Privacy first: This tool runs in your browser. It does not upload device readings to OceanofTools.
Browser Storage and Cookie Tester tool
Run safe read-and-write checks for browser storage and cookies.
How the browser storage test works
The tool writes a uniquely named temporary value, reads it back and removes it. It does not inspect or delete unrelated cookies or saved website data. Storage quotas are estimates supplied by the browser.
Frequently Asked Questions
Will this test delete my browser data?
No. It only removes the temporary OceanofTools test key that it creates.
Why are cookies blocked in private mode?
Some private-browsing and tracking-protection modes restrict storage or remove it when the session closes.
Is the storage quota exact?
No. Browsers can dynamically change quotas based on device space and site usage.