What is reject input in Google Sheets?
Reject Input controls what people can type in a cell: dropdowns, checkboxes, chips, warnings, or reject rules. Validation reduces bad data before it breaks formulas downstream.
When to use it
Use validation when many people edit the same input columns and you need consistent entries.
When to skip it
Skip complex validation when a form, script, or single-editor workflow already guarantees clean input.
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Rejection!
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dropdowns / data validation
Data validation restricts what people can type in a cell. A dropdown is the friendly face of that feature: pick from a list instead of free text. It keeps statuses, categories, and owners consistent so filters, pivot tables, and scripts do not break on typos.
Read guide →Data validation
Data validation restricts what can be entered in a cell before bad data spreads through your model. Rules can enforce dropdown lists, number ranges, dates, text length, or custom formulas that return TRUE. Invalid entries can be rejected or warned with a note. Validation is the front door quality check for shared trackers and intake sheets.
Read guide →Checkbox
A checkbox is a cell control that stores TRUE when checked and FALSE when unchecked. Insert checkboxes from Insert > Checkbox or data validation. They power task lists, approval flags, and conditional formulas without typing yes or no by hand.
Read guide →Chip
Chips are visual tokens in a cell that represent a chosen value from a list or a person from your organization. Dropdown chips show colored pills for categories and statuses. People chips link to Google contacts for assignees and reviewers. They keep typed data consistent while looking clearer than plain text.
Read guide →Done reading about reject input?
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