Find your way around

The filesystem, its benefits, and available tools.

The storage problem and the choices behind the library.

Community and commercial terms.

Latest release notes for every package.

Choose an example to try in your browser.

Files, a shell, previews, and workspace transfers.

Inspect and edit real browser volumes.

Postgres queries with persistent storage.

Experimental analytical SQL with a custom engine.

Experimental JavaScript with saved files.

A local model that works with workspace files.

Managed OPFS VFS volumes with live reads and synchronized saves.

Measurements with settings and raw samples.

Run SQL workloads across storage backends.

Measure file operations and buffer modes.

Download a repeatable collection from your device.

Workloads, timing boundaries, and limitations.

Choose backends, buffer modes, and save policies.

Set up OPFS VFS, work with files, and connect databases, shells, and developer tools.

Understand named volumes, file storage, and the difference between closing a file and closing a volume.

Use scoped OPFS VFS volumes, Effect FileSystem layers, and change streams in a browser application.

Install OPFS VFS, create a volume in a worker, then write, sync and reopen files with TypeScript. Covers setup for the Origin Private File System.

Serve your app in a secure context with the isolation headers required by the worker APIs.

Inspect browser volumes with file previews, an editor, a shell, and ZIP import and export.

Add custom file previews and reuse the shared React renderers and text editor.

Create, read, write, and remove files and directories through the worker client.

Choose save points, understand recovery, and switch buffer modes without discarding recoverable changes.

Set up the experimental DuckDB adapter with a compatible custom DuckDB-Wasm engine.

Set up experimental EdgeJS file access with a compatible custom Wasmer host.

Connect a just-bash shell to an OPFS VFS volume and manage its workspace and limits.

Store a PGlite Postgres database in OPFS VFS. Configure synchronization and worker lifecycle for a persistent in-browser database.

Add file subscriptions or premium encryption to OPFS VFS, and see the planned cloud sync plugin.

Create and reopen encrypted OPFS VFS volumes with the premium encryption plugin, custom workers, and optional passkeys.

Watch OPFS VFS file changes with the subscriptions plugin, optional completed-file content, and explicit recovery when delivery stops.

Manage browser-local OPFS VFS volumes with React providers, live reads, and generation-safe commands.

Public React SDK props, hooks, results, ownership, and rendering boundaries.

Find public imports, volume options, and APIs for inspecting and deleting volumes.

Resolve worker, ownership, quota, and recovery errors while preserving saved data.