Free CSV & Spreadsheet Tools

Analyze your CSV or Excel file structure, detect column types, and check Google Sheets compatibility.

• Column type detection
• GSheets limit check
• Data preview

Validate CSV files for header issues, empty rows, and column mismatches. Clean and download instantly.

• Error report
• Cleanup options
• Instant download

Convert CSV delimiters and quote characters (comma, semicolon, tab, pipe).

• Auto-detect
• Custom output
• Preview data

Detect CSV delimiters automatically and normalize separators with one click.

• Delimiter detection
• Confidence score
• Fix output

Convert Excel to CSV or CSV to Excel instantly. Supports XLSX, XLS, and CSV.

• Excel to CSV
• CSV to Excel
• Client-side

Split large CSV files into smaller chunks that fit within Google Sheets limits.

• Split by rows
• Split by parts
• ZIP download

Split your CSV into multiple files based on unique values in a column.

• Split by value
• Auto-naming
• ZIP download

Combine multiple CSV files into one. Supports different column structures.

• Multi-file upload
• Column matching
• Source tracking

Find and remove duplicate rows. Compare by all columns or select specific ones.

• Find duplicates
• Column selection
• Export both

Reorder and rename CSV columns with a simple, client-side editor.

• Reorder columns
• Rename headers
• Preview data

Fix encoding issues. Repair corrupted characters and add UTF-8 BOM for Excel.

• Auto-detect issues
• Excel BOM
• Turkish/EU chars

Convert CSV or Excel files to JSON format with pretty printing.

• Pretty print
• Copy to clipboard
• Instant download

Convert JSON arrays and objects to CSV. Automatically flattens nested objects.

• Flatten nested
• Upload or paste
• Preview data

Calculate if your data fits in Google Sheets' 10 million cell limit.

• Cell limit check
• Performance tips
• File or manual input

Fix multi-row headers from analytics tools. Merge into a single clean header.

• Auto-detect rows
• Custom separator
• Preview merge

Bulk find and replace with regex support. Column-specific replacements.

• Regex support
• Column selection
• Live preview

Mask emails, phone numbers, and IP addresses in CSV files instantly.

• Detect PII
• Redact or hash
• Client-side

Join two CSV files like VLOOKUP or SQL JOIN using a common key column.

• Left/Inner/Full join
• Key column match
• Case option

Convert between US, EU, ISO and other date formats in your CSV.

• Auto-detect format
• Multiple formats
• Preview

Transpose rows to columns, pivot (long to wide), or unpivot (wide to long).

• Simple transpose
• Pivot/Unpivot
• Aggregation