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How Do You Convert an Excel Spreadsheet Into a Web Application?

By the YittBox team · June 30, 2026

Tips and Guides

If a spreadsheet has quietly become the system your business runs on, the good news is you don't have to start over. Here's how turning it into a web application actually works.

How do you convert Excel to a web application?

You move the same logic into a web app backed by a real database. We review your workbook — formulas, macros and VBA, and how it's structured — then rebuild it as a multi-user app that keeps your calculations, migrate your data across, and you validate everything before go-live. The result does what your spreadsheet did, just somewhere it can scale. See how the conversion works.

Do we keep our formulas and macros?

Yes. The logic your team relies on is preserved — and often tightened up along the way. Macros become proper, reliable app actions instead of brittle scripts.

Can we keep using the spreadsheet during the switch?

Yes. We run the old and new side by side (a parallel run), and you only cut over once you've signed off. No downtime, no leap of faith.

What do we gain?

Multiple people working at once with no version chaos, automatic backups, validated inputs that stop bad data at the door, and access from any device. Want to see what it would take? Send us your workbook for a free review, or get an instant ballpark with our estimator. We've done this across many industries.

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