Paste a draft into a word counter when you need an approximate reading length or an essay target. Use a character counter when a field has a strict limit. Check whether the receiving platform counts spaces, line breaks, emoji, or bytes differently.
Reading-time estimates are rough because text complexity and audience vary. Use the count to guide editing, then read the actual text for clarity. For a hard form limit, paste the final version into the destination and verify it fits there.
Counting is a measurement, not an edit.