Free online data tools

Converts tables between 30+ formats such as Excel, CSV, JSON, Markdown and SQL.

Build LaTeX tables visually with merged cells and borders, or paste from a spreadsheet.

Edit a table visually and copy it out as a Markdown table.

Beautify and validate XML documents.

Format and validate YAML documents.

Loads a .parquet file with DuckDB-Wasm so you can browse rows, see column types, query it in SQL and save a CSV or JSON copy.

Turns a JSON sample into SQL CREATE TABLE statements.

Treats an uploaded CSV as a database table so you can filter and aggregate it with SELECT statements.

Opens an Avro file and displays its records and schema.

Compares two CSV files and highlights changed rows and cells.

Edits CSV in a spreadsheet-style grid in the browser.

Generates random CSV rows with chosen column types for testing.

Splits a large CSV into smaller files by row count.

Checks CSV for consistent columns, quoting and encoding problems.

Combines several CSV files into one.

Converts a Parquet file to CSV.

Opens a Parquet file and shows its rows and schema in the browser.

Generates random JSON documents from a template.

Generates random XML test documents.

Runs SQL against an SQLite database in the browser.

Scores how well a text fits categories that you define, without any training.

Animated k-means run on a random point set, with data reset and speed control until the clusters converge.

Search for datasets that a language model generates on request, and save the ones you want.

Ultra-compact multilingual embedding model that runs in the browser for similarity search.