100 MB VTT sample

A VTT file of exactly 104,857,600 bytes. It is a valid WebVTT subtitles file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 100 MB sample, test or dummy VTT file.

sample-vtt-100mb.vtt

100 MB104,857,600 bytes

Download 100 MB VTT

Created in your browser and, in browsers that can stream to disk, sent straight to your downloads list; this can take a minute. No sign-up.

Type: text/vtt
SHA-256: 186524f596f022bc632a07f9ccd1bad27f691fc51d587e0a6f1d535594147d2b
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A WEBVTT header, a note and 875,492 numbered cues, one every 137 ms and each shown for 123 ms. A final NOTE block, which players do not display, brings the file to the exact size.

Cues	875,492
Timing	HH:MM:SS.mmm
Line length	At most 42 characters
Styling	None
Encoding	UTF-8 (ASCII characters only)
Line endings	LF

How the file begins

The opening lines of sample-vtt-100mb.vtt, exactly as they appear in the file.

00000000  57 45 42 56 54 54 0a 0a  4e 4f 54 45 20 53 61 6d |WEBVTT..NOTE Sam|
00000010  70 6c 65 54 65 73 74 46  69 6c 65 73 20 73 61 6d |pleTestFiles sam|
00000020  70 6c 65 20 57 65 62 56  54 54 20 66 69 6c 65 20 |ple WebVTT file |
00000030  28 31 30 30 20 4d 42 29  0a 0a 31 0a 30 30 3a 30 |(100 MB)..1.00:0|

Preview

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

Where 100 MB matters

A 104,857,600-byte file: the request-body limit of Cloudflare's Free and Pro plans, and the size above which GitHub rejects a file outright.

All 100 MB sample files

Use this file for

Finding the first upload limit in a new stack
Testing accessibility of video players
Testing HTML video captions

Testing notes for VTT

Browsers load caption tracks under the same cross-origin rules as scripts, so a .vtt file on another domain needs CORS headers.
Servers that send WebVTT as text/plain may see tracks ignored; the correct type is text/vtt.

VTT format reference

Technical details

File name	sample-vtt-100mb.vtt
Format	VTT (WebVTT subtitles)
Extension	.vtt
MIME type	text/vtt
Size	104,857,600 bytes (100 MB)
Kind	Text
Signature	57 45 42 56 54 54
SHA-256	186524f596f022bc632a07f9ccd1bad27f691fc51d587e0a6f1d535594147d2b
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	Subtitles

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-vtt-100mb.vtt     # Linux
shasum -a 256 sample-vtt-100mb.vtt # macOS

On Windows, run Get-FileHash sample-vtt-100mb.vtt -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 100 MB?: Yes. It is 104,857,600 bytes, which is 100 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 100 MB VTT file?: A WEBVTT header, a note and 875,492 numbered cues, one every 137 ms and each shown for 123 ms. A final NOTE block, which players do not display, brings the file to the exact size.
Can I use these with the MP4 samples?: Yes. Add the file with a <track> element to check that captions appear, though the text is unrelated to the picture.

Download