Zarvis Data Analyzer is a lightning-fast, enterprise-grade SaaS analyzer that runs entirely in your browser. Upload a file, explore interactive charts, and export a polished PDF report. No sign-up. Nothing ever leaves your device.
Supported: CSV • XLSX • JSON • TSV — up to 25 MB. Nothing is uploaded to any server — your file is parsed on your device.
Everything is processed locally in your browser — zero uploads.
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Built for analysts, students, founders, and journalists who value speed and privacy.
Every byte of your data stays inside your browser tab. We do not run a backend, we do not use trackers on the tool page.
CSV, TSV, JSON and Excel .xlsx / .xls — all parsed with battle-tested libraries (PapaParse & SheetJS).
Bar, Line, Pie and Doughnut. Choose any X/Y columns. Charts re-render instantly — no reload, no lag.
One click gives you a beautifully typeset, brand-ready PDF report with KPIs, tables and charts.
Optimized parsing and virtualized rendering handle datasets with hundreds of thousands of cells smoothly.
Mean, median, mode, standard deviation, min, max, unique counts and distribution — all detected automatically.
Drag any CSV, XLSX, JSON or TSV into the analyzer, or click to browse from your device.
Pick columns, switch chart types, search & sort the data table. Statistics update in real-time.
Click Export PDF to get a polished, ready-to-share document with charts, KPIs and the full data table.
No. The tool is 100% client-side JavaScript. Your file is parsed in memory in your browser and is never transmitted.
25 MB by default. Very large XLSX may be slower because of complex sheet structures.
Latest Chrome, Edge, Firefox, Safari, Brave and Opera. Not supported on IE11.
No sign-up, no email, no cookies for the tool. Free forever.
Yes. Zarvis Data Analyzer is free for personal & commercial use, subject to the Terms.
Zarvis is built by Harsh Kardam, an independent developer & SaaS creator based in India.