📄 CSV Tools
Process and clean CSV files entirely in your browser. No installation, no uploads to any server — all processing happens locally on your device.
📄 CSV Processing Tools
11 toolsCSV Splitter
Split a large CSV into multiple smaller files by row count or file count. Each output file gets the header row automatically.
→CSV Merger
Merge multiple CSV files into one by appending rows. Match by header names or use strict mode, optionally add a source filename column, preview, and export.
→CSV Column Mapper
Reorder, rename, and exclude columns to remap a CSV to any output structure. Drag to reorder, edit header names, and preview before exporting.
→CSV Column Remover
Select columns to delete from a CSV. Useful for removing PII, internal reference fields, or extra columns before sharing or importing a file.
→CSV Column Renamer
Rename CSV header names without touching data rows. Edit headers in place, preview the result, and export with updated column names.
→CSV Header Fixer
Detect and fix blank, duplicate, and whitespace-padded headers. One-click auto-fix assigns sensible names and deduplicates automatically.
→CSV Validator
Check the structural quality of a CSV. Detects inconsistent column counts, missing or duplicate headers, empty files, and delimiter mismatches.
→CSV Delimiter Converter
Convert between comma, tab, pipe, and semicolon delimiters. Auto-detects the input delimiter and previews the converted output before export.
→CSV Encoding Converter
Re-encode CSV files to UTF-8. Detects BOM markers and supports common source encodings including ISO-8859-1 and Windows-1252.
→CSV Sorter
Sort CSV rows by up to 3 columns. Choose text, number, or date ordering, set ascending or descending per column, preview results, and export the sorted CSV.
→CSV Duplicate Finder
Find duplicate rows in any CSV file. Detect duplicates by full row or selected columns, review results, and export duplicate or unique rows — all in your browser.
→100% Private
Your CSV files are never uploaded to any server. All processing runs locally inside your browser tab using JavaScript.
No Install Required
Open any modern browser and start working immediately. No software to download, no account to create, no subscription needed.
Export Results
Download filtered results as clean CSV files ready for the next step in your workflow — import, reporting, or further analysis.