Feedback while you build
Straight from localhost

Share your localhost with one command. Reviewers leave feedback directly on your UI, and AI turns every comment into a clear list of changes — no deploys, no waiting.

Get StartedView on GitHub
Terminal
$npx checkpoint-cli share 3000
✓ Tunnel created
https://d7x2k.checkpoint.build
Share this link to collect feedback.
Watching localhost:3000...
// In Action

Feedback lives on your UI

Reviewers click directly on the page to leave a comment. No more "the thing on the left, kinda near the top."

●d7x2k.checkpoint.build
1
SarahSarah
Can we test something more benefit-driven? Like "Save 4 hrs a week" vs the current copy.
2
JakeJake
@Sarah The spacing between these cards feels tight on mobile — can we stack them vertically below 768px?
SarahSarah
@Jake Good call, will update!
3
MMia
This section feels empty, maybe add a subtle illustration or an empty-state message so it doesn't look broken.
JakeJake
@Mia Agreed, I'll add an empty-state component here.
SarahSarah
+Add Comment
Comments3
// How It Works

From localhost to done

No PRs. No deploy previews. No back-and-forth in Slack. Just spin it up, share, and iterate.

Run one command

Point the CLI at your dev server. It creates a secure tunnel and gives you a shareable link instantly.

Send the link

Drop it in Slack, email, or wherever your team lives. Reviewers open it in their browser — no setup, no accounts.

Collect feedback on the real UI

Reviewers click directly on the page to leave pinned comments. No screenshots, no guessing — feedback tied to actual elements.

AI turns comments into a change list

Checkpoint reads every comment, groups them by theme, and generates a prioritized list of changes. Just work down the list.

// Features

Less back-and-forth. More building.

Click-to-Comment

Reviewers click anywhere on your running UI to drop a pin and leave feedback — no screenshots, no guessing which element they mean.

Instant Localhost Sharing

One command turns your local dev server into a shareable link. Reviewers see exactly what you see — live, not a static build.

Feedback Dashboard

Every comment across every session in one place. See what's open, what's resolved, and what's blocking you.

Share With Anyone

Invite teammates, designers, or clients by email. Control who can view and comment. No accounts required to leave feedback.

// AI

Comments in. Change list out.

Checkpoint's AI reads every comment across every session, groups them by theme, and generates a prioritized list of what to change — so you stop re-reading threads and start shipping.

SarahSarah
The hero headline is way too small on desktop — it doesn't feel like a primary heading. Can we bump it to at least 48px and test a bolder weight?
JakeJake
These feature cards feel cramped — the text is right up against the edges. More inner padding and maybe 24px gap between cards.
MMia
The "Get Started" button blends into the background — it should be our orange brand color so it actually stands out as the primary action.
SarahSarah
Subtitle text under the hero barely passes contrast on my monitor. Needs to be lighter or use a different shade for WCAG AA.
Suggested changes
Bump hero h1 to 48px / semibold#typography
Increase card padding to 24px, gap to 24px#spacing
Swap CTA background to --orange-500#design
Raise subtitle to #a1a1a1 for WCAG AA#accessibility
Add bold font-weight to hero heading#typography
// Security

Your code never leaves your machine

Checkpoint doesn't proxy, store, or touch your source code. We rely on trusted tunneling providers you already know.

ngrokCloudflare Tunnel

Tunneled by ngrok & Cloudflare

No custom tunnel servers. Your traffic flows through ngrok or Cloudflare Tunnel — industry-standard, encrypted, audited.

Nothing stored

We never save your HTML, assets, or source code. The tunnel is a live passthrough. When you stop it, the link dies.

You control access

Every tunnel is private by default. You choose who can view it and revoke access anytime. No public URLs unless you want them.

Feedback before your next commit

One command. A link to your localhost. Comments in seconds. AI turns them into a change list.

$npx checkpoint-cli share 3000

Free while in beta. No credit card required.