100 KB ZIP sample file
A ZIP file of exactly 102,400 bytes. It is a valid ZIP archive file, generated for this site and checked with an independent parser.
Download
sample-zip-100kb.zip
100 KB102,400 bytes
Download 100 KB ZIPDirect download. No sign-up and no waiting.
- Type
- application/zip
- SHA-256
8069e904c6e4a8fd1d4c09a446de6df549087f236cd354f6b189482e771a9d25- Direct URL
https://sampletestfiles.com/downloads/zip/sample-zip-100kb.zip
What is in this file
4 entries: a README, a CSV file and a JSON file compressed with deflate, plus payload.bin, 99,144 pseudo-random bytes stored without compression so the archive is exactly 102,400 bytes.
| Entries | 4 |
|---|---|
| Compression | Deflate for text entries, stored for payload.bin |
| Encrypted | No |
| ZIP64 | No |
| Largest entry | payload.bin, 99,144 bytes |
First bytes of the file
The first 64 bytes of sample-zip-100kb.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 ff c2 |PK..........!\..|
00000010 9b 7e 6c 00 00 00 7b 00 00 00 0a 00 00 00 52 45 |.~l...{.......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 54 e5 0a 6c 88 05 09 26 36 b7 |....#.T..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 100 KB matters
A 102,400-byte file that sits exactly on the default request-body limit of Express. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| Express body parsers | 100 KB (102,400 bytes) by default | A request body of exactly this size passes; anything larger returns 413 Payload Too Large. |
| Gmail message clipping | About 102 KB of HTML | Longer messages are truncated behind a "view entire message" link. |
| Amazon DynamoDB items | 400 KB per item | 100 KB fits; the 500 KB sample does not. |
Use this file for
- Checking email size handling
- Testing bulk import features
- Testing archive uploads and extraction
Testing notes for ZIP
- Windows reports ZIP uploads as application/x-zip-compressed, so allow-lists need both MIME types.
- 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.
Technical details
| File name | sample-zip-100kb.zip |
|---|---|
| Format | ZIP (ZIP archive) |
| Extension | .zip |
| MIME type | application/zip |
| Size | 102,400 bytes (100 KB) |
| Kind | Binary |
| Signature | 50 4B 03 04 |
| SHA-256 | 8069e904c6e4a8fd1d4c09a446de6df549087f236cd354f6b189482e771a9d25 |
| 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-100kb.zip 'https://sampletestfiles.com/downloads/zip/sample-zip-100kb.zip'
sha256sum sample-zip-100kb.zip # Linux
shasum -a 256 sample-zip-100kb.zip # macOSOn Windows, run Get-FileHash sample-zip-100kb.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 100 KB?
- Yes. It is 102,400 bytes, which is 100 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 100 KB ZIP file?
- 4 entries: a README, a CSV file and a JSON file compressed with deflate, plus payload.bin, 99,144 pseudo-random bytes stored without compression so the archive is exactly 102,400 bytes.
- Are the archives encrypted?
- No. They are not encrypted or password-protected and do not use ZIP64.