Belton Creative
CSV · in browser
CSV profiler
Column types, null rates, unique counts, and dirty data flags before you load a file into Excel, SQL, or Power BI.
Open CSV profilerFree tools · Charles Belton, BA/BI · Brunswick, ME
Free tools
Check a spreadsheet or read a query in the browser. Files and SQL stay on this device.
SQL · in browser
SQL formatter
Pretty-print PostgreSQL, T-SQL, or MySQL and get a plain-English sketch of tables, joins, and filters.
Open SQL formatterFAQ
Do these tools send my data to a server?
No. The CSV profiler and SQL formatter both run in this browser. Nothing is uploaded.
Which one should I open first?
CSV profiler if you have a file you have not loaded yet. SQL formatter if you already have a query.
Are they free?
Yes. No account. Built by Charles Belton in Brunswick, ME.
Need this as a recurring report?
If cleanup or a weekly refresh is eating the team, write me. I answer my own email.