Free data engineering tools. In your browser.
Format SQL, convert and profile CSV, JSON, YAML and XML, diff table schemas, and generate test data. Your data never leaves your device.
Data engineering tools
Built for analytics engineers, data engineers, and SQL practitioners.
SQL Formatter
Beautify SQL queries across MySQL, PostgreSQL, BigQuery, Snowflake, and more.
CSV / JSON / YAML / XML Converter
Convert between CSV, JSON, YAML, and XML with schema-aware previews.
Schema Diff Tool
Compare CREATE TABLE definitions and export migration-ready diffs.
Parquet Viewer
Open Parquet files in your browser: page through rows, filter, and see exact decimals and timestamps.
Parquet to CSV Converter
Convert Parquet to CSV in your browser with row scope, delimiter, NULL and nested-column options.
Parquet to JSON Converter
Convert Parquet to a JSON array or JSON Lines in your browser, keeping nested data and exact numbers.
Parquet Schema Viewer
Inspect a Parquet file's schema, row groups, compression and stored statistics in your browser.
Mock Data Generator
Generate reproducible fake datasets as JSON, CSV, SQL INSERTs, or YAML.
SQL Query Complexity Analyser
Estimate joins, CTE depth, subqueries, and complexity hotspots in SQL queries.
Markdown to HTML
Write Markdown in a split-pane editor and copy clean HTML output.
More tools in DevToolBox
JSON, regex, timestamps, cron, JWT and more run in DevToolBox, our sister workbench.
JSON Formatter + Validator
Pretty-print, validate, diff, query, and convert JSON in your browser.
Regex Tester
Test regex live with group highlighting, replacements, and cheatsheets.
Epoch / Unix Timestamp Converter
Convert Unix timestamps to dates across timezones and back again.
Cron Expression Builder
Generate, validate, and preview cron expressions across multiple runtimes.
JWT Decoder
Decode JWT headers and payloads locally with expiry and signature insights.
Hash Generator
Generate hashes and HMAC values for text and files in your browser.
Base64 Encoder / Decoder
Encode, decode, preview files, and work with URL-safe Base64 values.
YAML Validator + Formatter
Validate, format, and convert YAML to JSON or TOML in your browser.
In development
AI-assisted SQL, dbt, and lakehouse tools.
SQL AI Explainer
Paste a SQL query and get a concise plain-English explanation plus performance notes.
dbt Model Generator
Generate dbt models, tests, schema.yml, and sources.yml from raw SQL or DDL.
Fabric Lakehouse Schema Designer
Design Fabric Lakehouse schemas visually and export Spark, Delta, and dbt artifacts.
dbt Lineage Visualizer
Upload a dbt manifest.json and explore your DAG in an interactive lineage graph.
SQL to PySpark Translator
Translate SQL queries into PySpark DataFrame API with explanations.