Introducing RCS Composer — preview RCS messages and export JSON
RCS Composer is a simple website that helps you build an RCS message, preview exactly how it will look, and download the underlying JSON structure for use in your own systems and tooling.
What problem it solves
RCS messages can include rich components (text, suggestions, rich cards, carousels). When you’re designing one, it’s easy to get stuck bouncing between:
- editing a JSON payload
- guessing what it will look like on a phone
- tweaking fields until the structure is valid
RCS Composer keeps this loop tight: edit → preview → export.
How to use it
- Open the composer and start building your message (text, cards, suggestions, etc.).
- Use the live preview to confirm layout, copy, and interaction.
- Download JSON to get a machine-readable representation of what you built.
That exported JSON is useful when you want to:
- save message templates in your product
- generate payloads in code
- share a reproducible message design with teammates
- keep rich message specs version-controlled
What’s inside the exported JSON?
The download contains the structured representation of your message (the same structure the preview is based on). Think of it as a portable “recipe” for the message: content + components + options in a deterministic format.
If you’re integrating with an RCS provider, you can typically take this structure and map it into whatever payload shape your provider expects.
Notes on privacy
Treat your message content as production data: avoid pasting secrets, credentials, or personal data you shouldn’t share. (If you’re evaluating this tool for internal use, exporting JSON also makes it easy to review what fields you’re generating.)
Feedback welcome
If you run into a component you can’t model, a validation edge case, or a preview mismatch, open an issue or send feedback — those are the fastest ways to improve the composer.