For developers joining a codebase

Ship your first change without breaking things.

When you're new to a codebase, CodeTours builds your mental model for you — architecture, key flows, and the files that matter — in a narrated, guided tour.

Generate a tour See a sample tour

Step 3 · Request handler

def handle(req):
    user = authenticate(req)
    if user is None:
        return unauthorized()
    return render(req, user)

▶ 0:24 / 1:08 Narrated

A familiar scene

You know this feeling.

It's week one. The repo has 400 files, no useful README, and the tech lead is in back-to-backs all day.

You're back on a project you haven't touched in six months — and every decision you made has faded.

You're reviewing a PR in code you've never seen, and you can't tell if “LGTM” means “looks good” or “I hope this works.”

CodeTours was built for this.

How it works

Three steps.

Paste a Git URL.

Public GitHub repo, your own fork, or a PR. No install.
We analyze the code.

CodeTours reads the repo and produces 8–15 steps covering architecture, entry points, build, run, and extension points.
Listen and follow along.

A narrated walkthrough plays in the browser. Every step points at real code.

The product

Watch the tour.

Three panels: step list, the code the step is pointing at, and a narration panel with audio.

https://codetours.ai/tour/example

@app.get("/")
async def index(request: Request):
    user_id = get_current_user_id(request)
    if user_id is None:
        return render("landing.html", ...)
    return render("index.html", ...)

Why CodeTours

Built for the code you didn't write.

Onboarding

Get an accurate mental model before you touch the code, so your first PR doesn't break something no one told you about.

Dormant code

Reload the context of a repo you haven't touched in months, in minutes — not hours.

Code review

Before you approve unfamiliar code, get a trustworthy walkthrough of how it works.

vs. the alternatives

Everything else you've tried for this.

READMEs and wikis
Stale the moment they're written.
Asking senior engineers
Doesn't scale. Interrupts flow. Creates dependency.
Generic LLM chat
Hallucinates your architecture. No repo-wide grounding.
CodeTours
Grounded in the current code. Generated on demand. Self-serve.

For leaders

For engineering leaders.

CodeTours pays for itself in hours your senior engineers don't spend re-explaining.

Shorten time-to-productivity per hire. Compress the weeks between hire date and first meaningful contribution.
Protect senior engineer capacity. Stop losing hours per week to repeat codebase walkthroughs.
De-risk knowledge concentration. When critical knowledge lives in one or two heads, a resignation stalls delivery.

Talk to sales

Recently generated

Featured Tours

Get started

Try it now.

Paste a Git URL. No signup required for public tours.

Want private tours, bigger models, or notifications when a tour finishes? See pricing →

Log in