SageThumbs-2k
by LunarWerxs
Windows 11 shell extension (Rust): Explorer thumbnails for 331 file types Windows can't show, including camera RAW, PSD, HEIC/AVIF, video, ebooks, comics and CAD. Crash-isolated, source-available rebuild of SageThumbs.
146stars
9forks
Rust
Added 8/25/2026
⚠️ Third-Party Software Notice
This skill is third-party open-source software developed and hosted independently on GitHub. SkillsLLM is an informational directory and does not control or maintain the underlying repository.
Any security checks, ratings, or warnings displayed by SkillsLLM are automated and limited in scope. They do not constitute a security certification or guarantee that the software is safe, error-free, or free from malicious code, vulnerabilities, compromised dependencies, or prompt-injection risks.
Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.
MCP Serversavifcamera-rawcodeccomicsebookexplorerfile-explorerheicimage-viewermcpmcp-serverpsdrawrustsagethumbsshell-extensionthumbnail-providerthumbnailswindowswindows-11
Installation
# Add to your Claude Code skills
git clone https://github.com/LunarWerxs/SageThumbs-2kGetting Started
Guides for using mcp servers skills like SageThumbs-2k.
- Best MCP Servers in 2026Category-by-category picks: databases, dev tools, productivity, browser automation.
- What is an AI Skills Marketplace?Definitions, how marketplaces work, and how to choose between them in 2026.
- Getting Started with AI SkillsFirst-time install walkthrough for Claude Code, Codex CLI, and ChatGPT.
Security ReportVerified
Last scanned: 8/25/2026
{
"issues": [],
"status": "PASSED",
"scannedAt": "2026-08-25T04:37:52.562Z",
"npmAuditRan": true,
"pipAuditRan": true,
"promptInjectionRan": true
}SageThumbs 2K
Thumbnails for everything Windows won't show you.
A modern, crash-isolated Rust shell extension for Windows 11: the clean-room revival of the legendary (but decade-abandoned) SageThumbs.
⬇ Download · Features · Formats · FAQ · Changelog · Build from source
SageThumbs 2K is a crash-isolated Rust shell extension for Windows 11 that adds File Explorer thumbnails, a right-click image toolkit, and a QuickLook-style preview for 334 file types Windows can't render natively, including camera RAW, Photoshop PSD, HEIC/AVIF, video, ebooks, comics, and the long tail of obscure formats.
TL;DR
- 🖼️ Explorer thumbnails for 334 file types it ignores: camera RAW, Photoshop, HEIC/AVIF, video (MKV, WebM, MP4, MOV…), JPEG-XR, MS Office, DjVu, ebooks & comics, 3D-print files, and the obscure long tail.
- 🛡️ A corrupt or malicious file can't crash Explorer: runs out-of-process, panic-guarded, with a sandboxed decoder.
- ⚡ Fast even on big files: camera RAW thumbnails from its embedded preview instead of a slow demosaic (3–13× quicker), and no format is allowed to hang a folder.
- 🧰 Right-click toolkit: convert, resize, lossless rotate, combine-to-PDF/CBZ, system-wide eyedropper, OCR, and more; all non-destructive, and multi-file jobs run in parallel across every core.
- 👁️ Press Space to preview any file, QuickLook-style: an instant full-size popup with video & audio playback, syntax-highlighted code, rendered Markdown, multi-page PDF paging, font specimens, archive listings, SQLite databases (tables, columns and rows, read-only), email files (.eml and Outlook .msg: headers, body and the attachment list, with nothing fetched from the web), 3D-print models (STL/OBJ/PLY, shaded), a light/dark button on the window itself (for the dark photo or bright scan that reads better the other way round), arrow-key folder browsing and full-screen (F11). Works in Explorer, on the Desktop, in Everything search results, and inside any app's Open/Save dialog.
- 🔤 Copy text off your screen: drag a region and the words land on your clipboard, in an editable window so you can fix a misread. Uses Windows' own recognizer, so it adds nothing to the download.
