StratoSort Stack

Organize, search and chat with your files using AI that runs on your own computer.

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StratoSort reads what is inside your files (documents, spreadsheets, images, scans, audio and video), suggests a clear name and the right folder for each one, and lets you search and ask questions across all of them. The AI runs on your machine: there is no account, no cloud service and no telemetry.

What it does

• Organizes by content. Suggests names and folders from what a file contains, not its filename. You review every suggestion before anything moves, and every move can be undone.
• Smart Folders. Describe a folder in plain words ("invoices and receipts") and matching files are routed into it, including new files as they arrive.
• Search by meaning. Find the report about "how warming affects wildlife" even when those words are not in its name. Exact matches such as an invoice number still work.
• Chat with your documents. Ask questions and get answers built from your own files, with sources.
• See how files connect. Relate (a graph) and Atlas (a map) show related files, clusters and near-duplicates.
• Reads images, scans and recordings. Vision and OCR for photos, screenshots and scanned PDFs; local Whisper transcription for audio and video.
• Works with other AI tools. An opt-in local MCP server lets Claude Desktop, Cursor or Zed search your files without uploading them.
• Optional cloud AI. Bring your own Anthropic or OpenAI-compatible key for some tasks, with a monthly spend cap. Search and embeddings always stay local. See Cloud AI Providers.

Install

1. Download the installer for your system from GitHub Releases.
2. Launch it and choose a model profile. StratoSort downloads its AI models once: about 7 GB for Base, or about 10 GB for Better Quality.
3. Add a folder and review the suggestions.

No terminal, Python, Docker or API keys. Windows installers are Authenticode-signed and macOS builds are signed and notarized by Kennedy Applied Sciences, Inc. The Install Guide covers first-launch prompts and how to check the download's checksum.

System	Supported	Installers
Windows	Windows 10 (22H2) or 11, x64 or arm64	Installer or zip (x64)
macOS	macOS 13 (Ventura) or later, Apple Silicon or Intel	DMG or ZIP
Linux	Ubuntu 22.04 or later and derivatives, x64 or arm64	AppImage or .deb
Memory	8 GB RAM minimum; 16 GB RAM and an 8 GB GPU for Better Quality
GPU	Optional. NVIDIA CUDA, Apple Metal or Vulkan; falls back to CPU

Need it on a machine with no internet access? See Offline and air-gapped install.

Privacy

• Analysis, search and chat run on your computer with AI models stored locally.
• No account, no analytics, no crash reporting to anyone.
• After the one-time model download, the only automatic connection is the update check, which you can turn off in Settings → Application → Background update checks. Every connection the app can make is listed in Network Transparency.
• The search index, including text extracted from your files, stays in the app's data folder on your machine.

See SECURITY.md to report a vulnerability.

Supported files

Documents and office files, text and code, images, audio, video, archives, and 3D/design files: over 100 file types in all.

Full list

• Documents and office: .pdf, .doc, .docx, .xlsx, .pptx, .odt, .ods, .odp, .epub, .eml, .msg, .kml, .kmz, .ipynb
• Text, code and data: .txt, .md, .rtf, .tex, .csv, .json, .xml, .yml, .yaml, .html, .htm, .css, .scss, .sass, .less, .js, .ts, .jsx, .tsx, .sql, .py, .java, .c, .cpp, .h, .rb, .go, .rs, .php, .sh, .bat, .ps1, .ini, .conf, .log, .scad. Files over the text size limit (50 MB by default) are analyzed from their first part.
• Images: .jpg, .jpeg, .png, .gif, .bmp, .webp, .svg, .tiff, .tif, .ico; .heic and .heif when the bundled FFmpeg can decode them, otherwise by filename and date
• Audio (transcribed locally): .mp3, .wav, .flac, .aac, .ogg, .oga, .m4a, .m4b, .opus, .wma, .aiff, .aif
• Video (audio transcribed; keyframe descriptions optional): .mp4, .mov, .mkv, .webm, .avi, .flv, .m4v, .wmv, .3gp, .mts, .m2ts
• Archives: .zip, .tar, .tgz and .gz are listed by content; .rar, .7z and .bz2 are organized by name only
• 3D and design: .stl, .obj, .3mf, .gcode, .scad, .ai, .eps (metadata and text); .psd by filename and date only

Legacy .xls and .ppt files are organized by filename and date only; save them as .xlsx or .pptx to have their contents analyzed.

Documentation

For users	For developers
Install Guide	Getting Started
User Guide	Onboarding: clone to first PR
Screen-by-Screen Walkthrough	Architecture
Network Transparency	Configuration Reference
Cloud AI Providers	Testing
MCP Server	Release Guide
Commercial Licensing	All developer docs

The same docs are published at stratosort.com/docs.

Build from source

Requires Node.js 20.19 or later (see .nvmrc).

git clone https://github.com/iLevyTate/StratoSortStack.git
cd StratoSortStack
npm ci
npm run dev

The app opens with the same first-launch model setup as the installer. Electron 45, React 19, node-llama-cpp for local inference and Orama for search; see Architecture and Getting Started for the rest.

Contributing and support

• Bugs: open a bug report
• Ideas: open an issue
• Code: read CONTRIBUTING.md, then open a pull request. Run npm test before you do.
• Testing a release: the Tester Guide explains what to check and how to report it.

License

Free for personal and other noncommercial use under the PolyForm Noncommercial License 1.0.0. Commercial use needs a paid license from Kennedy Applied Sciences, Inc.; see Commercial Licensing. Third-party components keep their own licenses (Third-Party Notices).

StratoSort Stack succeeds the original StratoSort and was inspired by llama-fs, Local-File-Organizer and ai-file-sorter.

_{© 2026 Kennedy Applied Sciences, Inc.}