AI Code Walkthrough Generator
Get a guided, line-by-line tour of your code
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What happens between someone clicking checkout and the confirmation email arriving? Could you draw that path across your own codebase without opening it?
Most of us know our files and not our flows. That is fine until a new person joins, or you have to explain a change to someone who was not there. The AI Code Walkthrough Generator turns a set of code into an ordered tour: what runs first, what it hands to what, and where the interesting decisions happen.
Short answer: The AI Code Walkthrough Generator is a free AIToolsay tool that turns code into a guided tour. Paste the files or functions involved in a flow, choose the depth and the audience, and it returns an ordered explanation of how execution moves through them.
What is AI Code Walkthrough Generator?
A walkthrough is different from an explanation. An explanation tells you what a function does. A walkthrough tells you the order things happen in and why one step leads to the next.
The prompt box asks you to paste the code you want explained. For a walkthrough that means more than one piece: the entry point, whatever it calls, and the place the flow ends up. Order matters, so paste them in roughly the order they run.
Ordered, not alphabetical
The output follows execution rather than file structure, which is how people actually need to learn a system.
Pitched at your reader
Audience decides whether this is an onboarding document, a review note or a briefing for someone non technical.
Decision points marked
Branches, guards and early exits get called out, because those are the parts a new reader misses.
Exportable as documentation
A walkthrough written once and exported as DOC is onboarding material you did not have yesterday.
Why Use AI Code Walkthrough Generator?
Onboarding is the obvious case. A new joiner does not need every function explained, they need three flows explained end to end, after which the rest of the codebase makes sense on its own.
The less obvious case is your own. Writing a walkthrough of a flow you are about to change is the fastest way to find the step you had forgotten was in there.
| Reader | What they need from a walkthrough | Audience setting |
|---|---|---|
| New developer | The path, with names of the real files | Beginner or Intermediate |
| Reviewer of a change | Where the change sits in the flow | Reviewer |
| Support engineer | Where a given symptom could come from | Team |
| Product or project manager | What the system does, without the mechanics | Non Technical |
Who Should Use It?
- Teams onboarding someone who cannot spare a week of pair programming
- Developers documenting a flow they own before going on leave
- Reviewers who need to understand a path before judging a change to it
- Consultants writing up how a client system works after a handover
- Anyone about to refactor a flow they have never traced end to end
Note Say where the flow starts and where it ends. "From the HTTP handler to the row being written" gives the walkthrough a shape. Without a start and an end, you get a set of explanations rather than a tour.
| Flow worth documenting | Why it is usually the right one |
|---|---|
| The main money path | Everyone touches it and nobody has written it down |
| Sign in and session handling | Security sensitive, and full of implicit rules |
| The slowest background job | The one people are asked about during incidents |
| Anything with a queue in the middle | The handoff is invisible in the code itself |
How Does AI Code Walkthrough Generator Work?
Prompt box. Paste the code involved in the flow, roughly in execution order, with a line saying where the flow begins and ends.
Model selector. Choose the engine, from MSB AI, OpenAI ChatGPT, Google Gemini, Anthropic Claude AI, xAI Grok AI, DeepSeek, Qwen, Meta AI, NVIDIA AI, OpenRouter AI and MiniMax.
Advanced options accordion. There are ten controls in there: Language, Explanation Depth, Audience and Output Format as dropdowns, four toggles, a Depth slider and a free text field.
Generate button. Everything runs through the prompt engineering layer written for code explanation, which is the instruction set that produces a narrative rather than a set of summaries.
Output card. The walkthrough appears under the button with a live word count, plus copy, listen, reuse, download and open in full view.
Export row. DOC, TXT and HTML. DOC is the one here, since walkthroughs usually end up in a shared document.
Activity history. Session generations stay listed, so you can build a walkthrough for three separate flows and keep them all open while you assemble an onboarding guide.
Step-by-Step Guide
- Pick one flow and write down where it starts and where it finishes.
- Collect the code for that path only. Resist the urge to include everything nearby.
- Open the AI Code Walkthrough Generator and paste the pieces in execution order.
- Label each piece with its file path so the walkthrough can refer to real locations.
- Set Audience to match whoever will read it, and Output Format to Step by Step.
- Turn Add Summary on so the document opens with the shape of the flow.
- Generate, then check the order. If a step is out of place, your paste order was probably wrong.
- Export as DOC and keep it. A walkthrough is worth more as a file than as a conversation.