- 🎛️ Make the menu yours: drag-reorder (and show/hide) every right-click entry and its dividers; the context menu mirrors your layout exactly.
- 🎨 Redesigned Settings: a Win11-style category nav rail with toggle switches, a search box that finds any setting on any page, system-following dark mode, 36 languages.
- 🦀 100% clean-room Rust, free for personal use (PolyForm Noncommercial); no GFL.
Download the installer → Two clicks and your File Explorer just... works.
Note from the Developer
I'm a huge fan of SageThumbs. There are 4 things I always install on a new build, Chrome, XnShell, Everything and SageThumbs. Having noticed multiple system crashes from SageThumbs recently and no update in almost a decade, I decided it was time to right this injustice...
After about a week, and an embarrassing amount of tokens, we now have a ground-up, rust native, alternative that now supports hundreds of formats, extensive red teaming, obsessively optimized for speed with carefully audited packaging, dozens of iterations through UI/UX for simplicity, menu editors, a color picker, screenshot tool, etc.
Please tell your friends, star the repo and if you find anything broken, please let me know.
The story
The original SageThumbs was a Windows legend. It made Explorer show thumbnails for hundreds of formats nothing else could. Then it stopped: no updates since ~2017, built on the proprietary, frozen GFL library.
SageThumbs 2K rebuilds it from scratch in safe Rust (a maintained decode pipeline, real crash isolation, and a native Windows 11 look) while keeping the one thing that made it great: thumbnails for everything.
✨ Features
| 🖼️ 334 formats | Camera RAW (Canon/Nikon/Sony/Fuji/…), PSD, GIMP XCF, DICOM, OpenEXR, FITS, HEIC/AVIF, JPEG-2000/XL/XR, Targa, SGI, and more |
| 📚 Ebooks & comics | EPUB, MOBI/AZW (Kindle), FB2, CBZ/CB7/CBR/CBT: real covers in Explorer (a native-Rust DarkThumbs port). Plain ZIP/RAR/7Z archives within the configured file-size limit get a contact-sheet thumbnail of the images inside, too |
| 🎨 Art / CAD / 3D / design | PSD/PSB, Affinity, Clip Studio, Krita, OpenRaster, Blender, 3MF, FreeCAD, G-code, SketchUp, Rhino, AutoCAD DWG, 3ds Max, Adobe XD, InDesign, Visio, CorelDRAW, Fusion 360 (.f3d): preview pulled straight from inside the file (no host app needed) |
| 📄 DjVu | Pure-Rust, zero-GPL decode via djvu-rs; scanned books show their text |
| 🔊 Docs & audio | PDF first page, Microsoft Office (Word/Excel/PowerPoint) & OpenDocument, and album art for MP3/FLAC/Ogg/Opus/M4A/WMA/DSF (DSD)/… (WMA/ASF and DSD/.dsf via hand-rolled parsers; lofty can't read either) |
| 👁️ Space-bar preview | Tap Space in Explorer (or on the Desktop) for an instant QuickLook-style popup of the selected file: any supported format at full size, plus video & audio playback (with a scrubber + volume), syntax-highlighted code, GitHub-style rendered Markdown, animated GIF/APNG/WebP, a real PDF viewer (continuous scrolling, a clickable page-thumbnail strip, zoom that re-renders sharp, and Ctrl+F text search via Windows' built-in OCR), font specimens (.ttf/.otf/.ttc), archive listings (zip/7z/rar), SQLite databases (.db/.sqlite: every table's columns and first rows, plus the schema, strictly read-only), ←/→ folder browsing and full-screen (F11). The caption toolbar carries a light/dark toggle for that window alone, independent of the app theme, and a gear that opens the Quick preview settings. Optionally renders local HTML in a locked-down WebView2 (scripts off, no network) when enabled. Off by default; opt in from Settings |
| 🧰 Right-click toolkit | Convert (29 targets), resize, shrink-for-email, lossless JPEG rotate/flip, combine→PDF/CBZ, batch rename from EXIF/tags, eyedropper, set-as-folder-icon, OCR, strip metadata, upload-to-catbox (copy link) |
| ⚡ Parallel batch | Multi-file Convert / Resize / Rotate / Strip and Combine-to-PDF fan out across all CPU cores (6–15× faster): a tiny dependency-free scoped thread pool, no rayon bloat in the shell DLL |
| 🎛️ Make the menu yours | The Settings "Menu items" list lets you drag-reorder every right-click entry and its group dividers: the menu mirrors your layout exactly (WYSIWYG). Tick items off to hide them, or hit Reset order for the default |
| 🤖 CLI + MCP server | st2k.exe: thumbnail · convert · batch · rotate · ocr · pdf · … as a scriptable/AI-agent toolbox (st2k --mcp); batch parallel-processes whole folders in one process. The MCP server adds view (decode any supported format to a PNG block so an AI agent can see the file) and compress tools |
| 📇 Details pane & columns | An IPropertyStore handler surfaces image dimension |
Frequently Asked Questions
What is SageThumbs-2k?
