UD5 Toolkit
Local Peer‑to‑Peer Chat - Online No‑Server Messenger
Create a temporary chat room between two browser tabs or devices on the same network using WebRTC data channels. Copy the code.
Tag: LocalStorage & SessionStorage Manager
7+ toolsReceipt & Expense Logger - Online Simple Finance
Snap or type expense details and store them locally. Categorize and see monthly totals. No cloud, no sign‑up.
Multi‑User Whiteboard (Local) - Online Shared Drawing
Open the same page in two tabs and draw together in real time using BroadcastChannel API. Share ideas without a server.
Font Access API - Online Browse Local Fonts
Enumerate all fonts installed on your device and see a real‑time preview. Useful for design tools. Permission required.
AI Background Remover (Local) - Online Remove Background Free
Automatically remove the background from any photo using a small on‑device AI model (WASM). No upload. Works offline.
Local Prompt Tester - Online Simulate LLM Response
Test prompt formatting without calling an LLM. See how your prompt would look with different templates. Dev tool.
Local Password Vault - Online Encrypted Browser Storage
Store passwords and notes encrypted with a master passphrase. Data lives only in your browser's localStorage. No cloud.