18 free tools,
no signup
Calculators and generators for the maths that comes up around surveys and forms. Everything runs in your browser — nothing is uploaded, and none of it needs an account.
Survey metrics
Net Promoter Score with a confidence interval.
Employee NPS, with small-team confidence bands.
Customer satisfaction score from your raw counts.
Customer Effort Score from a 1–7 scale.
The Sean Ellis 40% test, with error bars.
Statistics
How many responses you actually need.
How much your result could be off by.
The range your result really sits in.
Is that difference real, or noise?
Mean, median, and top-box, side by side.
Form performance
Marketing
Tagged campaign URLs, built correctly.
Static QR codes that never expire.
A printable QR code for any Google Form.
A printable QR code for any Typeform.
A printable QR code for Microsoft Forms.
Better forms.
Better data.
Build your first form in under 60 seconds. Free forever for personal use, no credit card required.