15 MB GIF sample

A GIF file of exactly 15,728,640 bytes. It is a valid Graphics Interchange 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 15 MB sample, test or dummy GIF file.

sample-gif-15mb.gif

15 MB15,728,640 bytes

Download 15 MB GIF

Created in your browser in a few seconds, then checked against the SHA-256 checksum. No sign-up.

Type: image/gif
SHA-256: 237ddc3edaa132839e23a22665e625503914be434bb0467dbc8f4319fb5ec1ee
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A looping 480 × 360 animation of 178 LZW-compressed frames; the last frame repaints only the top of the canvas. 174 bytes of GIF comment extension bring the file to the exact size.

Dimensions	480 × 360 px
Frames	178
Frame delay	80 ms
Loop	Forever
Colours	256 (global colour table)
Version	GIF89a

First bytes of the file

The first 64 bytes of sample-gif-15mb.gif as a hex dump: offset, bytes, then the same bytes as text. The GIF signature is 47 49 46 38 39 61.

00000000  47 49 46 38 39 61 e0 01  68 01 f7 00 00 00 00 00 |GIF89a..h.......|
00000010  00 00 33 00 00 66 00 00  99 00 00 cc 00 00 ff 00 |..3..f..........|
00000020  33 00 00 33 33 00 33 66  00 33 99 00 33 cc 00 33 |3..33.3f.3..3..3|
00000030  ff 00 66 00 00 66 33 00  66 66 00 66 99 00 66 cc |..f..f3.ff.f..f.|

Preview

Creates the file in your browser and shows it here. Nothing large is downloaded from our server.

Where 15 MB matters

A 15,728,640-byte file, 15 MB in the binary units that operating systems and upload limits use. It is useful wherever a form, an API gateway, a storage quota or a mail server is configured with a limit of about this size.

All 15 MB sample files

Use this file for

Testing image resizing and memory use
Checking frame-count and duration limits
Testing avatar and reaction uploads

Testing notes for GIF

Many resizing libraries silently keep only the first frame of an animated GIF.
Animated GIFs are large for what they show; a few seconds can reach several megabytes, so they hit size limits early.

GIF format reference

Technical details

File name	sample-gif-15mb.gif
Format	GIF (Graphics Interchange Format)
Extension	.gif
MIME type	image/gif
Size	15,728,640 bytes (15 MB)
Kind	Binary
Signature	47 49 46 38 39 61
SHA-256	237ddc3edaa132839e23a22665e625503914be434bb0467dbc8f4319fb5ec1ee
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	Images

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-gif-15mb.gif     # Linux
shasum -a 256 sample-gif-15mb.gif # macOS

On Windows, run Get-FileHash sample-gif-15mb.gif -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 15 MB?: Yes. It is 15,728,640 bytes, which is 15 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 15 MB GIF file?: A looping 480 × 360 animation of 178 LZW-compressed frames; the last frame repaints only the top of the canvas. 174 bytes of GIF comment extension bring the file to the exact size.
Are the sample GIFs animated?: Yes. They loop forever at about 12 frames per second. The frame count for each size is shown on its download page.

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