Chrome Extension Inspector Online

Chrome extension inspector online

Short answer

A Chrome extension inspector online opens the CRX or ZIP package and presents its manifest, permissions, website access, scripts, external domains and static code findings. It is useful before installation because it reveals the extension's declared reach without granting it access to your browser.

Drop an extension package hereor choose a file from your deviceChoose a fileSupported: CRX, XPI, ZIP, manifest.json. Maximum size: 25 MB.

Processed locallyCode is never executed

Your file stays in this browser. Parsing happens in a Web Worker; the extension code is read, never executed.

What the scan checks

Permissions, host access, content scripts, background scripts, CSP, externally_connectable, web-accessible resources, JavaScript patterns, referenced domains and risk categories.

MV3MV2CRXXPIZIPJSON

Static analysis shows references and patterns. It cannot prove that network activity happened or that an extension is malicious.

Compare two versions

See permission, domain and finding changes between two packages.

Compare

What the inspector shows

The report covers identity and compatibility, required and optional permissions, host permissions, content scripts, background configuration, CSP, externally_connectable and web-accessible resources.

A findings section highlights dynamic code, remote script references, DOM injection, storage, messaging and sensitive-data indicators with file and line references.

Inspector versus browser developer tools

An online inspector reviews a package before installation. Browser developer tools can inspect an installed extension's pages and network traffic at runtime. The two approaches answer different questions: capability and configuration versus observed behavior.

Use the inspector to decide whether an extension deserves installation. Use runtime tools in a separate profile when you need to confirm network activity.

Privacy of the inspection

Files are processed locally in a Web Worker. The inspector does not need your Google account, browser profile or installed extension list. The report exists only in the page and can be exported by you.

Frequently asked questions

Can I inspect any Chrome extension online?

You can inspect any package you can lawfully obtain. Paste a Chrome Web Store URL or upload the CRX/ZIP. Some store retrieval requests may be blocked.

Does inspecting require installing the extension?

No. The inspector reads the package only and never loads it into the browser.

Is the inspector the same as Chrome's internal page?

No. Chrome's extension page shows installed extensions. This inspector analyzes a package before installation and explains permissions in plain language.

Last reviewed: October 31, 2026

Or analyze from a store URL