500 KB SRT sample

An SRT file of exactly 512,000 bytes. It is a valid SubRip 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 500 KB sample, test or dummy SRT file.

sample-srt-500kb.srt

500 KB512,000 bytes

Download 500 KB SRT

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/x-subrip
SHA-256: a8ca1b282fbbc2573cb6ae23d9ab2f5f66f3577288906b15c6d62cdb3aea4a94
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

4,355 numbered subtitle cues, one per second and each shown for 0.9 s, with up to three lines of text of at most 42 characters. The last cue repeats "End of sample" lines to bring the file to the exact size.

Cues	4,355
Timing	HH:MM:SS,mmm
Line length	At most 42 characters
Formatting tags	None
Encoding	UTF-8 (ASCII characters only)
Line endings	LF

How the file begins

The opening lines of sample-srt-500kb.srt, exactly as they appear in the file.

00000000  31 0a 30 30 3a 30 30 3a  30 30 2c 30 30 30 20 2d |1.00:00:00,000 -|
00000010  2d 3e 20 30 30 3a 30 30  3a 30 30 2c 39 30 30 0a |-> 00:00:00,900.|
00000020  45 76 65 72 79 20 6c 69  6e 65 20 69 6e 20 74 68 |Every line in th|
00000030  69 73 20 64 6f 63 75 6d  65 6e 74 20 77 61 73 20 |is document was |

Preview

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

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
Testing caption editors and timing tools
Testing subtitle upload and display

Testing notes for SRT

Files saved in a legacy encoding show garbled accents; importers should detect or require UTF-8.
SRT uses a comma before the milliseconds and WebVTT uses a full stop. Mixing them up is the usual reason a converted file fails.

SRT format reference

Technical details

File name	sample-srt-500kb.srt
Format	SRT (SubRip subtitles)
Extension	.srt
MIME type	application/x-subrip
Size	512,000 bytes (500 KB)
Kind	Text
SHA-256	a8ca1b282fbbc2573cb6ae23d9ab2f5f66f3577288906b15c6d62cdb3aea4a94
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-srt-500kb.srt     # Linux
shasum -a 256 sample-srt-500kb.srt # macOS

On Windows, run Get-FileHash sample-srt-500kb.srt -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 SRT file?: 4,355 numbered subtitle cues, one per second and each shown for 0.9 s, with up to three lines of text of at most 42 characters. The last cue repeats "End of sample" lines to bring the file to the exact size.
How long are the cues?: Each cue lasts three seconds and a new cue starts every four seconds.

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