Extension Preflight
Check your extension package before Google does.
Scan the ZIP you are about to upload. It finds the permission, manifest and packaging problems that reviewers look for.
Runs locally. No signup. Your code never leaves your browser.
Drop your extension ZIP here
or choose it from your computer
ZIP files only. Your file is read in this tab and never uploaded.
What gets checked
- Manifest present and valid
- Broad host permissions
- Permissions you never use
- Permissions covered elsewhere
- Content Security Policy problems
- Files missing from the ZIP
- Scripts from another server
- Obfuscated code
This reads your package only. It cannot see your store listing, your privacy policy, or whether your extension works.