QuickLook vs Seer in 2026
QuickLook vs Seer for Windows file previews, with SageThumbs 2K as a third option. Compare what each tool's page says, what each costs and what to check.
2Dex is published by the makers of SageThumbs 2K, RēDesign and VectorMagik, which are compared here alongside other tools.
Seer's page says you can copy text and content from the preview without opening the original app. [1] QuickLook's page says it supports PDF, Word, Excel, and PowerPoint documents. [2] SageThumbs 2K adds Explorer thumbnails for 363 file types Windows can't render natively. [3]
| Option | Price | Space-bar preview | Explorer thumbnails |
|---|---|---|---|
| QuickLook | not published | Press Space [2] | not published |
| Seer | not published | not published | not published |
| SageThumbs 2K | Free for personal use; commercial US$2.99 a month or US$49 once [3] [3] | On by default unless another Space-bar previewer is present [3] | 363 file types Windows can't render natively [3] |
The short answer
QuickLook's page says it supports more than 100 file formats. [2] You press Space to see a file preview. [2] Seer has built-in preview support for PDFs, images, code, video, archives, Markdown, and plugins. [1] SageThumbs 2K adds File Explorer thumbnails for 363 file types that Windows can't render natively. [3]
If you want previews of archives, QuickLook's page lists support for ZIP, RAR, 7Z, and TAR archives. [2] If you want to copy text out of a preview, Seer's page says you can. [1] SageThumbs 2K pulls an embedded preview directly out of design and CAD files such as Photoshop, Affinity, AutoCAD DWG and CorelDRAW with no rendering needed. [3]
What QuickLook and Seer do
QuickLook. Its page says it gives instant previews with zero lag. [2] It also says it supports videos such as MP4, AVI, MKV, and MOV. [2] Its page lists Fluent Design System integration, meaning it follows the look of Windows. [2]
Seer. It was first released on September 28, 2015 and has been continuously updated since. [1] Its page lists handling very large files, such as 100M-line text files, massive PDFs and archives. [1] It lets you copy text and content directly from the preview without opening the original app. [1]
What SageThumbs 2K is built for
SageThumbs 2K is made by the team that publishes this site. It adds File Explorer thumbnails for 363 file types that Windows can't render natively, including camera RAW, Photoshop PSD, HEIC/AVIF, and video. [3] For design and CAD files such as Photoshop, Affinity, AutoCAD DWG, and CorelDRAW, it pulls an embedded preview directly out of the file with no rendering needed. [3]
Images carrying an embedded ICC profile or wide-gamut tag (Display P3 / Adobe RGB) are converted into sRGB before display. [3] From the right-click menu you can convert images, resize them, rotate or flip them losslessly, and combine images into a PDF or CBZ. [3] It shows image size in pixels, camera details and audio tags in Explorer's file info, hover tooltips and sortable columns. [3] A QuickLook-style instant previewer is on by default unless another Space-bar previewer is present. [3]
Pricing and fees
QuickLook: its facts here give no price, so the price is not published in the sources used for this page.
Seer: no price is published in the sources used for this page either.
SageThumbs 2K is free for personal use, meaning not for paid or business work, under the PolyForm Noncommercial License 1.0.0. [3] Commercial use needs a per-installation licence: US$2.99 a month, or US$49 once for a perpetual licence with 12 months of updates. [3] Business installs get a 7-day evaluation with every feature, after which thumbnails and previews stop until a licence key is entered. [3]
Getting started and everyday use
QuickLook: you press Space on a file to get a preview. [2] The sources here say nothing more about its installation.
Seer: its sources say previews are built in for several kinds of files, and you can copy text from a preview. [1] [1] Seer's sources here say nothing about installation.
It runs on Windows 11, with separate installers for x64 and ARM64, the two processor types. [3] You can use a portable zip, which runs without installing and needs no administrator access. [3] Thumbnails also work in OneDrive and Synology Drive folders, and it never downloads online-only files just to draw a thumbnail. [3] Multi-file jobs such as resize, rotate, strip and combine-to-PDF are spread across every CPU core. [3] You can choose which entries appear in the right-click menu and their order. [3]
Things to check before you choose
Does the tool preview the exact file types you work with, such as PSD, Affinity or DWG files? Check each tool's format list against your own folders.
Does it show thumbnails in Explorer, or only a preview when you press a key? Check whether you need thumbnails, a key-press preview or both.
What does it cost for your use, and is a price published? Check the licence terms for work projects.
Which Windows versions and processor types does it support? Check your Windows version and processor type before installing.
Can it handle your largest files, and does it deal with colour profiles the way you expect? Check with a few real files.
How to choose
For document previews on Space, QuickLook's page lists support for PDF, Word, Excel, and PowerPoint. [2]
For very large files, Seer's page lists 100M-line text files, massive PDFs and very large archives. [1] For copying text out of a preview, Seer's page says it supports that. [1]
For Explorer thumbnails of RAW, PSD, HEIC/AVIF and video files, SageThumbs 2K's claims cover that. [3] For converting or resizing images from the right-click menu, its claims cover that too. [3] For batch jobs from typed commands, SageThumbs 2K includes a command-line tool for thumbnails, conversions and batch jobs. [3]
Frequently asked questions
What is the difference between QuickLook and Seer?
QuickLook's page says it gives instant file previews when you press Space. [2] Seer's page says it has built-in previews and lets you copy text from a preview. [1] [1] Compare their format lists with your own files.
Does QuickLook preview RAW images?
Videos listed are MP4, AVI, MKV and MOV. [2] The facts here do not list RAW, so check your own RAW files before relying on it.
Can Seer handle very large files?
Seer's page lists 100M-line text files, massive PDFs and very large archives. [1] It does not give timings, so check it against your own largest files before depending on it.
Is SageThumbs 2K free?
It is free for personal, noncommercial use under the PolyForm Noncommercial License 1.0.0. [3] Commercial use needs a per-installation licence: US$2.99 a month, or US$49 once for a perpetual licence with 12 months of updates. [3]
Does SageThumbs 2K work with Photoshop and DWG files?
Its claims say it pulls an embedded preview directly out of design and CAD files such as Photoshop, Affinity, AutoCAD DWG, and CorelDRAW, with no rendering needed. [3] It adds Explorer thumbnails for 363 file types Windows can't render natively. [3]
It is free for personal, noncommercial use under the PolyForm Noncommercial License 1.0.0. [3]
Try SageThumbs 2KSources
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