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Put your local app on a public URL.

Securely expose a web server on localhost to the internet, even from behind a NAT or firewall, with secure tunnels.

Get started (for free)

Then, inspect and replay every request in real-time.

Stop context switching and turn “how do I trigger that webhook again?” into a single click to replay.

Traffic inspector showing HTTP request details with one-click replay
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Why ngrok

The fastest way to put anything on the internet.

Diagram showing how ngrok connects your local app to the internet

The ngrok agent on your local machine creates a secure outbound tunnel to ngrok's cloud service.

Demo without redeploying

Give your local app a public URL to work with collaborators directly from your dev machine, then protect it with auth.

Build webhook integrations faster

Send webhooks to your local machine to inspect, debug, and iterate. We'll even verify signatures with your signing key.

Connect ChatGPT & Claude to local MCP servers

Let cloud LLMs pull data from your local machine. Debug MCPs with exact request payloads and hit replay to iterate quickly.

Test mobile apps against development backends

Configure your app to use the ngrok URL that points at your local backend—it won’t change between home, work, or a coffee shop.

Get started

Get a public URL for your app right now.

ngrok is a standalone executable with zero runtime dependencies that works on every OS.

1

Install the ngrok agent

brew install ngrok
sudo unzip ~/Downloads/ngrok-v3-stable-darwin-arm64.zip -d /usr/local/bin
2

Add your authtoken

ngrok config add-authtoken "<YOUR_AUTHTOKEN>"
Don't have an authtoken? Sign up for a free account.
3

Start an endpoint

ngrok http 80
4

Open your URL at https://your-assigned-url.ngrok.app

That’s it! You didn’t need to open ports, provision a TLS certificate, or run your own reverse proxy.

1

Install the ngrok agent

winget install ngrok -s msstore
scoop install ngrok
Expand-Archive $HOME\Downloads\ngrok-v3-stable-windows-amd64.zip
2

Add your authtoken

ngrok config add-authtoken "<YOUR_AUTHTOKEN>"
Don't have an authtoken? Sign up for a free account.
3

Start an endpoint

ngrok http 80
4

Open your URL at https://your-assigned-url.ngrok.app

That’s it! You didn’t need to open ports, provision a TLS certificate, or run your own reverse proxy.

1

Install the ngrok agent

curl -sSL https://ngrok-agent.s3.amazonaws.com/ngrok.asc \  | sudo tee /etc/apt/trusted.gpg.d/ngrok.asc >/dev/null \  && echo "deb https://ngrok-agent.s3.amazonaws.com bookworm main" \  | sudo tee /etc/apt/sources.list.d/ngrok.list \  && sudo apt update \  && sudo apt install ngrok
sudo tar -xvzf ~/Downloads/ngrok-v3-stable-linux-amd64.tgz -C /usr/local/bin
snap install ngrok
2

Add your authtoken

ngrok config add-authtoken "<YOUR_AUTHTOKEN>"
Don't have an authtoken? Sign up for a free account.
3

Start an endpoint

ngrok http 80
4

Open your URL at https://your-assigned-url.ngrok.app

That’s it! You didn’t need to open ports, provision a TLS certificate, or run your own reverse proxy.

1

Install the ngrok agent

docker pull ngrok/ngrok
2

Start an endpoint

docker run --net=host -it -e NGROK_AUTHTOKEN="<YOUR_AUTHTOKEN>" ngrok/ngrok:latest http 80
docker run -it -e NGROK_AUTHTOKEN="<YOUR_AUTHTOKEN>" ngrok/ngrok:latest http host.docker.internal:80
Don't have an authtoken? Sign up for a free account.
3

Open your URL at https://your-assigned-url.ngrok.app

That’s it! You didn’t need to open ports, provision a TLS certificate, or run your own reverse proxy.

1

Install the Docker Desktop Extension

Install the Docker Desktop Extension
2

Follow the in-app instructions to add your authtoken

Don't have an authtoken? Sign up for a free account.
3

Start an endpoint for a running container

4

Open your URL at https://your-assigned-url.ngrok.app

That’s it! The extension handles authentication and tunnel setup for you.

