The 4 Best Excel to Web App Converters in 2026
Four tools can turn an Excel spreadsheet into a working web app automatically. We compare them on the things that decide the outcome — formula fidelity, VBA, design control, ownership and real pricing — and are honest about the cases where no converter is the right buy.
The short answer: SpreadsheetWeb is the most capable Excel to web app converter (the fullest formula engine, a real free tier); Appizy is the cheapest way to get a calculator online; Sheetcast keeps Excel itself as the engine; Molnify suits one high-value internal app with unlimited users. None of them run VBA, none give you design freedom, and none let you own the result — which is why we also cover when a converter is the wrong tool entirely.
How we judged them
Five criteria, in the order they actually sink projects: formula fidelity (does your workbook calculate correctly after conversion?), VBA support (spoiler: universal no), design control (does the result look like your product or like a generated form?), ownership (what happens when you stop paying?), and price transparency. We build spreadsheet conversions for a living — custom development is our product, and it appears here only after the four converters, clearly labeled. Where a converter is the smarter buy, we say so.
1. SpreadsheetWeb — the most capable converter
SpreadsheetWeb runs the most complete Excel calculation engine of any converter — around 501 functions, executed server-side, so a formula-heavy workbook usually calculates correctly after conversion. It is also the only converter here with a genuine free-forever tier: one application, a 0.5 MB workbook, 300 sessions a month. Paid plans are $30/month (Basic, billed annually; $36 month-to-month) and $100/month (Pro), with the same engine at every tier — plans change capacity, not correctness.
Where it stops: the free tier's 0.5 MB cap rules out most real workbooks; Solver, Goal Seek and Power Query need private-cloud licensing; the generated interface is a clean but unmistakable form; and the app lives on their platform for as long as you subscribe. Best for: formula-heavy internal tools where correctness matters more than branding.
2. Appizy — the fastest and cheapest
Appizy is upload-and-go: drop an .xlsx file, get a working web calculator in minutes. At $9/month (10 calculators), $15/month, or $45/month (100 calculators), it is the cheapest serious option, and calculations run server-side so visitors never see your formulas. Charts convert too.
Where it stops: there is no permanent free plan (trial only); complex workbooks — macros, pivot tables, long multi-sheet dependency chains — convert partially or not at all; and the interface is arranged from your grid, which reads as generated. Best for: simple, self-contained calculators you need shared today on a small budget.
3. Sheetcast — best for staying inside Excel
Sheetcast takes a different approach: it is an Excel add-in, and Excel itself remains the calculation engine — so anything your workbook computes, the web app computes. It is free for one user with unlimited anonymous visitors, then priced unusually: about $10/month per column (or per-user pricing on request), with unlimited pages, apps and rows.
Where it stops: the per-column model makes costs hard to predict as an app grows; you are tied to the Microsoft ecosystem; and VBA still does not run on the published web app. Best for: Excel power users who want to publish from inside Excel and start free. We compare it in depth in our Sheetcast alternatives guide.
4. Molnify — one big app, unlimited users
Molnify prices per application rather than per user: €99/month (Essential) to €200–300+/month (Standard/Premium, adding JavaScript, integrations, custom styling and add-ons), every plan with unlimited users. For one high-stakes internal tool used by a large team, that inversion can be the cheapest seat math on this page.
Where it stops: per-app pricing makes it the most expensive way to run several tools; there is no free tier (14-day trial); and the same converter ceilings apply — no VBA, generated interface, platform dependency. Best for: a single business-critical calculator with a big audience and a real budget.
Side by side
| Converter | Pricing (from) | Free tier | Formula engine | VBA | Own the result |
|---|---|---|---|---|---|
| SpreadsheetWeb | $30/mo (annual) | Yes — 1 small app | ~501 functions, server-side | No | No |
| Appizy | $9/mo | Trial only | Common functions, server-side | No | No |
| Sheetcast | Free (1 user); ~$10/mo per column | Yes — 1 user | Excel itself | No | No |
| Molnify | €99/app/mo | Trial only | 200+ functions | No | No |
| Custom development (what we do) | $500–$5,000 one-time | Free quote | Exact replication, verified | Converted to JS | Yes — source code |
Vendor pricing is published starting pricing, verified on each vendor's site in August 2026 — check their pricing pages for current plans.
ExcelToWeb.app is an independent development service. All product names and trademarks are the property of their respective owners; we are not affiliated with or endorsed by any tool compared here.
What none of the converters can do
The four tools above share the same three ceilings, because they are structural, not feature gaps. No VBA: macro logic does not survive any automatic conversion — it has to be rewritten, which is a development task whoever does it. No design freedom: a generated interface always reads as a generated interface; if the tool is client-facing, that is your brand. No ownership: stop paying and the app is gone, and your formulas live on someone else's platform meanwhile.
If one of those three is a dealbreaker, the alternative is converting the spreadsheet to code: every formula and macro translated to JavaScript, verified side by side against the original, in an interface designed for your users — delivered as source code you own for a one-time fee. That is our service, and our complete conversion guide compares both routes without the sales pitch. For the wider landscape beyond converters — no-code builders, Power Apps, database platforms — see every way to turn a spreadsheet into an app.
Frequently asked questions
What is the best Excel to web app converter?
For most spreadsheets, SpreadsheetWeb — it runs the most complete Excel calculation engine of any converter (around 501 functions) and has a genuine free tier. Appizy is the best budget pick at $9/month, and Sheetcast is best if you want Excel itself to stay the engine. If your workbook has VBA macros, needs your branding, or the formulas are your business asset, no converter fits — that is when custom conversion to code you own makes sense.
Can I convert Excel to a web app for free?
Partly. SpreadsheetWeb has a free-forever tier (one app, 0.5 MB workbook, 300 sessions/month), Sheetcast is free for a single user, and Excel for the web can embed a workbook on any page via OneDrive. All free routes stop at the same walls: small size limits, generated design, no VBA, and your formulas travel with the platform or the file.
Do any Excel to web app converters run VBA macros?
No. None of the four converters here — or any converter we know of — executes VBA on the web. Macro logic has to be rebuilt: either in Office Scripts inside Microsoft 365, or translated to JavaScript in a custom conversion, which is how a macro-driven workbook usually becomes a web app.
When is custom development better than a converter?
When the tool is client-facing, the formulas are the product, or the spreadsheet uses VBA. A converter generates its own interface on its own platform for a subscription; custom development translates your exact logic into verified JavaScript, wraps it in your branding, and hands you the source code for a one-time $500–$5,000. For a tool your business depends on, the one-time cost usually beats years of per-user or per-app fees.
Comparing a specific tool? See our takes on Sheetcast, Glide, Caspio, Knack, ConvertCalculator, and Trunao.
Not Sure a Converter Will Handle Your Spreadsheet?
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