SpreadsheetConverter Calculator

SpreadsheetConverter (https://www.spreadsheetconverter.com/) turns an Excel
workbook into an interactive, calculating web page. This plugin embeds that
calculator in WordPress as a Gutenberg block — rendered inline by your
theme (no iframe), SEO-visible, and recalculating live as visitors type.

Two hosting modes:

• Host on this site (recommended) — paste the conversion link copied
  from the SpreadsheetConverter task pane in Excel and click Host on this
  site. WordPress fetches the calculator from the SpreadsheetConverter
  cloud and stores it inside your own site
  (wp-content/uploads/ssc-embed/). Everything is then served same-origin
  — fast, no CORS, and the calculator keeps working forever, even after
  the conversion link expires.
• Link to the cloud — click Publish to Cloud in Excel, paste the
  permanent link. The calculator stays on the SpreadsheetConverter cloud;
  your page references it and is always current when you re-publish.

An offline fallback lets you upload the calculator zip manually if your
WordPress host cannot reach the SpreadsheetConverter cloud. Classic
(non-block) themes can use the [ssc_calc] shortcode.

One calculator per page. The block validates the pasted link and tells
you exactly what to do if it is the wrong kind (for example a temporary
“Test in Cloud” link).

External services

This plugin connects to the SpreadsheetConverter cloud in two situations,
both initiated explicitly by an editor — never on a public page view in
self-host mode:

1. Host on this site — when an editor clicks the button, the WordPress
   server downloads the calculator bundle from the conversion link’s host
   (*.spreadsheetconverter.com). The pasted URL (containing the
   conversion job id) is the only data sent.
2. Link to the cloud — the page embeds the calculator directly from
   the SpreadsheetConverter hosting cloud (*.spreadsheethosting.com);
   visitors’ browsers request the calculator files from that host. When
   configuring the block, the WordPress server fetches the published
   calculator’s index page once to read its name.

Both services are provided by Framtidsforum I&M AB (SpreadsheetConverter).
Terms of use: https://www.spreadsheetconverter.com/terms-of-use/
Privacy policy: https://www.spreadsheetconverter.com/privacy-policy/

Getting started

Part 1 — Convert your spreadsheet (in Excel)

1. Start Excel and open your workbook — e.g. mortgage-calculator.xlsx.
2. Open the SpreadsheetConverter task pane (Home ribbon →
   SpreadsheetConverter).
3. Sign in if prompted (required to convert).
4. Select Flavor = HTML and tick the Embeddable checkbox, then press
   Convert. The Embeddable option is required — it produces the inline
   bundle the block embeds without an iframe; a non-embeddable conversion (or
   another flavor) will not work in the block. The spreadsheet becomes an
   interactive web calculator (a few seconds).
5. Copy the link for the path you want:
   • To host it on your own WordPress site (recommended): after Convert,
     click Copy link. Use it within a few minutes (it is a short-lived
     conversion link).
   • To link to the SpreadsheetConverter cloud instead: first click
     Publish to Cloud, then Copy permanent link. Only a Publish to
     Cloud link works for cloud-linking — a conversion link, or a
     temporary “Test in Cloud” link (its address contains /tmp/), is
     rejected by the block.
   • In both cases you paste the whole link and the block double-checks
     it. Nothing is downloaded to your computer.

Part 2 — Add it to your WordPress page

1. Open your WordPress page for editing (Pages → Add New). You are
   already signed in to WordPress here — that is why you never type a
   password into Excel.
2. Add the SpreadsheetConverter block (＋ → “SpreadsheetConverter
   Calculator”).
3. Paste your link. The block recognizes the link type and offers the
   matching option:
   • Conversion link → Host on this site (recommended). Click it.
     WordPress fetches your calculator and stores it inside your own site.
   • Publish-to-Cloud link → Link to the cloud. The calculator stays
     on the cloud; your page references it.
   • Temporary “Test in Cloud” link → the block shows: “This is a
     temporary test link — click Publish to Cloud in Excel for a permanent
     one.”
   • Anything unrecognized → “That doesn’t look like a
     SpreadsheetConverter link — copy it again from the Excel panel.”
4. See the live preview inside the editor — no grey iframe,
   theme-styled, calculates live.
5. Press Publish (the WordPress button). The page goes live.
6. View your live page. It calculates, validates, moves between
   sheets, and Submit works.