1 MB MP4 sample file
An MP4 file of exactly 1,048,576 bytes. It is a valid MPEG-4 Part 14 video file, generated for this site and checked with an independent parser.
Download
sample-mp4-1mb.mp4
1 MB1,048,576 bytes
Download 1 MB MP4Direct download. No sign-up and no waiting.
- Type
- video/mp4
- SHA-256
24cc6a2c507ec8a5a23fd7a770a631876ef6923a0d1db0d9ee4c98a9334940c6- Direct URL
https://sampletestfiles.com/downloads/mp4/sample-mp4-1mb.mp4
What is in this file
562 frames (18.7 s) of a synthetic test pattern with a frame counter, looping every six seconds, in one H.264 video track. 1,035 bytes of a trailing "free" box bring the file to the exact size.
| Dimensions | 640 × 360 px |
|---|---|
| Duration | 18.7 s |
| Frame rate | 30 fps |
| Video codec | H.264 (AVC), Main profile |
| Audio | No audio track |
| Fast start | Yes (moov before mdat) |
First bytes of the file
The first 64 bytes of sample-mp4-1mb.mp4 as a hex dump: offset, bytes, then the same bytes as text. The MP4 signature is 66 74 79 70 at offset 4.
00000000 00 00 00 20 66 74 79 70 69 73 6f 6d 00 00 02 00 |... ftypisom....|
00000010 69 73 6f 6d 69 73 6f 32 61 76 63 31 6d 70 34 31 |isomiso2avc1mp41|
00000020 00 00 0b 8b 6d 6f 6f 76 00 00 00 6c 6d 76 68 64 |....moov...lmvhd|
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 e8 |................|Preview
Displays the file in your browser.
Where 1 MB matters
A 1,048,576-byte file: exactly the default upload limit of nginx, Spring Boot and Next.js. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| nginx | 1 MB by default (client_max_body_size) | A multipart upload of this file exceeds the limit by the size of the form boundaries. |
| Spring Boot multipart | 1 MB per file by default (max-file-size) | A file of exactly 1 MB is at the limit. |
| Next.js API routes and Server Actions | 1 MB by default | Larger bodies need the size limit raised in configuration. |
| Cloud Firestore documents | 1 MiB (1,048,576 bytes) | The same number of bytes as this file. |
| Apache Kafka messages | About 1 MB by default | Brokers reject larger records unless message.max.bytes is raised. |
Use this file for
- Download tests on mobile connections
- Verifying large-file and timeout handling
- Testing video upload, transcoding and thumbnail extraction
Testing notes for MP4
- A valid .mp4 may contain a codec the browser cannot play; container and codec are separate questions.
- Uploads are large and slow, so they expose timeout, retry and progress-reporting bugs that small files never reach.
Technical details
| File name | sample-mp4-1mb.mp4 |
|---|---|
| Format | MP4 (MPEG-4 Part 14 video) |
| Extension | .mp4 |
| MIME type | video/mp4 |
| Size | 1,048,576 bytes (1 MB) |
| Kind | Binary |
| Signature | 66 74 79 70 at offset 4 |
| SHA-256 | 24cc6a2c507ec8a5a23fd7a770a631876ef6923a0d1db0d9ee4c98a9334940c6 |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Available on this page |
| Source | Generated for this site; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Video |
Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Download from the command line and verify
Fetch the file with curl, then compare its checksum with the SHA-256 value above.
curl -o sample-mp4-1mb.mp4 'https://sampletestfiles.com/downloads/mp4/sample-mp4-1mb.mp4'
sha256sum sample-mp4-1mb.mp4 # Linux
shasum -a 256 sample-mp4-1mb.mp4 # macOSOn Windows, run Get-FileHash sample-mp4-1mb.mp4 -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.
Related files
Questions about this file
- Is this file exactly 1 MB?
- Yes. It is 1,048,576 bytes, which is 1 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 1 MB MP4 file?
- 562 frames (18.7 s) of a synthetic test pattern with a frame counter, looping every six seconds, in one H.264 video track. 1,035 bytes of a trailing "free" box bring the file to the exact size.
- Will they play in a browser before fully downloading?
- Yes. The index is at the start of the file, so playback can begin immediately.