Toolkit
Online CSV Tools
Data File Tool offers 17 free browser-based CSV tools for data quality — validation, health scoring, cleaning, comparison, splitting, merging, and conversion. Every tool runs locally with Health Score diagnostics.
CSV Health Score
Get a 0–100 CSV health score with A–F grade, issue breakdown, and actionable recommendations.
CSV Validator
Validate CSV structure, encoding, delimiters, and column consistency instantly.
CSV Compare
Compare two CSV files and find added, removed, and changed rows.
CSV Cleaner
Trim whitespace, remove empty rows, deduplicate, and normalize line endings.
CSV to JSON
Convert CSV files to JSON arrays or keyed objects.
CSV Duplicate Finder
Find duplicate rows or key-column duplicates in CSV data.
CSV Splitter
Split CSV files by row count or by unique column values.
CSV Merger
Merge multiple CSV files with header union and row append.
CSV Sorter
Sort CSV rows by any column ascending or descending.
CSV Deduplicator
Remove duplicate rows from CSV, optionally by key column.
CSV Column Extractor
Select and extract specific columns from a CSV file.
CSV Column Renamer
Rename CSV column headers with a mapping.
CSV Row Filter
Filter CSV rows by column condition.
CSV Transpose
Transpose CSV rows and columns.
CSV Quote Fixer
Fix malformed quoting and escaping in CSV files.
CSV Delimiter Check
Detect delimiter, encoding issues, and structural problems in CSV files.
CSV BOM Remover
Remove UTF-8 BOM and clean CSV for import.