Artifacts

Convert JSON text into YAML.

Paste JSON and browse it as a collapsible tree in a readable layout.

Generate realistic fake rows in CSV, JSON, SQL or Excel formats from a field schema.

Online MySQL editor to write and run queries.

Online PostgreSQL editor to write and run queries.

Online SQLite editor to write and run queries.

Collection of single-purpose CSV utilities to convert, swap columns, extract and replace data.

Collection of simple JSON utilities that run in the browser.

Parse YAML and display the equivalent JSON structure.

Online SQL editor that lets you run queries against example tables.

Generates a list of random numbers inside a range, with or without duplicates, for raffles or games.

Generates random calendar dates within a chosen date range using true randomness.

Generates random clock times between two limits, in 12 or 24 hour form, from true randomness.

Creates several sets of unique random integers in one go, handy for drawing teams or sample groups.

Online SQL editor for SQL Server, MySQL, MariaDB, PostgreSQL and SQLite with AI help.

Browser SQL editor covering SQLite, DuckDB, PGlite, MySQL, PostgreSQL and SQL Server, no registration to start.

Free tool for testing SQL queries on sample schemas.

Browser SQL playground to run, format and share queries.

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.