Start free. Let your story grow.

Available in the on-device workflow

You can import a public GitHub repository, create source-inspired screens, edit a tour, and download portable exports without signing in. The default generator does not call a paid AI service.

Local drafts are stored in your browser. They are useful for preparing and reviewing a story, but they are not public cross-device hosting. Export JSON to keep a copy outside browser storage.

• GitHub URL import with browser-generated WebP screens.
• Hotspot positioning, branching, and stage customization.
• JSON, Markdown, HTML guide, and README card exports.
• A public sample tour to explore the player.

Connected cloud publishing

Cloud authentication, hosted screenshots, and cross-device publishing require configured backend services. This deployment currently keeps cloud publishing disabled while that setup is completed. No hosted cloud plan or guaranteed unlimited storage is offered on this page.

If you connect your own storage and database, their usage limits and terms apply. A provider’s free allowance is not a promise that every future traffic level costs nothing. Keep usage controls and backup exports in place before sharing a tour widely.

Optional AI refinement

You may supply your own supported OpenAI or Gemini key to refine the copy generated from repository files. Provider usage can be billable. A model identifier and working provider account are required; DemoSynth does not include AI credits.

AI refinement is optional. You can generate the default source-derived draft and edit its wording yourself without a provider key.

GitHub API limits still apply

Public repositories can be imported without a GitHub token, but anonymous GitHub requests share the server connection’s API allowance. The importer displays a reset time if that allowance is exhausted.

An optional request-only public-read token can raise the available allowance. It does not turn a private repository into a supported public import, and you should never put the token in your README or demo export.

Premium subscriptions are being prepared

Monthly and yearly Premium options are planned, with US dollar card pricing and a separate INR price for UPI. The plan selector previews those choices; prices and paid allowances have not been decided. No checkout is open and no recurring charge is created.

Before activation, this page will show the final price, what the plan includes, renewal terms, and how to cancel. Current local capture and editing remain free. All embedded players retain the DemoSynth badge.

A practical way to start

Try one small tour on this device, review its screenshots, and keep a JSON backup. Use the guides to prepare your README card or written walkthrough. Connect public hosting only when the tour and its usage expectations are clear.