UTILS

Free online tools to generate, calculate,
convert, format, encode, and play.

Data Utils

Data manipulation and analysis tools. Transform, filter, deduplicate, and generate data in CSV, JSON, and other formats — all client-side.

chart builder. Paste CSV or table data, pick a chart type (bar, line, pie, scatter, area), customize colors and labels, and export as PNG or SVG.

CSV Import Validator

free online CSV validator. Upload a CSV file, map columns to expected fields, validate data types and formats, highlight errors...

Duplicate Finder

Detect duplicate rows, find near-matches, and analyze data quality. Supports column selection, case-insensitive matching, and export of results.

Upload .xlsx or .xls files and instantly convert spreadsheet data to JSON format.

Fake Data Generator

advanced fake data generator. Build custom tables of realistic test data — names, addresses, companies, transactions, and products — with locale selection,...

JSON repair tool. Paste broken or malformed JSON from LLM output, logs, or APIs and auto-fix trailing commas, single quotes, unquoted keys, comments, and...

Create realistic fake JSON data for testing and development. Generate names, emails, addresses, dates, UUIDs, and more — entirely in your browser.

Parquet File Viewer

Apache Parquet file viewer. Drag in a .parquet file to inspect its schema and browse the data as a sortable, paginated table.

Spreadsheet Editor

lightweight in-browser spreadsheet editor. Enter data, use formulas like SUM, AVG and IF, sort and filter columns, then export to CSV or XLSX. Runs entirely...

SQL Query Builder

Build SELECT, INSERT, UPDATE, and DELETE queries with a point-and-click interface. No SQL knowledge required.

Table Formatter

Paste tabular data and convert between CSV, TSV, Markdown, JSON, HTML table, and ASCII table formats.

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