20 MB RTF sample

An RTF file of exactly 20,971,520 bytes. It is a valid Rich Text Format file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 20 MB sample, test or dummy RTF file.

sample-rtf-20mb.rtf

20 MB20,971,520 bytes

Download 20 MB RTF

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/rtf
SHA-256: d0b3d1d2fc387cfa803721d46d75a2835c15716b56f3619164a687503dc4a914
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A Rich Text Format document with a title and 58,525 sections of bold headings and body text in Helvetica. An ignorable destination group ({\*\fixturepad}), which word processors skip, brings the file to the exact size.

Sections	58,525
Character set	ANSI, code page 1252
Fonts	Helvetica
Images	None
Encoding	UTF-8 (ASCII characters only)

How the file begins

The opening lines of sample-rtf-20mb.rtf, exactly as they appear in the file.

00000000  7b 5c 72 74 66 31 5c 61  6e 73 69 5c 61 6e 73 69 |{\rtf1\ansi\ansi|
00000010  63 70 67 31 32 35 32 5c  64 65 66 66 30 7b 5c 66 |cpg1252\deff0{\f|
00000020  6f 6e 74 74 62 6c 7b 5c  66 30 5c 66 73 77 69 73 |onttbl{\f0\fswis|
00000030  73 20 48 65 6c 76 65 74  69 63 61 3b 7d 7d 5c 66 |s Helvetica;}}\f|

Preview

Creates the file in your browser and shows the first 64 KB of it.

Where 20 MB matters

A 20,971,520-byte file: right at the default attachment limit of Outlook, and just under the 25 MB ceilings of Gmail and GitHub web uploads. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Microsoft Outlook	20 MB of attachments by default for internet mail accounts	This file is right at the limit; add a second attachment and it is exceeded.
Gmail	25 MB per message	Under the limit, although email encoding adds about a third in transit.
GitHub web uploads	25 MiB per file added through the browser	Accepted. Pushing with Git allows larger files.
Cloudflare Pages assets	25 MiB per file	The largest round size that can be served as a static asset.
Amazon API Gateway	10 MB payload	Rejected; the upload has to go directly to object storage.
ASP.NET Core (Kestrel)	About 28.6 MB request body by default	Accepted with room for the multipart overhead.

All 20 MB sample files

Use this file for

Finding the first upload limit in a new stack
Verifying upload filters that allow or block RTF
Testing legacy document import

Testing notes for RTF

Two MIME types are in use, application/rtf and text/rtf, and allow-lists should recognise both.
RTF readers must skip groups they do not understand; a parser that fails on unknown control words is not conformant.

RTF format reference

Technical details

File name	sample-rtf-20mb.rtf
Format	RTF (Rich Text Format)
Extension	.rtf
MIME type	application/rtf
Size	20,971,520 bytes (20 MB)
Kind	Text
Signature	7B 5C 72 74 66 31
SHA-256	d0b3d1d2fc387cfa803721d46d75a2835c15716b56f3619164a687503dc4a914
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	Available on this page
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-rtf-20mb.rtf     # Linux
shasum -a 256 sample-rtf-20mb.rtf # macOS

On Windows, run Get-FileHash sample-rtf-20mb.rtf -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 20 MB?: Yes. It is 20,971,520 bytes, which is 20 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 20 MB RTF file?: A Rich Text Format document with a title and 58,525 sections of bold headings and body text in Helvetica. An ignorable destination group ({\*\fixturepad}), which word processors skip, brings the file to the exact size.
Do the RTF samples contain embedded objects?: No. They contain only formatted text: bold headings and paragraphs in a single font.

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