Traffic Policy

Secure your URL with authentication.

Instead of sharing localhost with the whole internet, lock it down to just the people or requests you authorize.

ngrok http 80 --traffic-policy-file policy.yml

policy.yml

on_http_request:  # redirect users to Google to log in  - actions:      - type: oauth        config:          provider: google   # allow logins *only* from acme.com  - expressions:      - "!actions.ngrok.oauth.identity.email.endsWith('@acme.com')"    actions:      - type: deny

policy.yml

on_http_request:  # verify webhook signatures from your provider  - actions:      - type: verify-webhook        config:          provider: github          # access your signing key from a secure ngrok vault          secret: ${secrets.get('webhook-vault', 'github-secret')}

policy.yml

on_http_request:  # redirect users to your OpenID provider to log in  - actions:      - type: openid-connect        config:          issuer_url: https://accounts.google.com          # access your OIDC details from a secure ngrok vault          client_id: ${secrets.get('auth-vault', 'oidc-client-id')}          client_secret: ${secrets.get('auth-vault', 'oidc-client-secret')}          scopes:            - openid            - email

policy.yml

on_http_request:  - actions:      - type: basic-auth        config:          credentials:            # add up to 10 username:password pairs            - user01:${secrets.get('basic-auth-vault', 'password01')}            - user02:${secrets.get('basic-auth-vault', 'password02')}
More about Traffic Policy
Features

When you're ready for more than just a URL.

Any protocol, not just web services

Developing on databases, Kafka, gRPC, WebSockets, WebRTC, SSH? If it speaks TCP, you can go online in one line.

$ ngrok tcp 22
$ ngrok http 80
$ ngrok tls 5432

Packaged for your stack

The ngrok agent also comes as Docker container, Docker Desktop extension, and Kubernetes Ingress + Gateway controller. Or embed ngrok in your app with native SDKs.

~ docker pull ngrok/ngrok
~ npm install @ngrok/ngrok
~ helm install ngrok-operator ...

Bring your own domain

Create a DNS CNAME record to use your own domain name for your endpoint URL.

ngrok http 8080 --url https://app.acme.com

Wildcard endpoints

Does your app have multiple subdomains? No problem, handle traffic for all of them with a single command.

ngrok http 8080 --url https://*.app.acme.com

Automate with APIs

Automate your dev environment by importing ngrok into your scripts to control it programmatically. See our SDK docs.

const ngrok = require("@ngrok/ngrok"); const srv = http.createServer(handler);await ngrok.listen(srv); console.log(`devenv ingress at: ${srv.listener.url()}`);

Modify traffic, not your app

Add headers, rewrite URLs, redirect paths and replace body text. All without changing your code.

on_http_request:  - type: add-headers    config:      headers:        host: "site.dev"  - type: url-rewrite    config:      from: /products/?(.*)      to: /products.php?query=$1
For teams

Security and control without slowing down your devs.

  • Standardize auth on every endpoint.
  • SIEM logging on every request.
  • ACL controls on what developers can expose.
Read the guideTrust center
SOC2 Type II
HIPAA & BAA
GDPR
CCPA
EU-US DPF
RBAC
SSO & SCIM
Audit logs
Data residency
Custom domains

So easy it feels like magic.

Get a public URL for localhost in less time than it took you to read this page. Just like 15.3 million other devs.

Scott Motte
@motdotla

ngrok is so effing amazing

Peter Vukovic
@pvukovic

Spent 3 hours looking for a good ngrok alternative. Let me save you some time: there isn’t a better ngrok alternative.

Lyzi Diamond
@lyzidiamond

OMG life changer. I can’t imagine how I lived without ngrok.

Get started (for free)Follow the quickstart

PS, it can be this easy in prod too...

No need to “upgrade” to a hodgepodge of ELBs, NLBs, firewall rules, DNS updates, nginx configs, and Cloudflare.

Check it out

Frequently asked questions

Answers come from ngrok.com and the ngrok docs, and can be wrong. Check the linked pages before you rely on one.