2Dex Plain comparisons of image and design tools

Icaros vs Seer in 2026

Icaros vs Seer for Windows file thumbnails and previews, with SageThumbs 2K as a third option, using only what each tool's own pages say.

By 2Dex ·

2Dex is published by the makers of SageThumbs 2K, RēDesign and VectorMagik, which are compared here alongside other tools.

Icaros can provide Explorer thumbnails for video formats FFmpeg supports. [1] Seer has built-in preview support for PDFs, images, code, video, archives, Markdown and plugins. [2] SageThumbs 2K is a third option that pulls embedded previews out of design and CAD files. [3]

OptionPriceWhat its sources say it does
Icarosnot publishedExplorer thumbnails for video formats FFmpeg supports [1]
Seernot publishedBuilt-in preview for PDFs, images, code, video, archives, Markdown and plugins [2]
SageThumbs 2KFree for personal use; commercial US$2.99 a month or US$49 once [4] [5]Explorer thumbnails for 363 file types [6]

The short answer

Icaros can provide Windows Explorer thumbnails for video formats FFmpeg supports. [1] Seer has built-in preview support for PDFs, images, code, video, archives, Markdown and plugins. [2] SageThumbs 2K adds File Explorer thumbnails for file types that Windows can't render natively, including camera RAW and Photoshop PSD. [6]

For video thumbnails in Explorer, Icaros says it covers essentially any video format FFmpeg supports. [1] For previewing PDFs, images, code, video, archives and Markdown, Seer lists built-in support. [2] For design and CAD file thumbnails, SageThumbs 2K claims embedded previews from Photoshop, Affinity, AutoCAD DWG and CorelDRAW files. [3]

What Icaros, Seer is built for

Icaros. It can provide Explorer thumbnails for essentially any video format FFmpeg supports. [1] Icaros is described as a collection of lightweight Windows Shell Extensions. [7] Icaros can register filetypes supported by FFmpeg along with a number of other filetypes it supports natively. [8] Icaros also provides Explorer properties for a list of popular file types. [9]

Seer. It has built-in support for PDFs, images, code, video, archives, Markdown and plugins. [2] The facts used here say little else about it, so check its page for the details that matter to you.

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. [6] It pulls an embedded preview straight out of Photoshop, Affinity, AutoCAD DWG and CorelDRAW files. [3]

Images carrying an embedded ICC profile or wide-gamut tag (Display P3 / Adobe RGB) are converted into sRGB before display. [10] From the right-click menu you can convert, resize, rotate or flip images losslessly, and combine images into a PDF or CBZ. [11] Multi-file jobs such as resize, rotate, strip and combine-to-PDF are spread across every CPU core. [12] Thumbnails also work in OneDrive and Synology Drive folders, and it never downloads online-only files just to draw a thumbnail. [13] It adds image dimensions and EXIF camera details to Explorer's Details pane. [14] SageThumbs 2K says a corrupt or malicious file can't crash File Explorer. [15]

Pricing and fees

Icaros: its sources, as quoted here, state no price, so check its page. Seer: no price appears in its facts either, so a price is not published here.

SageThumbs 2K is free for personal, noncommercial use under the PolyForm Noncommercial License 1.0.0. [4] 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. [5] Business installs get a 7-day evaluation with every feature, after which thumbnails and previews stop until a licence key is entered. [16] The licence is the PolyForm Noncommercial License 1.0.0, and it is source-available. [17]

Getting started and everyday use

Icaros. Its page also says the settings window, IcarosConfig, requires .NET Framework 4, a Microsoft component that some Windows programs need in order to run. [18] It works on Windows Vista, 7, 8/8.1, 10 and 11. [19] Version 3.0.3 and earlier work partly on Windows XP (SP2 or later), with thumbnails only. [20]

Seer. The facts give no install steps. Day to day, it previews PDFs, images, code, video, archives and Markdown. [2]

SageThumbs 2K. It runs on Windows 11, with separate installers for standard PCs (x64) and ARM PCs (ARM64), which are different processor types. [21] You can use a zip that runs without installing and without administrator permission. [22] A QuickLook-style instant previewer is on by default unless another Space-bar previewer is present. [23] You can tick or untick right-click menu items, drag rows to reorder them and drag dividers to regroup the menu. [24] A command-line tool covers thumbnails, conversions and batch jobs, and can also connect to AI assistant apps. [25]

Things to check before you choose

How to choose

Frequently asked questions

What is the difference between Icaros and Seer?

