akon47/NvChat

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README

NvChat A Windows desktop app to chat with the free LLMs on build.nvidia.com Streaming chat · saved conversations · live markdown/code rendering · reasoning display · image attachments · in-app auto-update — ships as a single .exe English · 한국어

Markdown renders live as the answer streams in.

✨ Features

Model picker — loads the live model list via /v1/models (falls back to a curated list on failure) Streaming chat — real-time token streaming with an instant Stop button Live markdown while streaming — formatting renders as the answer arrives (like Claude / ChatGPT), not only when it finishes Reasoning display — collapsible thinking for models that emit reasoning_content / <think> (deepseek-r1, etc.) Image attachments (vision) — attach images to ask vision models (llama-3.2-vision, etc.); large images are auto-downscaled In-app auto-update — checks GitHub Releases, downloads the new .exe, verifies its SHA-256, and swaps itself in place (single-file friendly, no installer) Per-conversation usage — tracks requests and prompt/completion tokens per model, so you can see what each model spent in a conversation (even across mid-chat model switches) Desktop launcher — a global hotkey (default Ctrl+Shift+Space) pops a quick-chat mini window from anywhere + system tray (close minimizes to tray) Personalization — custom instructions (about you / response style) applied to every chat + reusable prompt presets Searchable model picker — filter 100+ models by typing Message actions — regenerate a response, edit & resend a user message, delete or copy individual messages Selectable markdown — headings/lists/nested & task lists/quotes/tables/links, syntax-highlighted code blocks with a copy button; assistant text is drag-selectable Conversation management — sidebar search, date groups (Today/Yesterday/…), pin, rename, autosave, model-generated auto titles Per-conversation settings — system prompt, Temperature/Top P/Max Tokens/Penalties Export — copy the whole conversation or save as Markdown Quality of life — scroll-to-bottom button, remembers window size/position, collapsible sidebar, keyboard shortcuts Safe storage — API key encrypted with Windows DPAPI, atomic file writes + automatic backup of corrupt files Multi-language — English & Korean UI, switchable in Settings (defaults to your Windows language on first run) UI — custom borderless dark theme with an NVIDIA-green accent; ChatGPT/Claude-style layout (bubble only on your messages)

📦 Download Grab the single NvChat.exe from Releases and run it. It's a self-contained single file that runs even without the .NET runtime installed. (Windows x64)

First run: the app isn't code-signed, so Windows SmartScreen may show a blue "Windows protected your PC" prompt. Click More info → Run anyway.

Once you're on a build with auto-update, new versions are offered inside the app — no need to re-download manually.

🔑 Get an API key

Sign in to build.nvidia.com On any model page, click Get API Key to create an nvapi-... key Paste it into the Settings window on first launch (or the ⚙ button), then Test connection → Save

The key is stored only on this PC + this Windows account, encrypted with DPAPI (%APPDATA%\NvChat\settings.json). It cannot be decrypted on another PC/account.

⌨️ Shortcuts

Key Action

Enter Send (switchable to Ctrl+Enter in Settings)

Shift+Enter New line

Ctrl+N New conversation

Ctrl+Shift+Space Quick chat from anywhere (global · configurable)

🛠️ Build from source

Run for development

Build the single-file release exe

→ NvChat/bin/Release/net8.0-windows/win-x64/publish/NvChat.exe

Endpoint: https://integrate.api.nvidia.com/v1 (OpenAI-compatible, configurable in Settings) Data: %APPDATA%\NvChat\ (settings.json, conversations.json) The free tier has rate limits — on HTTP 429, retry after a moment.

📄 License MIT — free to use, modify, and distribute.

source