CleanSample
Response-quality screening that shows its working
Every flag arrives with the row, the columns and the numbers behind it, so you can check it against your own file in seconds. Nothing is uploaded — the file is read here, in this tab.
Drop a CSV here · Qualtrics · SurveyMonkey · Google Forms · Prolific · plain CSV
A flag per respondent per rule, each carrying the row number, the columns involved and the numbers that crossed the threshold. Nine rules: attention checks you designate, longstring runs, low response variability, speeders, page timing, duplicate and near-duplicate identifiers, repeated open-ends, and multivariate answer patterns.
It will not tell you a respondent is fraudulent, inattentive or machine-written. Those are conclusions about a person, and the file cannot support them. It reports what is in the data and leaves the decision where it belongs.
Nowhere. Parsing and analysis run in this tab; there is no upload, no account and no server that ever sees a response. The only request this site can make on your behalf is a licence check, and it carries a key and nothing else — the detail. Free for the first 300 respondents of a file, with every rule, all the evidence and the full export; €9 per month lifts the limit and changes nothing else.