Domains, tunnels, webhooksin one beautiful app
Create .localhost domains with HTTPS, share via tunnels, inspect traffic, and test webhooks. All from one beautiful app.
Local Domains
Beautiful .localhost URLs
Auto HTTPS
One-click SSL certificates
Public Tunnels
Share with anyone instantly
Webhooks
Capture & inspect requests
Traffic Inspector
Real-time HTTP debugging
Port Manager
See & kill port processes
Everything you need for local development
Stop juggling multiple tools. OtterKit brings all essential local development features into one elegant application.
Local Domains
Create beautiful .localhost domains for your projects. No more remembering port numbers.
Auto HTTPS
Automatic SSL certificates with one-click trust. Get the green lock in your browser instantly.
Public Tunnels
Share your local server with anyone. Get a public URL in seconds, no configuration needed.
Webhook Testing
Create instant webhook endpoints. Capture, inspect, and replay incoming requests.
Traffic Inspector
Real-time HTTP traffic monitoring. See every request and response with full details.
Port Manager
See what processes are running on any port. Kill them instantly and save favorites.
Certificate Manager
Full control over your SSL certificates. Trust, regenerate, or export with ease.
Built for developers who value their time
OtterKit is designed to get out of your way and let you focus on what matters: building great software.
- No configuration files to manage
- Works with any local server
- Native macOS performance
- Beautiful, intuitive interface
- Instant setup, zero dependencies
Simple pricing
Pay yearly, use on all your devices.
OtterKit Pro
Full access to all features
Or start with a 3-day free trial
Frequently Asked Questions
Everything you need to know about OtterKit.
What is OtterKit?
OtterKit is a powerful desktop application for local development on macOS. It helps you create .localhost domains with automatic HTTPS, share your local server via public tunnels, test webhooks, and inspect HTTP traffic - all from one beautiful interface.
Is there a free trial?
Yes! OtterKit offers a 3-day free trial with full access to all features. No credit card required. After the trial, you can purchase a Pro license for $29/year to continue using OtterKit.
What operating systems does OtterKit support?
Currently, OtterKit is available for macOS 12.0 (Monterey) and later. We support both Apple Silicon (M1/M2/M3) and Intel-based Macs. Windows and Linux versions are on our roadmap.
How do .localhost domains work?
OtterKit acts as a local DNS resolver and reverse proxy. When you create a domain like myapp.localhost, OtterKit registers it with your system and routes all requests to your specified local port. This happens entirely on your machine with no external services.
Are the SSL certificates trusted by browsers?
Yes! When you trust OtterKit's Certificate Authority (CA), all certificates it generates are trusted by every browser on your machine. You'll see the green padlock just like on production sites.
How do public tunnels work?
Public tunnels create a secure connection between a public URL and your local server. When someone accesses the public URL, the request is securely forwarded to your machine. Tunnels are great for client demos, webhook testing, and mobile device testing.
Can I use OtterKit with any local server?
Absolutely! OtterKit works with any HTTP server running on your machine - Node.js, Python, Ruby, Go, PHP, or any other framework. Just point OtterKit to the port your server runs on.
Does OtterKit require an internet connection?
Local domains and HTTPS work completely offline. Public tunnels require an internet connection since they route traffic through external servers. The Traffic Inspector works regardless of internet connectivity.