How it works
- Input. Paste your content or drop a supported file.
- Options. Adjust the options for the result you need.
- Process. Run the tool, then copy or download the result.
Clean lists
Check list lines
Count empty lines, duplicate entries and unique values. This does not validate formats.
TXT, CSV, TSV, JSON or MD · UTF-8 · up to 10 MiB. Each input, including files: up to 500,000 code points.
0 characters0 lines
0 characters
Clean lists
How it works: Check list lines
Run a quick quality check on a pasted column or list. See blank rows, repeated values and the number of unique records before importing or analyzing the data.
Input → Result
Input
Alice Bruno Alice
Result
Rows: 4 Non-empty: 3 Blank: 1 Duplicates: 1 Unique: 2
Common uses
- Check a source file before a merge
- Estimate cleanup work
- Verify a list after deduplication
Formats and limits
- This is a line-based count of empty, repeated and unique entries. An empty input contains zero lines.
- It does not validate email, phone, date or spreadsheet formats. Do not use physical line counts to validate CSV records with quoted line breaks.
2026-10-07