500 KB ODT sample

An ODT file of exactly 512,000 bytes. It is a valid OpenDocument Text file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 500 KB sample, test or dummy ODT file.

sample-odt-500kb.odt

500 KB512,000 bytes

Download 500 KB ODT

Created in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.

Type: application/vnd.oasis.opendocument.text
SHA-256: ca2ec66651e3921c3f6517f1ef02fe488658451d7a2506155f8dc072405caf79
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

An OpenDocument text document with a title, one embedded test-card PNG and 15,368 sections of headings, paragraphs and lists. Text in the document description (meta.xml) brings the file to the exact size.

Sections	15,368
Images	1 PNG, 239 × 178 px
ODF version	1.3
Macros	None
Container	ZIP (OpenDocument package)

First bytes of the file

The first 64 bytes of sample-odt-500kb.odt as a hex dump: offset, bytes, then the same bytes as text. The ODT signature is 50 4B 03 04.

00000000  50 4b 03 04 0a 00 00 00  00 00 00 00 21 5c 5e c6 |PK..........!\^.|
00000010  32 0c 27 00 00 00 27 00  00 00 08 00 00 00 6d 69 |2.'...'.......mi|
00000020  6d 65 74 79 70 65 61 70  70 6c 69 63 61 74 69 6f |metypeapplicatio|
00000030  6e 2f 76 6e 64 2e 6f 61  73 69 73 2e 6f 70 65 6e |n/vnd.oasis.open|

Preview

ODT files cannot be shown in a browser. Download the file and open it in an application that reads ODT, such as LibreOffice Writer and Apache OpenOffice.

Where 500 KB matters

A 512,000-byte file: larger than most API body limits, smaller than most upload limits. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Amazon DynamoDB items	400 KB per item	500 KB cannot be stored as a single item.
Express body parsers	100 KB by default	Rejected unless the limit is raised.
nginx request body	1 MB by default (client_max_body_size)	Accepted with room to spare.

All 500 KB sample files

Use this file for

Checking email size handling
Checking conversion between ODT, DOCX and PDF
Verifying MIME detection of ZIP-based formats

Testing notes for ODT

Layout rarely survives a round trip through Word unchanged: fonts, numbering and tables are the usual casualties.
Reading the type from the mimetype entry only works if that entry comes first and is not compressed. Tools that re-zip a document tend to break both rules, and strict readers then reject the file.

ODT format reference

Technical details

File name	sample-odt-500kb.odt
Format	ODT (OpenDocument Text)
Extension	.odt
MIME type	application/vnd.oasis.opendocument.text
Size	512,000 bytes (500 KB)
Kind	Binary
Signature	50 4B 03 04
SHA-256	ca2ec66651e3921c3f6517f1ef02fe488658451d7a2506155f8dc072405caf79
Created	2026-10-23
Validation	See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility.
Preview	Not available for this file; details only
Source	Generated in your browser by this site's generator; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	Documents

Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked

Verify your copy

This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.

sha256sum sample-odt-500kb.odt     # Linux
shasum -a 256 sample-odt-500kb.odt # macOS

On Windows, run Get-FileHash sample-odt-500kb.odt -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.

Related files

Questions about this file

Is this file exactly 500 KB?: Yes. It is 512,000 bytes, which is 500 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 500 KB ODT file?: An OpenDocument text document with a title, one embedded test-card PNG and 15,368 sections of headings, paragraphs and lists. Text in the document description (meta.xml) brings the file to the exact size.
What gives each ODT sample its exact size?: One embedded PNG image that is stored in the package without compression. Its pixel dimensions are chosen so that the whole document comes to the stated byte count.

Download