# What a SayPage page can contain

> The page format: one HTML document with animations, embeds (YouTube, Spotify, Calendly, Google Maps…), approved open source libraries and your own images. What is allowed and what is refused, and why.

Source: https://saypage.ai/docs/page-format · Updated October 5, 2026

You never have to write any of this yourself: your assistant reads SayPage's page guide before it writes a page, and SayPage tells it exactly what to fix when something is off. This page is for the curious, and for knowing what to ask for.

## One page, one HTML document

A SayPage page is a single, self-contained HTML document: its styles and scripts are written inside it, its images are uploaded to SayPage, and it loads nothing from other sites except the embeds and libraries listed below. It is a page, not an app: no build step, no server code, no database.

This is what lets SayPage check every page before it goes online, serve it fast, and keep visitors safe.

## What a page can do

- **Animations:** entrances, scroll reveals, tap feedback, animated gradients, marquees, counters, confetti, Lottie illustrations.
- **Interactive bits:** tabs, accordions, filters, ingredient checklists, timers, countdowns, carousels, charts, a search box over the page's own content.
- **Embeds:** videos, music, bookings, forms, maps and posts from the services below.
- **Your images:** up to 30 photos per page, uploaded to SayPage.
- **One custom font**, inlined in the page, from a font file whose license allows it (for example the SIL Open Font License of most Google Fonts). Otherwise, system fonts.
- **Links** anywhere: `https:` and `http:` addresses, `mailto:`, `tel:` and `sms:`. Affiliate links are fine.

## Embeds

Embeds are iframes from these services:

| Service | What for |
|---|---|
| YouTube (including youtube-nocookie.com) | Videos |
| Vimeo | Videos |
| Spotify | Tracks, albums, playlists, podcasts |
| Apple Music | Tracks, albums, playlists |
| SoundCloud | Tracks and playlists |
| Calendly | Booking a call or a session |
| Typeform | Forms and surveys |
| Google Maps | A map of your shop, venue or event |
| Instagram | A post |
| TikTok | A video |

A page has no `<form>` of its own: to collect sign-ups or orders, link to a form on Tally, Typeform or Google Forms, or embed a Typeform. Videos and music are embedded from the services above rather than uploaded.

## Libraries

Pages may load these open source libraries, served by SayPage at pinned versions (your assistant gets their exact addresses from the `list_libraries` tool):

| Library | What for | License |
|---|---|---|
| Alpine.js (CSP build) | Small interactive components | MIT |
| Motion | Animations | MIT |
| Anime.js | Animations | MIT |
| Swiper | Carousels and sliders | MIT |
| canvas-confetti | Confetti | ISC |
| Chart.js | Charts | MIT |
| Lucide | Icons | ISC |
| AOS | Animate on scroll | MIT |
| Lottie (light player) | Vector animations | MIT |
| Day.js | Dates and countdowns | MIT |

## What SayPage refuses

Some things are refused because they could harm visitors or because SayPage could not check them:

- **Forms and sensitive fields:** `<form>`, password fields and card-number fields.
- **Network access from scripts:** pages cannot call other servers, so a page cannot quietly send visitors' data anywhere.
- **Tracking and storage:** no cookies, `localStorage` or other browser storage, and no analytics scripts. SayPage counts visits itself, without cookies.
- **Redirects and pop-ups:** scripts cannot send visitors elsewhere, open windows or change where a link goes. Every link is written in the page with its final address.
- **Link shorteners** (bit.ly, tinyurl, t.co…): links must show where they really go.
- **Hidden or encoded code:** scripts must be readable (no minified or encoded code, at most 100 KB of JavaScript), and pages carry no embedded files.
- **External images, scripts and fonts**, other than the embeds and libraries above.
- **Advertising** (ad networks) and **crypto wallet addresses**.
- **Hiding the SayPage badge** or stopping its links from working.

And, whatever the code: phishing, impersonation of a brand or organization, scams, sexual, hateful, violent or dangerous content, and anything illegal. See [Privacy and safety](https://saypage.ai/docs/privacy-and-safety).

## Size limits

| Limit | Value |
|---|---|
| HTML, with its CSS and JavaScript | 128 KB |
| JavaScript | 100 KB |
| Images per page | 30 |
| Page and images together | 10 MB |
| Inline SVG icon or `data:` image | 16 KB each, 64 KB of `data:` URIs per page (font included) |

## How pages are served

Every page is served on your site's address, over HTTPS, with a strict security policy written for that page: it can only load what it was published with. Pages are cached for a short time, so a new version shows up within about a minute of publishing.

## Next

- [Images and uploads](https://saypage.ai/docs/images)
- [Create, preview and publish pages](https://saypage.ai/docs/pages)