Advanced Options Guide
| Option | What it controls | When to change it | Suggested start |
|---|---|---|---|
| Language | Auto Detect, Python, JavaScript, TypeScript, Java, C#, C++, Go, PHP or Ruby | Set it when the flow crosses files that look different from each other | Auto Detect |
| Explanation Depth | High Level, Line by Line, Conceptual, Detailed, Beginner or Expert | High Level for a first orientation, Detailed for a working document | Detailed |
| Audience | Beginner, Intermediate, Advanced, Non Technical, Team or Reviewer | The setting that matters most here. Pick the actual reader | Team |
| Output Format | Plain Explanation, Inline Comments, Step by Step, Summary or Doc Comment | Step by Step is the natural format for a walkthrough | Step by Step |
| Line by Line | Explains individual statements as well as the flow | Turn off. It buries the narrative under detail | Off |
| Add Examples | Adds a sample request or input travelling through the flow | Leave on. Following one example through is what makes a tour concrete | On |
| Add Summary | Opens with an overview of the whole path | Keep on. Readers need the map before the directions | On |
| Note Edge Cases | Marks the branches and failure paths along the way | Leave on for anything that will be used to debug later | On |
| Depth | Slider from 1 to 100 controlling how much detail each step carries | Lower for onboarding, higher for a document that supports debugging | 55 |
| Custom Instructions | Free text up to 1000 characters over the settings | Use it to name the flow and its boundaries | "Follow one checkout request from the route to the confirmation job" |
Caution A walkthrough goes stale faster than any other documentation, because it describes behaviour across files rather than one function. Date it, name the commit it was written against, and treat it as a snapshot rather than a permanent truth.
Example Outputs
Flow: a checkout request, from the route to the confirmation email job. Six files pasted in order, Audience Team, Output Format Step by Step, Add Examples on, Depth 55.
OVERVIEW
A checkout request is validated at the route, converted into
an order inside a transaction, and then handed to a queue.
Nothing about the email happens in the request itself.
STEP 1 routes/checkout.php
The route validates the cart token and rejects the request
before any order exists. This is the only place the token
is checked, which matters if you ever add a second entry
point.
...That last sentence is the kind of thing a walkthrough is for. It is not in any single function, it is a property of the flow, and it is exactly what a new person needs to know before adding a second entry point six weeks later.
For a level up from a single flow to how the whole system fits together, the AI Architecture Explainer is the right tool, and the AI Technical Spec Writer turns a walkthrough into a document you can maintain.
Tips & Common Mistakes
What makes a good walkthrough
- One flow, with a stated start and end
- Files pasted in execution order and labelled with their paths
- One example input followed the whole way through
- Audience chosen for the actual reader, not for you
What makes a poor one
- Pasting a whole module and hoping for a narrative
- Leaving Line by Line on, which drowns the story
- Covering three flows at once
- Publishing it without a date, so nobody knows when it stopped being true
- ✅ Start and end of the flow stated
- ✅ Only the files on that path pasted
- ✅ Paths included so steps refer to real locations
- ✅ Audience set to the person who will read it
- ✅ Exported, dated and stored somewhere findable
Pro tip Generate a walkthrough for your three most important flows and put them in the repository. Most onboarding pain comes from the fact that nobody has ever written down what happens end to end, and three documents fixes more of it than a week of pairing.
AIToolsay is a free AI tools platform made of dedicated workspaces rather than one general chat box with many labels on it. Each tool has its own prompt engineering and its own options panel, which is why an explanation tool asks about audience and depth rather than tone and word count. Every one of them is free, and no account is required. Picking the engine is part of it too, from MSB AI, OpenAI ChatGPT, Google Gemini, Anthropic Claude AI, xAI Grok AI, DeepSeek, Qwen, Meta AI, NVIDIA AI, OpenRouter AI and MiniMax. Sitting beside the tools are an AI directory, an AI models directory, courses, prompts, guides and news, all reachable from the AIToolsay homepage.
Frequently Asked Questions
Is the AI Code Walkthrough Generator free?
Yes. It is free to use, nothing is installed, and no account is needed to generate a walkthrough.
How much code should I paste?
One flow's worth. Entry point, the functions it calls, and the end of the path. Pasting a whole module gives you a set of summaries rather than a tour.
Does the order I paste in matter?
Yes. Paste in roughly the order things run and label each piece with its file path. That order is a strong hint about the narrative you want back.
Can it produce something for non technical readers?
Set Audience to Non Technical and Depth low. You get a description of what the system does at each stage without the mechanics, which is what most briefings need.
What if the flow crosses several services?
Describe the boundary in Custom Instructions and paste the code either side of it. Nothing in the code says a network call happens between two files, so you have to say it.
How do I keep the walkthrough current?
Date it and record which commit it describes. Regenerate it when the flow changes meaningfully. A walkthrough with a date is useful even when it is old, because the reader knows what they are looking at.
Is this the same as documentation?
It is one kind. Documentation covers what things are. A walkthrough covers what happens, in order, which is the part that is almost never written down and the part new people ask for first.
A codebase is a set of files to the person who built it and a maze to everybody else. Pick one flow, paste it in the order it runs, and let the AI Code Walkthrough Generator write the tour you would have given in person if you had the afternoon free.
Thanks for reading, and spare a thought for whoever joins next month. If this becomes part of how you document, join the AIToolsay community, follow along on social media, turn on push notifications for new tools, and subscribe to the newsletter for the highlights.
Let AI Speak.
Sabir
Founder of AIToolsay and a passionate AI enthusiast dedicated to building practical, user-friendly AI tools that simplify everyday tasks.
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