Prepare your submission ZIP.

Add files, fix the package, download it. Originals stay untouched.

Local processing · No account

Files to pack

Drop files here, or choose from your device

Up to 300 files / 20 MiB. Folder imports omit the outer folder.

Your package is empty. Add the files you plan to submit.

What this prototype checks

Exact required paths, duplicate names, unsafe paths, basic PDF/PNG/JPEG signatures, and the final ZIP size. It excludes common OS metadata and .git folders by default; you control inclusion. It does not grade work, convert formats, or submit to your course portal.

Files remain in this tab and are cleared on refresh. Text previews are plain text. No analytics, storage, or file uploads.

ZIP: fflate (MIT) · Research & prior art