What we collect

There is no account, and we do not ask for a name or email to use the viewer. The site uses hosting infrastructure and PostHog analytics. Analytics excludes your editor content and share-link fragments.

PostHog — cookieless by default

PostHog measures page views and feature use. By default it runs cookieless, without storing an analytics identifier on your device. PostHog processes request information on its servers to group cookieless activity; this is still data collection.

Accept enables an analytics cookie and a stable browser identifier to measure return visits. Decline keeps analytics cookieless; it does not turn off counting. You can change this choice below.

Your choice is remembered in localStorage. Our PostHog project uses its EU ingestion service, reached through the site’s /ingest proxy.

What it does receive

Page paths and page language, with share fragments removed.
Use of viewer controls and coarse document-size ranges.
Browser, screen size, approximate country and referring site.
Page performance and application errors, with document content excluded.

Excluded from analytics

Editor content and rendered document text.
Share-link fragments, which contain the document.
Exact document sizes; feature events use coarse ranges.
Screen recordings; session replay is disabled.

What stays on your device

Your editor draft and a backup of the draft replaced by an email template, saved in localStorage when storage is available — or in IndexedDB when the draft is too large for localStorage.
Whether you have seen the MailerLite offer in this tab, and a 30-day pause after you dismiss it or follow an affiliate link. These preferences stay in sessionStorage and localStorage.
Layout, theme, language and console preferences.
Your consent choice and, if accepted, an analytics cookie.

Clearing this site’s browser storage removes local drafts and preferences. Download a file to keep a separate copy. Clearing local storage does not delete analytics already received or copies you have shared.

How share-links work

Share compresses the editor source into the URL fragment after #. The browser does not include that fragment in its HTTP request to our server. Anyone receiving the full link can decode the document. It contains source, not live JavaScript state or form values. Sharing through another service gives that service the full link.

Third-party requests

Vercel serves the site and processes requests needed to deliver it.
PostHog receives analytics through our /ingest proxy.
Interface fonts are bundled and served with the site.
Your document can load external images, styles and scripts, and make network requests from the preview.

The sandbox restricts access to the parent page; it does not block all network activity. Only open code and external resources you trust.

Updates

Last updated 2026-09-10. Material changes are announced in the changelog.