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.

Domains, tunnels, webhooks
in one beautiful app

Name: OtterKit
Rating: 4.9 (127 reviews)
Author: OtterKit

Create .localhost domains with HTTPS, share via tunnels, inspect traffic, and test webhooks. All from one beautiful app.

Buy for $29/year

100% Local. Everything runs on your machine.3-day free trial included. No credit card.

Local Domains·Auto HTTPS·Public Tunnels·Webhooks·Traffic Inspector·Port Manager·Certificates

Features

Everything you need for local development

Stop juggling multiple tools. OtterKit brings all essential local development features into one elegant interface.

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.

Configuration needed

100%

Native performance

Built-in tools

Why OtterKit

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

100% private - runs entirely on your machine

Pricing

Simple, annual pricing

Pay yearly, use on all your devices.

OtterKit Pro

Full access to all features

$29/year

Subscribe - $29/year

Or start with a 3-day free trial

Everything included

3-day free trial

Unlimited local domains

Unlimited public tunnels

Unlimited webhooks

Auto HTTPS certificates

Traffic inspector

Port manager

Request replay

Priority support

All future updates

FAQ

Frequently Asked Questions

Everything you need to know about OtterKit.

Domains, tunnels, webhooksin one beautiful app