1 MB ZIP sample file
A ZIP file of exactly 1,048,576 bytes. It is a valid ZIP archive file, generated for this site and checked with an independent parser.
Download
sample-zip-1mb.zip
1 MB1,048,576 bytes
Download 1 MB ZIPDirect download. No sign-up and no waiting.
- Type
- application/zip
- SHA-256
faa1e88463da5a2b5f9e0b281c81c409160ed54829f2664f029ffd69119f7b29- Direct URL
https://sampletestfiles.com/downloads/zip/sample-zip-1mb.zip
What is in this file
4 entries: a README, a CSV file and a JSON file compressed with deflate, plus payload.bin, 1,045,323 pseudo-random bytes stored without compression so the archive is exactly 1,048,576 bytes.
| Entries | 4 |
|---|---|
| Compression | Deflate for text entries, stored for payload.bin |
| Encrypted | No |
| ZIP64 | No |
| Largest entry | payload.bin, 1,045,323 bytes |
First bytes of the file
The first 64 bytes of sample-zip-1mb.zip as a hex dump: offset, bytes, then the same bytes as text. The ZIP signature is 50 4B 03 04.
00000000 50 4b 03 04 14 00 00 00 08 00 00 00 21 5c 2b 1c |PK..........!\+.|
00000010 39 04 6b 00 00 00 79 00 00 00 0a 00 00 00 52 45 |9.k...y.......RE|
00000020 41 44 4d 45 2e 74 78 74 05 c1 31 0e c2 30 0c 05 |ADME.txt..1..0..|
00000030 d0 bd a7 f8 23 0c 44 e2 0a 6c 0c 48 48 30 b1 b9 |....#.D..l.HH0..|Preview
ZIP files cannot be shown in a browser. Download the file and open it with Windows Explorer, macOS Archive Utility, 7-Zip.
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
- Checking limits on extracted size and entry count
- Testing bulk import features
Testing notes for ZIP
- Entry names may contain "../". Extracting without validating paths lets an archive write outside the target folder.
- Windows reports ZIP uploads as application/x-zip-compressed, so allow-lists need both MIME types.
Technical details
| File name | sample-zip-1mb.zip |
|---|---|
| Format | ZIP (ZIP archive) |
| Extension | .zip |
| MIME type | application/zip |
| Size | 1,048,576 bytes (1 MB) |
| Kind | Binary |
| Signature | 50 4B 03 04 |
| SHA-256 | faa1e88463da5a2b5f9e0b281c81c409160ed54829f2664f029ffd69119f7b29 |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Not available for this format; details only |
| Source | Generated for this site; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Archives |
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-zip-1mb.zip 'https://sampletestfiles.com/downloads/zip/sample-zip-1mb.zip'
sha256sum sample-zip-1mb.zip # Linux
shasum -a 256 sample-zip-1mb.zip # macOSOn Windows, run Get-FileHash sample-zip-1mb.zip -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 ZIP file?
- 4 entries: a README, a CSV file and a JSON file compressed with deflate, plus payload.bin, 1,045,323 pseudo-random bytes stored without compression so the archive is exactly 1,048,576 bytes.
- Are the archives encrypted?
- No. They are not encrypted or password-protected and do not use ZIP64.