Data cleaning, by topic
Each topic is a hub: it brings together the tool, the step-by-step guides, and the real-world use cases for one kind of data cleaning. Start with the topic that matches your task.
Removing duplicate data
Everything about finding and removing duplicate rows from spreadsheets and lists.
5 resources →Formatting phone numbers
Standardize messy phone numbers to the E.164 international format for CRMs and SMS tools.
4 resources →Cleaning email lists
Trim, lowercase, validate, and dedupe email columns before importing or sending.
3 resources →Splitting & parsing names
Break a full-name column into first, middle, and last name fields — including the tricky cases.
3 resources →