---
id: mac-storage-basics.how-do-i-check-a-file-with-quick-look-before-deleting
url: https://storagestudio.us/faq/mac-storage-basics/how-do-i-check-a-file-with-quick-look-before-deleting
category: "Mac storage basics"
subcategory: "Finder tools for finding space"
question: "How can I check what a file is before deleting it, without opening it?"
alt_questions:
  - "quick look space bar mac"
  - "preview file without opening mac"
  - "check video before deleting"
  - "quick look finder"
  - "look inside file mac"
  - "preview files in finder"
short_answer: "Select the file in Finder and press the Space bar for a Quick Look preview, then use the arrow keys to step through other files."
tags: ["quick look", "finder", "cleanup"]
related: ["https://storagestudio.us/faq/mac-storage-basics/what-does-get-info-tell-me-about-a-file", "https://storagestudio.us/faq/mac-storage-basics/how-do-i-sort-files-by-size-in-finder"]
applies_to: "all"
last_reviewed: 2026-10-01
---

# How can I check what a file is before deleting it, without opening it?

Select the file in Finder and press the **Space bar**. Quick Look shows a preview — documents, images, PDFs and videos play right there — without launching an app. Press Space again to close it, or use the arrow keys to step through files while it's open.

It's the fastest way to review a list of big files: sort by size, then Quick Look each candidate and delete what you don't need. **Get Info** (Command-I) adds the size and dates — see [what Get Info shows](https://storagestudio.us/faq/mac-storage-basics/what-does-get-info-tell-me-about-a-file).