SageThumbs-2k is an open-source mcp servers skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by LunarWerxs. Windows 11 shell extension (Rust): Explorer thumbnails for 331 file types Windows can't show, including camera RAW, PSD, HEIC/AVIF, video, ebooks, comics and CAD. Crash-isolated, source-available rebuild of SageThumbs. It has 146 GitHub stars.
Is SageThumbs-2k safe to use?
Yes. SageThumbs-2k passed SkillsLLM's automated security scan — a dependency vulnerability audit plus prompt-injection heuristics — with no high-severity issues. You can read the full report in the Security Report section on this page.
How do I install SageThumbs-2k?
Clone the repository with "git clone https://github.com/LunarWerxs/SageThumbs-2k" and add it to your Claude Code skills directory (see the Installation section above).
What programming language is SageThumbs-2k written in?
SageThumbs-2k is primarily written in Rust. It is open-source under LunarWerxs on GitHub, so you can review or fork the full source.
Are there alternatives to SageThumbs-2k?
Yes. SkillsLLM lists many other MCP Servers skills you can browse and compare side by side. Open the MCP Servers category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh SageThumbs-2k against similar tools.
Comments (0)
to leave a comment.
No comments yet. Be the first to share your thoughts!
Related Skills
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
242,960
36,768
JavaScript
AI Agentsai-agentsanthropic
Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.
202,326
60,365
TypeScript
MCP Serversaiapis
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
185,940
28,768
JavaScript
AI Agentsai-agentsanthropic
A cross-platform desktop All-in-One assistant for Claude Code, Codex, OpenCode, OpenClaw, Grok Build & Hermes Agent. Only official website: ccswitch.io
129,211
8,859
Rust
AI Agentsai-toolsclaude-code
Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local deterministic AST parsing, every edge explained, no vector store.
110,162
10,719
Python
AI Agentsai-agentsantigravity
An open-source AI agent that brings the power of Gemini directly into your terminal.
106,672
14,480
TypeScript
AI Agentsaiai-agents
Popular in MCP Servers
Top skills in this category by stars
🕷️ An adaptive Web Scraping framework that handles everything from a single request to a full-scale crawl!
76,335
7,634
Python
MCP Serversaiai-scraping
⭐AI-driven public opinion & trend monitor with multi-platform aggregation, RSS, and smart alerts.🎯 告别信息过载，你的 AI 舆情监控助手与热点筛选工具！聚合多平台热点 + RSS 订阅，支持关键词精准筛选。AI 智能筛选新闻 + AI 翻译 + AI 分析简报直推手机，也支持接入 MCP 架构，赋能 AI 自然语言对话分析、情感洞察与趋势预测等。支持 Docker ，数据本地/云端自持。集成微信/飞书/钉钉/Telegram/邮件/ntfy/bark/slack 等渠道智能推送。
61,803
24,878
Python
MCP Serversaibark