Excel VBA Modernization

Finance · Payroll · Analytics

Stop rewriting macros by hand

Turn messy legacy VBA
into reviewable Python.

Paste VBA or upload .bas modules. Get a free compatibility audit, review every flagged construct, then export clean Python — without hallucinations, hidden changes, or code retention.

Check Compatibility Free Audit Try it now →

✓

Deterministic — no hallucinations

⊘

In-memory · no code retention

✓

Safe for finance & payroll

VBA Input→Python Output

Sub ProcessData()
  Dim ws As Worksheet
  Set ws = ThisWorkbook.Sheets("Data")
  For Each row In ws.Range("A2:A100")
    If ws.Cells(row,"B").Value > 0 Then
      ws.Cells(row,"C").Formula = "=VLOOKUP(...)"
    End If
  Next row
End Sub

# deterministic output — openpyxl
import openpyxl

def process_data(ws):
  # ⚠ flagged: implicit range end
  for row in range(2, 101):
    if ws.cell(row, 2).value > 0:
      ws.cell(row, 3).value =
        vlookup_equiv(ws, row)
  return ws

612→540

Lines of VBA modernized
in a typical finance module

Example stats — yours will vary

Risk flags surfaced
GoTo, ReDim, implicit variants

Explicitly flagged, not guessed

~3 hrs

Manual rewrite time saved
per legacy module

Estimated for a senior analyst

Lines of your code retained
In-memory · immediate discard

Privacy-first by design

Try it yourself

Paste VBA, get Python

Edit the sample below or paste your own macro. The converter runs in real-time — no account needed for up to 50 lines.

VBA input

Python output

Click "Convert" to see Python output...

Free · Up to 50 lines · No account needed

How it works

Three steps to clean Python

No account needed. No black box. Every change is visible, every risk is flagged.

📋

Paste or upload your VBA

Paste a macro directly or upload a .bas module. Works with any Excel VBA — finance macros, payroll scripts, data prep automation.

Free · No account

🔍

Review the audit report

Get a compatibility check with every risky construct surfaced — GoTo flows, ReDim Preserve, implicit variants, On Error patterns. Nothing is hidden or silently rewritten.

Full visibility

⚡

Export reviewable Python

Receive deterministic Python mapped to openpyxl. Side-by-side diff with change notes. Export to your repo and review before running a single line.

Diff-ready output

Why not just use ChatGPT?

Generic AI is not acceptable
for finance and payroll

If your macro touches payroll calculations, audit trails, or regulated data — silent hallucinations aren't a risk you can take.

Generic AI (ChatGPT, Copilot)Not recommended

Generative models that produce plausible-looking code with no guarantees

❌Non-deterministic — same input produces different output each run
❌Silent hallucinations — wrong logic presented with confidence
❌Your code may be used for model training
❌No audit trail — no record of what changed or why
❌Complex constructs (GoTo, On Error) silently mangled

VBAtoPythonDesigned for this

Deterministic parser built specifically for Excel VBA modernization

✅Deterministic — identical input always produces identical output
✅Risky constructs explicitly flagged — never silently rewritten
✅In-memory processing — zero code retention, zero training
✅Full change log — every transformation is documented
✅Built for audit — reviewable diff before you ship anything

Who it's for

Built for teams maintaining real spreadsheets

Not for learning Python. For making Excel automation survivable.

📊

Finance & Payroll Analyst

Inheriting legacy macros

You didn't write the macro. You just own it now. Every quarter it breaks in a slightly different way and you're the one who has to fix it before close.

“I need to know what this macro actually does before I modernize it — not just trust that the AI got it right.”

💻

Developer / Engineer

Asked to modernize Excel automation

You've been handed a folder of .bas files and told to “just migrate it to Python.” You need a controlled starting point, not a rewrite from scratch.

“I want a diff I can review, not a black box that might have silently changed the business logic.”

🏢

IT Manager / Tech Lead

Reducing VBA dependency

You're under pressure to reduce Excel VBA risk across the org. You need an auditable, repeatable process — not a one-off script that only one person understands.

“We need a process our auditors can look at. Not just ‘we pasted it into ChatGPT and it seemed to work.’”

Run your first
free audit.

Paste any VBA macro. Get a compatibility report, risk flags, and a reviewable Python draft — in seconds. No account. No credit card. No surprises.

Check Compatibility Free Audit What it converts →

No account needed · In-memory processing · Results in seconds

Turn messy legacy VBAinto reviewable Python.