Instant file merging for messy spreadsheets. No formulas. No crashes.
Select 2 CSV files (max 5MB each).
Load 2 source tables to enable Merge.
Excel crashes on massive datasets. We handle millions of rows instantly.
Stop Googling INDEX/MATCH syntax. Just tell the AI what to connect.
Perfect for matching payments to invoices, merging CRM exports, or reconciling e-commerce orders.
TenMil uses WebAssembly (WASM) to process your files locally without ever uploading them to an external server. It looks and acts like a normal website, but the database runs transparently right here on your browser. You get instant results without compromising company privacy or waiting for files to upload to the cloud. When you close this tab, your data is deleted forever.
Large Language Models are great at translating plain English, but terrible at exact calculations. We never let AI touch your actual data. TenMil uses AI solely to write the SQL query, which is then executed strictly and predictably by the DuckDB engine to guarantee zero hallucinations.