Data Profiler

Understand your datasets instantly. ChatDB profiles CSV, Parquet, and JSON files directly in the browser, surfacing missing values, distributions, and the most common entries — no uploads required.

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Quick Start

  1. 1
    Upload a file

    Drag and drop or browse for a CSV, Parquet, or JSON file.

  2. 2
    View the profile

    Instantly see column stats, null percentages, ranges, and top values.

  3. 3
    Export results

    Download the profile as JSON or Markdown for sharing with your team.

Specs

Formats
CSV, Parquet, JSON
Processing
100% client-side
Export
JSON & Markdown

Data stays on your device

All processing runs locally in your browser. Nothing is sent to any server.

A quick profile reveals hidden quality issues before you build dashboards, train models, or ship data pipelines. Catch missing values, unexpected formats, and skewed distributions early.

3

Supported Formats

Client-side

Processing

JSON & Markdown

Export Formats

Null & Missing Values

See null counts and missing-value percentages per column at a glance.

Distinct Values

Spot duplicates quickly with distinct value counts for every column.

Numeric Ranges

Get min, max, and average values for all numeric fields.

Top Values

View top values and distributions for a fast sense check of your data.

Downloadable Reports

Export profiles as JSON and Markdown reports for sharing with your team.

What file formats are supported?

The Data Profiler supports CSV, Parquet, and JSON files. All processing happens locally in your browser.

Is my data uploaded to a server?

No. Everything runs client-side in your browser. Your files never leave your device.

What stats are included in a profile?

Each column profile includes null counts, missing-value percentages, distinct value counts, min/max/average for numeric fields, and top values with distributions.

Why profile your data first?

A quick profile reveals hidden quality issues before you build dashboards, train models, or ship data pipelines. Catch missing values, unexpected formats, and skewed distributions early.

What you get in a profile

  • Null counts and missing-value percentages per column.
  • Distinct value counts to spot duplicates quickly.
  • Min, max, and average values for numeric fields.
  • Top values and distributions for a fast sense check.
  • Downloadable JSON and Markdown reports for sharing.

Related Tools

CSV Editor

Clean, filter, and export CSVs locally in the browser.

Parquet Reader

Explore Parquet datasets with fast, in-browser previews.

JSON Formatter

Validate and format JSON before exporting or sharing.