2026-07-23
What Actually Happens to Your File When You Use an Online Excel Tool
Not all 'online tools' work the same way underneath. Here's what actually happens to your file, tool by tool.
When you drop a file into a web-based tool, there are really only two things that can happen to it: it gets processed on your own device, or it gets sent somewhere else to be processed. The difference matters a lot for sensitive data, and most tools don't make it obvious which one you're getting.
Client-side vs. server-side, plainly
Client-side processing means the work happens in your browser, using your device's own processing power — the file itself never leaves your computer. Server-side processing means the file is uploaded somewhere else — a server, and sometimes a third-party AI provider — to be read or transformed, then a result is sent back.
Neither approach is inherently bad, but they're not interchangeable for sensitive files, and a tool that doesn't disclose which one it's using is worth being cautious about.
How RowMint actually handles each type
Most RowMint tools — merging, cleaning, comparing, converting between Excel/CSV/JSON — run entirely client-side. Your file is read and transformed in your browser's memory and never touches our servers.
The exception is the four tools that read photos or scans — Image to Excel, Invoice to Excel, Scanned PDF to Excel, and Bank Statement to Excel. These genuinely need OCR, which can't run meaningfully in a browser, so the file is sent to our server and then to Fal.ai for reading. Nothing is written to storage at any point in that pipeline — it's processed in memory for that one request and then discarded. Each of these tools shows an explicit consent notice before your first upload, specifically because it's the one case where this is happening.
Questions worth asking any online file tool
Does it say where the file is processed? Does it disclose if a third-party provider is involved? Is there a retention window, or is the file stored indefinitely? A tool that answers these clearly is generally more trustworthy than one that just says 'secure' without explaining what that means.
Tools used in this guide
FAQ
Does RowMint train AI models on my files?
No. Files are never used to train any model — this applies to every tool, including the OCR tools that use Fal.ai.
What happens to files sent to the OCR tools specifically?
They're converted in memory, sent to Fal.ai (and, for structured extraction, to a language model) for that single request, and never written to any storage afterward.
Do I need an account to use these tools?
No — none of RowMint's tools require an account. An account only matters if you want to save files to your dashboard for later.