CSV Editor (Preview & Remove Columns)
Preview CSV before editing. Choose columns to keep, delete the rest, split one column into many, or merge several columns into one — all in your browser.
CSV preview and CSV edit stay local. Useful for CSV column delete, CSV column split, CSV column merge, and CSV column selection.
Voltage Drop Calculator
CSV preview + CSV edit in one place: delete columns, choose CSV columns, reorder, split columns, and merge columns before downloading.
What this CSV editor can do
Check the CSV preview first. Auto-detect delimiters (comma/tab/semicolon/pipe) and switch manually if needed.
Keep only the columns you need to reduce mistakes. Verify column names and counts before export.
Drag to change column order — this is not value sorting.
Split one column into multiple columns using a delimiter or regex. Control max parts and how unsplittable rows are handled.
Combine multiple columns into one with a chosen separator and empty-cell handling.
Load CSV
Local onlyPrevizualizare
Preview shows only the first N rows.Columns to keep
—Advanced: reorder columns
Drag to change column order (not sorting by value).
Split column
Merge columns
Download edited CSV
Local-only downloadUI & settings
Import
- Delimiter: Auto / comma / tab / semicolon / pipe / custom
- Encoding: Auto / UTF-8 / Shift_JIS
- Header row: treat first row as column names
Previzualizare
- Rows to show: 50 / 100 / 200
- Search: column names and values
Column operations
- Keep columns only (delete the rest)
- Show selected columns only
- Advanced: drag to reorder columns
Split
- Target column (dropdown)
- Split by delimiter or regex
- Max split count and handling for unsplittable rows
- Auto-generated column names (editable)
Merge
- Select multiple columns
- New column name
- Separator: _ / / / - / space / custom
- Empty-cell handling: skip or keep
Descarcă
- Auto file name: original_edited.csv
- Line endings: LF / CRLF
How to use (3 steps)
- Load a CSV (Choose CSV or drag & drop).
- Preview and edit: keep columns, reorder, split or merge if needed.
- Download the edited CSV. The original file is untouched.
Example: split & merge
id,last,first,region 1,Smith,Anna,CA-San Francisco 2,Lee,Ken,WA-Seattle
full_name,region_state,region_city Smith Anna,CA,San Francisco Lee Ken,WA,Seattle
Note
- Preview shows only the first N rows for speed. The conversion applies to the whole file.
- Proper CSV parsing is required when quoted fields contain commas or line breaks (supported by this tool).
- Performance depends on your device for large files. Keep preview light.
- This tool runs entirely in your browser. No data is uploaded.
Tips
- Use regex split for mixed separators (e.g. commas + spaces).
- Merge columns with a custom separator to create stable IDs.
- If you see garbled text, switch the encoding to Shift_JIS.
Monthly rent increase
Are uploaded CSV files sent to a server?
Nu. Totul rulează local în browser.
Can I change column order?
Yes. Use the advanced option and drag columns to reorder them.
How many rows are shown?
Preview shows only the first N rows for speed, but the conversion applies to the full file.
Can I handle CSVs with multiple delimiters?
Yes. Use the advanced regex delimiter option for mixed separators.
Can I choose the separator when merging columns?
Yes. You can set _, /, -, space, or any custom separator.
Will the original file be modified?
No. The edited CSV is downloaded as a new file.
Can I open Shift_JIS CSVs?
Yes. Switch the encoding to Shift_JIS or use Auto detection.