Someone needs clause 14. You have a ninety-page contract. Sending the whole thing and saying "it's on page 62" is worse for them and worse for you — it buries the point and hands over eighty-nine pages they had no business reading.
Extracting pages is a two-minute job, and your computer probably already does it.
Extract, split, or delete?
Three related operations that tools name inconsistently:
Extracting copies selected pages into a new document, leaving the original intact. This is what you want most of the time.
Splitting divides one document into several — either at chosen points, or into single-page files. Useful when a scanner has produced one file containing twenty separate invoices.
Deleting removes pages from the document in place. The same end result as extracting the rest, but destructive, so work on a copy.
Using what you already have
macOS Preview. Open the PDF, show thumbnails with View → Thumbnails, Cmd-click to select the pages you want, then File → Export as PDF. Only the selected pages are written out. To go the other way, select unwanted pages and press Delete, then Export. Preview also lets you drag a selected thumbnail straight out to the Desktop, which instantly creates a one-page PDF — the fastest method that exists for a single page.
Any browser or reader, anywhere. Open the document, press Ctrl+P (Cmd+P), set the page range to what you want — 62 or 12-18 or 1-5, 8, 10-12 — and choose "Save as PDF" instead of a printer. You now have a new PDF containing exactly those pages. This works on every platform with no software at all, and most people never think of it. The one caveat is that printing discards bookmarks, links, and tags, so it is best for short excerpts rather than structured documents.
Command line. qpdf keeps the document structure intact rather than re-rendering:
qpdf input.pdf --pages input.pdf 12-18 -- output.pdf
Poppler's pdfseparate splits into single pages. Both are the right tool for repeated or scripted work.
Free desktop applications. PDFsam Basic is built specifically for splitting and merging and handles bulk operations well. PDF24 Creator does the same on Windows.
Online tools
Smallpdf, iLovePDF, Sejda and others all offer split and extract, with thumbnail interfaces that make selecting pages visual and easy. They work well.
The considerations are the familiar ones: your document is uploaded to their servers, and free tiers cap how much you can process. Since extraction is frequently used to avoid over-sharing a sensitive document, uploading that same document to a third party to do it is worth a moment's thought. The local methods above avoid the question.
To be clear about our own scope: Docento.app edits page content — signatures, text, stamps — rather than restructuring documents, so it does not extract or split. Preview or the print-to-PDF trick will do it faster than any website anyway.
Getting it right
Check the page numbers you actually mean. Printed page numbers rarely match PDF page numbers, because front matter, covers, and unnumbered pages shift everything. "Page 1" of a report is often PDF page 3. Always confirm against the thumbnail rather than the printed folio.
Include the context. A single clause pulled out of a contract with no heading, no section number, and no indication of what document it came from is genuinely ambiguous — and for anything legal, potentially misleading. Include the surrounding section, or the cover page, so the excerpt is self-identifying.
Watch for split content. Tables and figures that span a page break come out cut in half if your range stops in the middle.
Extraction is not redaction. Removing pages 20–30 keeps the information you wanted excluded out of the new file, which is good. But if what you actually need is to remove sensitive material within a page you are sending, extraction does nothing for that — see how to redact text in a PDF.
Check the metadata. The extracted file usually inherits the original's title, author, and properties, which may name a document you did not intend to reference.
Extracting shrinks the file, but not always proportionally. Shared resources like embedded fonts may be copied wholesale into the new document. If size matters, compress the result.
A signed document loses its signature. Extracting pages from a digitally signed PDF invalidates the signature, since the file has changed.
After extracting
The shorter document is usually the one you actually work on: add your signature to the extracted contract page, add a note explaining what the excerpt is and where it came from, or add page numbers so the new document is navigable on its own.
And if you need the opposite operation, how to combine PDF files covers putting documents back together.