larger bodies need the size limit raised in configuration. |
| Cloud Firestore documents | 1 MiB (1,048,576 bytes) | The same number of bytes as this file. |
| Apache Kafka messages | About 1 MB by default | Brokers reject larger records unless message.max.bytes is raised. |
Use this file for
- Download tests on mobile connections
- Measuring transfer speed with compressible content
- Baseline upload and download tests
Testing notes for TXT
- Line endings change the byte count: converting LF to CRLF adds one byte per line, which breaks checksum comparisons.
- An empty or whitespace-only file is still a valid text file and is worth a test of its own.
Technical details
| File name | sample-txt-1mb.txt |
|---|---|
| Format | TXT (Plain text) |
| Extension | .txt |
| MIME type | text/plain |
| Size | 1,048,576 bytes (1 MB) |
| Kind | Text |
| SHA-256 | 2faee935f658705c86871d59a47d9e840524d817116bf40285268bcf72773671 |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Available on this page |
| Source | Generated for this site; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Documents |
Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Download from the command line and verify
Fetch the file with curl, then compare its checksum with the SHA-256 value above.
curl -o sample-txt-1mb.txt 'https://sampletestfiles.com/downloads/txt/sample-txt-1mb.txt'
sha256sum sample-txt-1mb.txt # Linux
shasum -a 256 sample-txt-1mb.txt # macOSOn Windows, run Get-FileHash sample-txt-1mb.txt -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.
Related files
Questions about this file
- Is this file exactly 1 MB?
- Yes. It is 1,048,576 bytes, which is 1 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 1 MB TXT file?
- 10,547 numbered lines of plain English text, each prefixed with its line number and starting byte offset so truncation is easy to spot. A closing rule of "=" characters brings the file to the exact size.
- Which encoding do the text samples use?
- The sized samples use only ASCII characters, which makes them valid UTF-8, ASCII and Latin-1 at once. A separate multilingual sample covers non-ASCII text.