Line Counter
Result
| Total lines | ||
|---|---|---|
| Non-empty lines | ||
| Empty lines |
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Line Counter — How Many Lines, Really?
"The export should have 5,000 rows" — does it? "How many ERROR lines in this log?" "How many items on this list after removing blanks?" Line counts answer data-integrity questions constantly, and this free counter answers instantly: total, non-empty, unique, and duplicate line counts plus length extremes, with keyword filtering. In-browser, no signup.
The Four Counts and When Each Matters
| Count | Question it answers |
|---|---|
| Total lines | Does the file match the expected row count? |
| Non-empty lines | How many actual items/records exist? |
| Unique lines | How many distinct values after dedupe? |
| Duplicates | How dirty is the data? (total − unique) |
The gap between counts is often the insight: 5,000 total but 4,700 unique means 300 duplicate rows to investigate before import.
The Off-By-One Everyone Hits
Unix wc -l counts newline characters, so a file without a trailing newline reports one fewer than the visible lines; editors count displayed lines. When your count disagrees with a colleague's by exactly one, the trailing newline is almost always the culprit — this counter shows both figures so reconciliation is instant.
Filtered Counting for Logs
Paste a log excerpt and count lines containing ERROR, then WARN, then a specific request ID — three pastes replace writing grep pipelines, and the technique works identically on CSV exports (count lines containing a customer ID) and code (count TODO comments).
Free and Instant
Massive texts count locally in milliseconds — no upload, no account, no limits. Pair with our word frequency counter and character counter for a complete text profile.