Import a document

If you already have curriculum documents, you can bring them into C3NTR in a few taps. The Document Map shows you how your file will be split into articles before anything is created.

Supported formats

C3NTR can import these file types:

• .docx — Microsoft Word documents
• .pdf — PDF documents (text is extracted page by page)
• .md — Markdown files
• .txt — Plain text files
• .rtf — Rich Text Format files
• Web URLs — Articles and web pages (content is extracted and converted to text)

Where to start an import

You can open the import flow from several places:

• Share from any app — In Safari, Notes, Files, Google Docs, or any other app, tap the share button and choose "Import to C3NTR". The document opens straight in the Document Map.
• Setup wizard — Step 4 of the wizard includes an import option.
• Edit mode — Open the article list in edit mode and choose import from the menu.

The Document Map

After choosing a file, the Document Map screen appears. This is a live preview of how your document will be split into articles.

• H1 headings become tag boundaries. Each H1 starts a new tag.
• H2 headings become article titles. Content under each H2 becomes the article body.
• Pseudo-headings — If your document uses bold or ALL-CAPS text instead of real headings, you can toggle a setting to promote them. This helps with older documents that were not formatted with heading styles.
• Images — If there is a single image in the document, it becomes the featured image. The first image under an H1 heading becomes the tag cover image.

Review the preview and adjust the settings before importing.

PDF documents

When you import a PDF, C3NTR extracts the text page by page. A banner reminds you that formatting (bold, headings) may not carry over perfectly from the original — review the headings and structure in the Document Map before importing.

If the PDF contains only scanned images with no selectable text, C3NTR will let you know that no text could be extracted.

Web pages and URLs

Share a web link from Safari or any browser and C3NTR will fetch the page, strip away navigation and ads, and convert the readable content to plain text. The original URL is added as a source link at the bottom of the imported content.

If the page has an Open Graph image (the preview image you see when sharing a link), it is offered as a cover image for the imported article.

Some websites load their content using JavaScript after the initial page load. If your import looks incomplete — missing images or text — tap Page missing content? Try full render at the top of the Document Map. This loads the page in a background browser, waits for everything to appear, and re-extracts the content including images that only exist in stylesheets.

Tag suggestions

After the Document Map has parsed your content, C3NTR suggests which of your existing tags each article might belong to. These appear as small chips below each article in the preview. Tap a suggestion to accept it, or ignore it — tags are never assigned automatically.

Tag suggestions are powered by the same on-device search model used for global search. Everything stays on your device.

Duplicate detection

If a tag with the same name already exists in your school, C3NTR will ask you what to do:

• Merge — Add the new articles to the existing tag.
• Rename — Create a new tag with a different name.
• Skip — Do not import that section.

After import

Imported articles are created as drafts. This gives you a chance to review and edit each one before your students see it.

An amber draft status bar appears on draft articles so you can see at a glance which ones still need attention. When a tag contains only hidden or draft articles, a publish prompt offers to make the whole tag visible at once.

Smart paste

If you paste more than 100 characters of structured text into the editor, a snackbar appears offering to open the Document Map. This is a quick way to import content that you have copied from another app.

Save as Template

After importing, you can save the result as a template. Other schools using C3NTR can then use your structure as a starting point for their own content.