Icaros can provide Windows Explorer thumbnails for essentially any video media format supported by FFmpeg. [1] Seer has built-in preview support for PDFs, images, code, video, archives, Markdown and plugins. [2] Check which one matches the files you open most often and whether you want folder thumbnails or a preview.

Does Icaros make video thumbnails in Explorer?

Icaros says it can provide Windows Explorer thumbnails for essentially any video media format supported by FFmpeg. [1] Icaros can register filetypes supported by FFmpeg along with a number of other filetypes it supports natively. [8] Check its page for the exact formats you use before installing it on a work machine.

How much does Seer cost?

No price for Seer appears in the facts used for this page, so a price is not published here. Its page does say it has built-in preview support for PDFs, images, code, video, archives, Markdown and plugins. [2] Check Seer's own page for current pricing and any licence terms for commercial work.

Is SageThumbs 2K free?

It is free for personal, noncommercial use under the PolyForm Noncommercial License 1.0.0. [4] 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. [5] SageThumbs 2K business installs get a 7-day evaluation with every feature, after which thumbnails and previews stop until a licence key is entered. [16]

Which Windows versions does Icaros support?

Icaros says it works on Vista, Windows 7, Windows 8/8.1, Windows 10 and Windows 11. [19] Its page also says the settings window, IcarosConfig, requires .NET Framework 4. [18] On Windows XP (SP2 or later), version 3.0.3 and earlier work partly, giving thumbnails only. [20]

It is free for personal, noncommercial use under the PolyForm Noncommercial License 1.0.0. [4]

Try SageThumbs 2K

Sources

  1. Icaros, github.com/Xanashi/Icaros, read 2026-10-07
  2. Seer, 1218.io, read 2026-10-07
  3. SageThumbs 2K's own description of itself (the product of this site's publisher)
  4. SageThumbs 2K's own description of itself (the product of this site's publisher)
  5. SageThumbs 2K's own description of itself (the product of this site's publisher)
  6. SageThumbs 2K's own description of itself (the product of this site's publisher)
  7. Icaros, github.com/Xanashi/Icaros, read 2026-10-07
  8. Icaros, github.com/Xanashi/Icaros, read 2026-10-07
  9. Icaros, github.com/Xanashi/Icaros, read 2026-10-07
  10. SageThumbs 2K's own description of itself (the product of this site's publisher)
  11. SageThumbs 2K's own description of itself (the product of this site's publisher)
  12. SageThumbs 2K's own description of itself (the product of this site's publisher)
  13. SageThumbs 2K's own description of itself (the product of this site's publisher)
  14. SageThumbs 2K's own description of itself (the product of this site's publisher)
  15. SageThumbs 2K's own description of itself (the product of this site's publisher)
  16. SageThumbs 2K's own description of itself (the product of this site's publisher)
  17. SageThumbs 2K's own description of itself (the product of this site's publisher)
  18. Icaros, github.com/Xanashi/Icaros, read 2026-10-07
  19. Icaros, github.com/Xanashi/Icaros, read 2026-10-07
  20. Icaros, github.com/Xanashi/Icaros, read 2026-10-07
  21. SageThumbs 2K's own description of itself (the product of this site's publisher)
  22. SageThumbs 2K's own description of itself (the product of this site's publisher)
  23. SageThumbs 2K's own description of itself (the product of this site's publisher)
  24. SageThumbs 2K's own description of itself (the product of this site's publisher)
  25. SageThumbs 2K's own description of itself (the product of this site's publisher)
  26. Icaros, github.com/Xanashi/Icaros, read 2026-10-07

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