Call-inFOR YOUR SLIDES
Call-in for your slides

Let your audience
call in, live.

Bring people back from a silent grid. Upload a PDF or paste your deck URL and get a presenter view, audience QR code, and moderator link in one minute.

Try it with your deck Ask your agent
  • No registration required
  • Supports PDF, Google Slides, and URLs
  • Open-source project
call-in.mashbean.net● LIVE
06 / SHARED QUESTIONS

Bring audience response
back into the room

Call-in
How easy is this to follow?Just right
👏💡❤️🤔
💬 How could this work in my context?
Start in one minute

Your usual deck.
A room that talks back.

No new slide software to learn. Call-in puts your deck, understanding signal, question pool, and live reactions in one presenter view.

01

Add your slides

Upload a PDF up to 20MB, or paste a Google Slides, Canva, or web-deck URL.

02

Open presenter view

Your deck, QR code, and live responses are ready together. Hide the top toolbar whenever you want a clean stage.

03

Let people call in

No app required. People scan, report understanding, react, ask questions, and support what others asked.

Try it here

This could be
your next talk.

See how Call-in keeps your slides and audience response together. Click the demo slide to replace it with your own PDF or deck URL.

Call-in · Presenter demo● LIVE
No deck at hand?Enter a real interactive room, not another static preview.

The demo starts with labeled sample data. Difficulty, reactions, and questions submitted through its QR code are added live and retained until the daily reset.

  • 45 difficulty ratings
  • 6 demo questions
  • Real interactions stay until the daily reset
Enter demo
Claude · Codex · AI agents

Skip setup.
Ask your agent.

If your agent can use a browser and access your deck, it can complete the same hosted creator flow for you.

Open https://call-in.mashbean.net/en/#create and use my attached PDF to create a Call-in event. Return the presenter, audience, and moderator links. Treat the moderator link as private.
Clear data boundaries

Your slides
remain yours.

Your deck disappears

An uploaded PDF is stored only for this event and automatically deleted after seven days. Call-in does not train on your deck or claim its copyright. Your copyright remains yours.

Responses are recorded

Events created through call-in.mashbean.net record anonymous audience responses to operate and improve the project. Event, deck, and response data are deleted together after seven days. Do not enter sensitive or confidential information.

Or host it yourself

Deploy the open-source service in your own Cloudflare account, so decks and responses pass only through infrastructure you control.

View source
Ask an agent to deploy
Get the source from https://github.com/mashbean/call-in, read the README and wrangler.jsonc, and deploy an independent Call-in service to my Cloudflare account. Do not overwrite any existing Worker, Durable Object, or domain. Run the tests first, then return the public URL, required configuration, and update process. If login, API-token creation, or custom-domain changes require my action, stop and tell me exactly what I need to do.
Frequently asked

Before you start,
you may be wondering.

Call-in does not replace your slide software. It adds a live audience response layer to the deck you already use.

Does the audience need to install an app?

No. Audience members scan the QR code in a phone browser to report understanding, react, and ask questions.

Can I keep using my existing slides?

Yes. Upload a PDF up to 20 MB or paste a public Google Slides, Canva, or web-deck URL.

How long does Call-in keep slides and responses?

Hosted events, uploaded PDFs, and anonymous audience responses are deleted together after seven days. The public demo resets daily.

Can I self-host Call-in?

Yes. Call-in is open-source under Apache-2.0 and can be deployed from GitHub to your own Cloudflare account.

Open source, one person

Help Call-in keep growing

This is a solo-maintained open-source project. Star it, report an issue, contribute on GitHub, or buy the author a coffee to support ongoing maintenance.

Buy me a coffeeSupport on GitHub