Cookie & Storage Support Checker

Check which storage APIs your browser supports: cookies, localStorage, sessionStorage, IndexedDB.

Embed this tool on your site

<iframe src="https://abracalc.com/device/storage-checker/embed.html" width="360" height="340" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Open this page — it runs instantly in your browser, no signup or install.
Allow any permission prompt if asked; everything stays on your device.
Use the on-screen controls — results update live.

Check which storage APIs your browser supports: cookies, localStorage, sessionStorage, IndexedDB.

Frequently asked questions

Why is localStorage blocked?: Browsers block localStorage in third-party iframes and when the user has set 'Block all cookies'. Private/incognito mode may also restrict it.
What is the storage quota?: localStorage is typically limited to 5-10 MB per origin. IndexedDB can store much larger amounts, up to a percentage of available disk space.