inspector.einfachhost.de 100% in your browser — nothing is uploaded
// data inspector

Point it at a file.
Get the full picture.

Instant profiling for CSV, Parquet and Excel: types, keys, null maps, quality findings, a SQL workbench and ready-to-run CREATE TABLE DDL. Everything runs client-side — the file never leaves this tab.

Drop a data file — or browse
.csv.tsv.txt .parquet.xlsx
Orders: 1,340 deliberately messy rows — every quality finding fires. Enrollments: 980 tidy rows with a unique ID column and a student + course + semester combination to verify in the composite key tester.
▸ Manual import options (auto-detection handles most files)

Private by construction

Profiling runs on DuckDB compiled to WebAssembly, inside this tab. There is no backend and no upload endpoint — pull the network cable after the page loads and everything still works.

Forgiving ingestion

Exotic delimiters, Windows-1252 mojibake, banner lines above the header, malformed rows — auto-handled, and every decision is listed in “How this file was read”.

Real SQL, real DDL

A full DuckDB SQL workbench against your file, plus generated CREATE TABLE statements for SQL Server and Postgres — with verified primary keys.

01

Overview

How this file was read — every automatic decision, nothing silent

    02

    Columns

    click a row for top values & detail stats
    Column Type Nulls Null % Distinct Uniqueness Min → Max Badges

    Composite key tester

    Pick two or more columns and verify whether the combination uniquely identifies every row. Verified combinations become primary-key options in the DDL generator.

    03

    SQL workbench

    full DuckDB SQL against table data · Ctrl/⌘+Enter to run
    04

    Data quality

    05

    DDL generator

    CREATE TABLE from the inferred schema 
    
      
    
    
  
    

  
    
    
    
      
    
        06
    Export
    
        Markdown data dictionary — overview, columns, findings, DDL
      
    
      
    
        
        
      
    
      
    
    
    
  
    


    


  
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    This workbook has multiple sheets — which one should be profiled?