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The Niblet CLI is where you build apps. Use it to create a project, preview changes in your browser, check your work, and upload an app when it is ready. Editing, validation, previewing, and rendering all happen on your computer.

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Install on macOS or Linux

The installer selects the correct build for your system, verifies its SHA-256 checksum, and installs niblet in /usr/local/bin when writable or ~/.local/bin otherwise. If the name is available, it also adds a pixlet compatibility command.

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Verify the install

If both commands run, the CLI is ready.

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Update the CLI

The updater checks the stable release, downloads the build for your system, verifies its SHA-256 checksum, and atomically replaces the current executable. If its install directory is not writable, rerun the installer with NIBLET_INSTALL_DIR set to a writable directory.
A native Windows release is not available yet. Use Ubuntu in WSL2.
CLI v0.54.8 can fail to update manifest.yaml on a Windows-mounted WSL path such as /mnt/d/project because the file update calls chmod. Update to v0.54.9 or newer to fix it. On older versions, work in the Linux filesystem (for example ~/projects/my-app), push there, and keep the resulting app_id when copying the manifest back. Version 0.54.9 removes that unnecessary permission change; it still needs write access to the directory to replace the manifest atomically.

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Next step

Build your first app

Create a project and open your first local preview.
Last modified on September 2, 2026