DataFrog Tools icon
DataFrog Tools icon

DataFrog Tools

DataFrog.tools is a free, browser-based data intelligence workspace. Inspect, analyze, validate, compare, clean, and visualize CSV, JSON, Excel, XML, YAML, and SQL data — 100% locally, with no uploads, sign-up, or server involved.

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Cost / License

  • Free
  • Proprietary

Platforms

  • Online  Works directly in your browser, no signup, no fees, no backend processing. Your data never leaves your device.
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Features

  1.  Data Cleansing
  2.  Data visualization
  3.  Data Preparation
  4.  Browser-based

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What is DataFrog Tools?

DataFrog.tools is a free, privacy-first data intelligence workspace that runs entirely inside your browser. It brings together utilities across six categories — Inspect, Analyze, Validate, Compare, Clean, and Visualize — for working with CSV, JSON, Excel, XML, YAML, and SQL data. Every transformation happens locally in your browser's JavaScript engine: no files are ever uploaded, no server processes your data, no account is required, and tools keep working offline once a page has loaded.

Whether you're debugging an API response, auditing a messy spreadsheet, checking a JSON Schema, or diffing two versions of a config file, DataFrog.tools gives you a dedicated tool for it — without the risk of pasting sensitive data into a third-party server.

Tools by category:

Inspect: JSON Viewer, CSV Viewer, XML Viewer, YAML Viewer, Excel Viewer, Data Dictionary Generator, and more — interactive tree views, multi-sheet inspection, path finders, and depth metrics. Analyze: Statistical summaries (mean, median, min, max, sum), missing-value ratios, data type distributions, column profiling, and web server log audits. Validate: JSON, XML, CSV, and YAML syntax validation with exact line/column error pointers, plus JSON Schema verification (Draft-04, Draft-07, 2020-12) and a SQL Validator for DDL/DML linting across dialects. Compare: Side-by-side and inline diffing for Text, JSON, CSV, XML, and Excel, with key-path tracing, added/deleted row detection, and exportable diff reports. Clean: Excel and CSV deduplication by column or full row, whitespace normalization, casing standardization, and record filtering. Visualize: Turn JSON, CSV, XML, Excel, and YAML into interactive node trees, searchable tables, and charts (bar, line, pie, doughnut).

Key features:

100% browser-based — no backend, no external compute Zero data uploads; files are read directly into browser memory No sign-up or account required, completely free Works offline after first page load Regularly updated with new tools and blog content on data engineering topics