Code Flow Visualizer

Where does a request actually go after line 12? Which branch runs when the payload arrives empty, and which one has never run at all? Code Flow Visualizer takes the code you paste in and describes the path execution takes through it, in plain words.

Reading control flow by eye is slow. You lose the thread at the third nested condition and scroll back.

What is Code Flow Visualizer?

Code Flow Visualizer answers one question about a block of code: what happens, in what order. You paste a function, a handler or a whole file into the prompt box, which asks for the code you want explained. What comes back is the execution path written out as steps.

What The Flow Breakdown Shows

A Checkout Handler, Traced Step By Step

You inherited a JavaScript handler called handleCheckout and nobody knows when the receipt email fires. Paste the function. Set Language to JavaScript, Explanation Depth to High-Level, Audience to Intermediate and Output Format to Step-by-Step, then switch on Note Edge Cases.

1. handleCheckout(req, res) reads the cart from the request body.
2. If cart.items is empty it returns 400 and stops here.
3. Otherwise checkStock() runs for each item, one after another.
4. Payment succeeds, the order row is written, then the receipt job is queued.
...

Step 3 is the useful one. The loop runs in sequence, which nobody reading the code quickly would notice.

How Does Code Flow Visualizer Work?

Paste the code, pick a model from the selector, open the advanced options accordion, then generate. The output card carries the breakdown with a word count and a reading time, plus copy, share, listen and downloads as TXT, Word or HTML. Earlier runs sit in the activity history panel.

Language takes Auto-Detect or a named language such as Go, Ruby or C#. The Line-by-Line toggle turns the trace into a much longer per line account, Add Examples and Add Summary bolt on sample values and a closing paragraph, and Custom Instructions takes notes like "ignore the logging calls".

Where You Still Have To Read The Code

• A call into another file is named, not followed. Paste both if the answer spans them.
• Async work can be listed in written order, not real order, so check anything without an await.
• Dead branches read as live ones, because the caller that proves otherwise is not in the box.
• Nothing runs the code. This is a reading of the source, not a profiler trace.

When the breakdown shows a branch that is plainly wrong, the Error Fixer is the next stop with your stack trace. More options sit in the Coding Tools category.

EizTools is a free AI platform with a separate workspace for every job, and Code Flow Visualizer is the one for tracing execution. No account, no quota, no card details. Model families sit in a selector above the prompt box, so if one trace reads too shallow, switch engines and run it again.

Frequently Asked Questions

Most debugging time goes on rebuilding the order of events in your head. Code Flow Visualizer writes that order down for you, which is usually enough to see the problem.

Paste the function you were squinting at into the box above.