Free Tool
Schema Profiler
Get a structural profile of a flat CSV dataset. See inferred column types, nullability, uniqueness, candidate single-column keys, constant or near-constant columns, mixed-type warnings, and potential formatting inconsistencies. All findings are labelled as candidates or warnings — not confirmed facts.
Files never uploaded
Candidates and warnings only
Downloadable CSV output
Your data never leaves your browser. Schema profiling is done locally using JavaScript. No files are uploaded, stored, or transmitted.
Drop your CSV here, or click to browse
Accepts .csv, .tsv, and .txt files. Processing stays on your device.
CSVTSVTXT
Profiling schema…