Sketch ideas at the speed of thought with InkCalibur
A fast, collaborative drawing canvas. Draw diagrams, brainstorm ideas, and collaborate in real-time.
Why InkCalibur?
Everything you need for a seamless drawing experience — from tools to real-time sync.
Infinite Canvas
Draw freely without limits. Zoom up to 1000% and pan anywhere to create endlessly.
Real-time Collaboration
Work together with your team using WebSockets. Every change syncs instantly across all users.
Versatile Drawing Tools
Rectangle, circle, ellipse, line & freehand pencil — draw anything you need with ease.
Precision Shapes
Create exact geometric shapes with customizable stroke color and adjustable stroke width.
Smart Eraser
Remove unwanted shapes with one click. Hover preview shows exactly what will be erased.
Export & Manage
Download your work as a PNG image or clear the canvas to start fresh whenever you need.
Public & Private Rooms
Create public rooms for open collaboration or password-protected private rooms for your team only.
Invite Links
Share a unique invite link so anyone can join your room instantly — no manual room search needed.
Email OTP Auth
Secure signup with email verification via 6-digit OTP codes that expire in 5 minutes.
Built for creators & devs
InkCalibur is designed for engineers, designers, and students who want a simple yet powerful way to visualize ideas. No clutter. No distractions. Just ideas on canvas.
Ready to draw?
Open InkCalibur and start sketching instantly.