For Developers

Stop Rewriting Excel in Code

Your spreadsheet already works. Turn it into an API in minutes — not months. Delete thousands of lines of formula translation code. Ship faster with 100% accuracy.

"Just convert this Excel to code", they said.

We've all been there. Business hands you a spreadsheet — their pricing model, financial calculator, or technical configurator. Years of refined logic in those cells.

"Can you just put this on the website?" they ask. It sounds simple. Three months later, you're still debugging why your JavaScript doesn't match Excel.

PM
Product Manager

"It's just an Excel file with some formulas. Should be quick, right?"

Dev
Developer (3 months later)

"The numbers are off by 0.3%. Finance says it's wrong. I've been debugging VLOOKUP edge cases for two weeks..."

The Hidden Complexity

Why Excel-to-Code Is Harder Than It Looks

Formula Translation

A single Excel formula becomes dozens of lines of code. VLOOKUP alone requires implementing search logic, error handling, and 1-based indexing.

Excel:
=IF(B2>1000, VLOOKUP(A2,Table,3)*0.9, VLOOKUP(A2,Table,2))
JavaScript:
// 50+ lines of code...

Hidden Dependencies

That formula references other sheets, named ranges, and external data sources. Your code needs to recreate an entire dependency graph.

  • Cross-sheet references
  • Named ranges
  • Conditional formatting logic
  • Data validation rules

Excel-Specific Functions

WORKDAY, PMT, XIRR, SUMPRODUCT... Excel has 500+ functions. Each needs a perfect JavaScript implementation.

=WORKDAY(TODAY(), 10, Holidays)
→ Weekend logic + holiday handling + date system matching

The 1000 Formulas Problem

Real business models have hundreds or thousands of interconnected formulas. Translating them all while maintaining the calculation order? Nightmare.

Real example: Real example: A pricing configurator with material costs, volume discounts, regional adjustments, shipping, tax rules, and margin calculations.

Edge Cases & Rounding

Excel handles floating point math, date boundaries, and empty cells in specific ways. Your code will be "close" but never exactly right.

"The numbers are off by 0.01% — Finance says it's wrong."

The Sync Problem

Business updates the Excel file every quarter. Now your code is outdated. Re-translate? Every. Single. Time.

The cycle: Excel changes → Code breaks → Developer fixes → Repeat forever
The Real Cost

What Excel-to-Code Actually Costs

2-6
Months
Initial implementation time
70-95%
Accuracy
Edge cases always missed
∞
Maintenance
Every Excel change = more work

What If You Didn't Have To?

The spreadsheet already works. The formulas are tested. The business trusts the numbers.

So why rewrite it?

With SpreadAPI, Excel is your calculation engine. Upload your spreadsheet, define inputs and outputs, and get an API. The original formulas run — not a translation.

100% Accuracy
Minutes, Not Months
Zero Maintenance
Before vs After
BEFORE: Translation Nightmare
// 500+ lines trying to match Excel
class PricingCalculator {
  calculatePrice(product, qty, region) {
    // Implement VLOOKUP...
    // Handle discount tiers...
    // Apply regional rules...
    // Match Excel rounding...
    // Still doesn't match exactly
  }
}
AFTER: 5 Lines, Perfect Accuracy
const price = await fetch(
  'https://spreadapi.com/api/v1/services/pricing/execute',
  { body: JSON.stringify({ product, qty, region }) }
).then(r => r.json());
Clean Architecture

Everyone Does What They're Best At

The Excel expert doesn't need to learn JavaScript. The developer doesn't need to understand the financial model. Business can update rules without a deployment.

Excel Expert

Builds and maintains the calculation model in familiar Excel

Updates pricing? Just save the spreadsheet. Done.

Frontend Developer

Consumes the API, builds the UI, focuses on user experience

No need to understand complex financial formulas.

Business Team

Updates rules anytime — no tickets, no deployments, no waiting

Change pricing in Excel → Live instantly.
Who Benefits

Built for Everyone

For Developers

  • Delete thousands of lines of formula translation code
  • Stop debugging "why doesn't this match Excel?"
  • Ship faster — hours instead of months
  • Focus on the app, not formula translation

For No-Code Builders

  • Complex calculations without writing code
  • Connect to Webflow, Bubble, Zapier via simple API
  • Build pricing calculators, configurators, quote tools
  • No developer needed for the calculation logic
Real Examples

What People Build With This

💰

Pricing Engines

Complex pricing with volume discounts, tiers, regions

🏠

Mortgage Calculators

Loan payments, amortization, what-if scenarios

⚙️

Technical Configurators

Product configs with dependencies and constraints

📊

Financial Models

NPV, IRR, cash flow projections

🚚

Shipping Calculators

Weight, zone, carrier logic combined

💼

Commission Calculators

Complex sales commission with tiers and bonuses

📐

Engineering Calcs

Material strength, load calculations, safety factors

🏷️

Quote Generators

Multi-line quotes with all business rules

Common Questions

"What about performance?"

First call: 100-200ms. Cached calls: <20ms. Accurate results are worth the minimal latency — and it's still faster than waiting 3 months for a buggy reimplementation.

"What if the Excel has errors?"

Your reimplementation would have the same errors — plus translation bugs. At least with SpreadAPI, the numbers match what business expects. Fix once in Excel, fixed everywhere.

"What about version control?"

SpreadAPI versions every upload. You can switch between versions via API parameter. Full audit trail of every change.

"Can the CFO audit it?"

Yes! They can audit the actual Excel file being used — not thousands of lines of JavaScript they don't understand. It's their spreadsheet, running live.

Ready to Stop Rewriting Excel?

Upload your spreadsheet. Get an API. Delete thousands of lines of code. It really is that simple.