2026-01-27
How to Use LocalStorage Size Online (Free)
Estimate how much localStorage this origin is using — keys and approximate UTF-16 bytes. Step-by-step guide to localstorage size on FileToolsHub — free, no install.
LocalStorage Size is a free online browser tool on FileToolsHub. Estimate how much localStorage this origin is using — keys and approximate UTF-16 bytes.
Open the live tool at /tool/localstorage-size when you are ready to start. Typical flow: Open the page. Review key count and size estimate. Refresh after clearing site data.
Why people use it: Origin-only estimate; No upload; Quick diagnostics. This tool is designed to run in your browser when possible, so your input stays on your device for private one-off jobs.
Need a follow-up step? Browse more browser tools at /browser, or jump back to the tool page for FAQs, tips, and related utilities linked on FileToolsHub.