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2026-09-24

Browser Storage Explained: localStorage and IndexedDB

Learn how localStorage and IndexedDB let web applications save preferences, history and structured data locally in your browser.

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How Browser Storage Works: localStorage, IndexedDB and Your Data

Modern websites can store information on your device using browser storage. Two common technologies are localStorage and IndexedDB. They serve different purposes.

What is localStorage?

localStorage provides simple key-value storage associated with a website origin. It is useful for small preferences and settings.

What is IndexedDB?

IndexedDB is a structured browser database designed for larger and more complex data. It supports records, indexes and asynchronous operations.

Is browser storage the same as cloud storage?

No. Browser storage is normally associated with a particular browser profile and device. It does not automatically sync to the provider's servers.

Can browser storage be deleted?

Yes. Users can clear site data. Browsers can also remove storage under certain conditions. Private browsing may behave differently.

Format Convertly Workspace

Format Convertly uses localStorage for local Workspace features such as preferences, favorites, presets, history and workflows. It does not currently store Workspace data in IndexedDB. Source conversion files are not saved into Workspace storage.

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