View, query & convert Parquet, CSV & JSON in your browser.
Open, SQL-query, profile and convert Parquet, Avro, CSV, JSON, Excel & XML — entirely in your browser, nothing uploaded.
Drop a file or click to browse
Parquet, Avro, CSV, TSV, JSON, JSONL, XML, Excel — processed locally, never uploaded
Parsed in-browser
Files are read and queried by DuckDB compiled to WebAssembly — there’s no server that receives your bytes.
Off the main thread
All parsing, SQL and conversion run in a Web Worker on your device, so the UI stays responsive on big files.
Nothing uploaded
Exports are generated locally and downloaded straight to your machine. Only metadata — never rows — is ever handled.
The toolkit
10 toolsExplorer
Upload, preview & query files with SQL.
Converter
Convert between Parquet, CSV, JSON, Excel & more — no SQL needed.
Schema diff
Compare two files’ columns & types side by side.
Data profile
Per-column null %, distinct counts, min/max & median.
Open from URL
Load a Parquet or CSV straight from an S3, GCS or https URL.
Parquet Inspector
Read a Parquet file's schema, row groups, compression & column stats.
Warehouse DDL
Generate Snowflake/BigQuery/Redshift CREATE TABLE & load commands.
dbt generator
Generate a dbt sources.yml, staging model & schema.yml from a schema.
File validator
Detect a CSV's delimiter, find unparseable rows & check Parquet integrity.
PII scanner
Flag emails, SSNs, credit cards & phone numbers — all in your browser.