1 KB ZIP sample file
A ZIP file of exactly 1,024 bytes. It is a valid ZIP archive file, generated for this site and checked with an independent parser.
Download
- Type
- application/zip
- SHA-256
e114ebe787af50840baf696a856c414b2d6fffd7296bc0c1c54ade18b7cce38e- Direct URL
https://sampletestfiles.com/downloads/zip/sample-zip-1kb.zip
What is in this file
2 entries: a README compressed with deflate, plus payload.bin, 702 pseudo-random bytes stored without compression so the archive is exactly 1,024 bytes.
| Entries | 2 |
|---|---|
| Compression | Deflate for text entries, stored for payload.bin |
| Encrypted | No |
| ZIP64 | No |
| Largest entry | payload.bin, 702 bytes |
First bytes of the file
The first 64 bytes of sample-zip-1kb.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 64 12 |PK..........!\d.|
00000010 f4 56 6a 00 00 00 79 00 00 00 0a 00 00 00 52 45 |.Vj...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 88 05 09 26 36 b7 |....#.D..l...&6.|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 KB matters
The smallest practical test file: 1,024 bytes, small enough to travel in a single network packet. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| Ethernet | 1,500 bytes (typical MTU) | A 1 KB payload fits in one packet with its headers. |
| Browser cookies | 4,096 bytes per cookie | 1 KB is well inside the limit; the 5 KB sample is over it. |
Use this file for
- Smoke tests in CI that must run in milliseconds
- Testing archive uploads and extraction
- Checking limits on extracted size and entry count
Testing notes for ZIP
- An archive can expand to far more than its own size. Enforce limits on total extracted bytes and entry count to guard against zip bombs.
- Entry names may contain "../". Extracting without validating paths lets an archive write outside the target folder.
Technical details
| File name | sample-zip-1kb.zip |
|---|---|
| Format | ZIP (ZIP archive) |
| Extension | .zip |
| MIME type | application/zip |
| Size | 1,024 bytes (1 KB) |
| Kind | Binary |
| Signature | 50 4B 03 04 |
| SHA-256 | e114ebe787af50840baf696a856c414b2d6fffd7296bc0c1c54ade18b7cce38e |
| 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-1kb.zip 'https://sampletestfiles.com/downloads/zip/sample-zip-1kb.zip'
sha256sum sample-zip-1kb.zip # Linux
shasum -a 256 sample-zip-1kb.zip # macOSOn Windows, run Get-FileHash sample-zip-1kb.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 KB?
- Yes. It is 1,024 bytes, which is 1 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 1 KB ZIP file?
- 2 entries: a README compressed with deflate, plus payload.bin, 702 pseudo-random bytes stored without compression so the archive is exactly 1,024 bytes.
- What is inside the sample ZIP files?
- A README, a small CSV file, a small JSON file and a payload.bin entry of pseudo-random bytes that sets the archive size. The smallest archives hold fewer entries.