10 MB ZIP sample file

A ZIP file of exactly 10,485,760 bytes. It is a valid ZIP archive file, generated for this site and checked with an independent parser.

sample-zip-10mb.zip

10 MB10,485,760 bytes

Download 10 MB ZIP

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Type: application/zip
SHA-256: 7cb5b62fa1019fcab569c3a4c8e1e6bf0215fbc5601f170286563fa797973d29
Direct URL: https://sampletestfiles.com/downloads/zip/sample-zip-10mb.zip

What is in this file

4 entries: a README, a CSV file and a JSON file compressed with deflate, plus payload.bin, 10,482,506 pseudo-random bytes stored without compression so the archive is exactly 10,485,760 bytes.

Entries	4
Compression	Deflate for text entries, stored for payload.bin
Encrypted	No
ZIP64	No
Largest entry	payload.bin, 10,482,506 bytes

First bytes of the file

The first 64 bytes of sample-zip-10mb.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 5e 41  |PK..........!\^A|
00000010  31 0c 6b 00 00 00 7a 00 00 00 0a 00 00 00 52 45  |1.k...z.......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 70 05 36 06 24 24 98 d8 dc  |....#.Dp.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 10 MB matters

A 10,485,760-byte file: over the default limits of PHP, API Gateway and Spring Boot requests. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Amazon API Gateway	10 MB payload	A 10 MB file in a multipart or base64 body is over the limit.
Spring Boot multipart	10 MB per request by default (max-request-size)	Exceeded once form overhead is added.
PHP	8 MB POST body by default (post_max_size)	Rejected before the script runs.
Amazon S3 multipart upload	5 MiB minimum part size	This file splits into exactly two minimum-sized parts.
Email attachments	Commonly 20 to 25 MB per message	10 MB fits, at about 13.3 MB once encoded.

All 10 MB sample files

Use this file for

Exercising chunked and resumable uploads
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.

ZIP format reference

Technical details

File name	sample-zip-10mb.zip
Format	ZIP (ZIP archive)
Extension	.zip
MIME type	application/zip
Size	10,485,760 bytes (10 MB)
Kind	Binary
Signature	50 4B 03 04
SHA-256	7cb5b62fa1019fcab569c3a4c8e1e6bf0215fbc5601f170286563fa797973d29
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-10mb.zip 'https://sampletestfiles.com/downloads/zip/sample-zip-10mb.zip'
sha256sum sample-zip-10mb.zip     # Linux
shasum -a 256 sample-zip-10mb.zip # macOS

On Windows, run Get-FileHash sample-zip-10mb.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 10 MB?: Yes. It is 10,485,760 bytes, which is 10 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 10 MB ZIP file?: 4 entries: a README, a CSV file and a JSON file compressed with deflate, plus payload.bin, 10,482,506 pseudo-random bytes stored without compression so the archive is exactly 10,485,760 bytes.
Are the archives encrypted?: No. They are not encrypted or password-protected and do not use ZIP64.

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