All combinations

ZIP + Video Polyglot

Merge a ZIP archive with an MP4 video file

ZIPVideo

01 · Add your files

0/2 added
01ZIP File
.zip · 100MB
02Video File
.mp4 · 100MB

02 · Generate

Please upload both files to generate your polyglot file

Limits · ZIP 100MB · Video 100MB

How to open your polyglot file
  • To access different file types, simply rename the file extension (e.g. .zip, .mp4, .jpg, etc.).
  • If your computer can't open .zip files, try using the command line: unzip filename.zip
  • .mp4 files may not play in some video players, but work fine with popular ones like VLC or QuickTime Player.
  • These files are polyglots and may behave differently depending on the software used to open them.
File size limits
  • PDF50MB
  • Image25MB
  • Video100MB
  • ZIP100MB
  • HTML1MB

Highlighted formats apply to this combination. Limits are enforced in your browser, so an oversized file never leaves your machine.

Usage terms
  • Use it only for educational, research, or testing purposes.
  • Not use the output for malicious purposes, phishing, or exploiting vulnerabilities.
  • Take full responsibility for any consequences of using the generated files.

What is a ZIP + Video polyglot?

A ZIP + Video polyglot plays as a normal video and extracts as a normal archive. Media players stream it; archive tools unpack it.

How the formats coexist

The MP4 atom structure is read from the front and skips unknown atoms, while the ZIP central directory is found by scanning from the end. Neither reader is disturbed by the other's data.

Why people build these

  • Shipping a video with its project files, subtitles or assets attached to the same file
  • Testing whether media-upload validation inspects beyond the container header
  • CTF challenges built around media file internals

Files are processed in memory and never stored. Generated polyglots are intended for educational, research and testing use. See privacy and terms.