Analyze and Forecast CSV Data Online

Upload a CSV or TSV file to explore summary statistics, detect outliers, visualize trends, and generate a lightweight forecast — all in your browser.

  • Runs locally in your browser
  • No signup required
  • Free for small datasets
Drop your CSV or TSV file here
Up to 5 MB · 20,000 rows · 50 columns — processed locally

Your file is processed locally and is never uploaded to our servers.

How it works

  1. 1

    Bring your data

    Drag in a CSV/TSV file, pick one, paste text, or load the synthetic sample. Everything stays in your browser.

  2. 2

    Configure & analyze

    Choose a value column and an optional date column. DataInsight computes statistics, quality metrics, outliers and a forecast instantly.

  3. 3

    Review & download

    Read the charts and tables, then export the forecast as a CSV you can open in any spreadsheet.

What you can learn from your data

A few everyday use cases that fit the MVP:

  • Daily store ordersTrend & weekend lift
  • Website signupsGrowth & anomalies
  • Energy usageSeasonal patterns
  • Inventory levelsStock-out signals
  • Foot trafficPeak-day detection
  • Any ordered numbersBaseline forecast

DataInsight is a general analysis helper. It does not provide financial, investment, or trading advice.

Private by design

Your file is parsed and analyzed entirely on your device. There is no account, no database, and no third-party analytics or ad script on this page. Read the privacy page.

Frequently asked questions

Is my CSV data uploaded?

No. Your file is parsed and analyzed entirely in your browser. Nothing you upload ever leaves your device. The only network request is the optional “Try sample data” button, which fetches a public demo file.

What file formats are supported?

CSV, TSV and plain-text files up to 5 MB, 20,000 rows and 50 columns. Common delimiters (comma, tab, semicolon) are detected automatically.

How does the forecast work?

DataInsight fits simple, transparent models — a naive baseline, a linear trend, and an optional seasonal adjustment — then picks the one with the lowest hold-out validation error. This is a statistical baseline, not a predictive AI.

Is the forecast guaranteed to be accurate?

No. The hold-out MAE shown in the results reflects past validation error only. Real-world data can behave differently, so treat the forecast as a directional guide rather than a guarantee.

Can I use the tool without a date column?

Yes. Without a date column, values are analyzed in row order as Period 1, Period 2, … and forecast as an ordered sequence.

What happens to missing values?

Missing values are reported in the data-quality panel and linearly interpolated for modeling only. Your original data is never modified or sent anywhere.

Is DataInsight free?

Yes. The MVP is free, requires no signup, and runs entirely in your browser without an account.