Comparisons

Does Cling search file contents?

Updated 2026-10-29 · 5 min read

This is the most common question about Cling. The answer is yes in Pro and no in the free mode, and how it works decides what it can find.

The answer

Cling Pro searches inside files: put words in square brackets, as in invoice [client], or use content:text. Cling keeps no content index of its own. It asks Spotlight's index, so PDFs, documents and text in screenshots come back quickly, and for places Spotlight does not index, such as hidden folders and app bundles, it reads the files on demand. The free mode matches filenames and paths only; content search is one of the Pro features.

Why that is a reasonable choice

A filename index is small, fast to build, and cheap to keep current. A content index is none of those things. Extracting text from every PDF, Word file, spreadsheet and email on a disk is expensive to do once and expensive to maintain — and Spotlight already does it.

So Cling builds its own index only for names, where speed and completeness matter most, and borrows Spotlight's for contents rather than doing that work twice.

When it stops mattering

Most of the time. Most searches are filename searches — you know roughly what the file is called, or what folder it is in, and a name index answers instantly.

When it matters a great deal

When the filename carries no information. Real examples:

• Scan_2019_04_11.pdf — a scanned contract, named by the scanner
• IMG_4471.pdf — a receipt photographed on a phone
• Document (3).docx — a download that collided with two earlier ones
• Untitled.pages — every Pages document nobody renamed

For these, the filename is noise. The only route in is the text inside.

Other ways to search contents

Spotlight, when it works. Its importers cover more formats than any third-party extractor ships with. Genuinely the best content search on the Mac when its index is healthy.

HoudahSpot, if you want to express complicated content queries over that same index.

Everywhere, if you want a filename index like Cling's and a content index that does not depend on Spotlight's: it extracts text from PDF, Office and iWork documents and plain text in folders you nominate, and contains: then searches it. Scoped on purpose: you pick the folders, so it never reads your whole disk uninvited. Ours, $19, and the reason this page exists on this site.

Running both

Nothing stops you keeping Cling for filenames and Spotlight for contents. Many people do, and it costs €12 rather than a decision.

Common questions

Does Cling index file contents?

Not itself. Cling keeps no content index of its own: in Pro, [text] searches ask Spotlight's index, and Cling reads files on demand where Spotlight has none, such as hidden folders and app bundles.

What is the best way to search inside PDFs on a Mac?

Spotlight when its index is healthy, since its importers cover the most formats. Everywhere extracts PDF and Office text in folders you choose, as a scoped alternative.

Can I use Cling and Spotlight together?

Yes, and it is a sensible arrangement: Cling for filenames, including the places Spotlight excludes, and Spotlight for contents.