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Excel Data Cleaner - Convert Excel to CSV / TSV / JSON

All processing happens in your browser. Your spreadsheet data is not uploaded.

Pasting Excel/Sheets data into forms or scripts often breaks due to tabs, quotes, and inconsistent columns—especially when you need a clean CSV/TSV/JSON output quickly.

Paste a table from Excel/Google Sheets and convert it to CSV, TSV, or JSON. Preview, transpose, pick columns, and clean quotes instantly.

Show detailed guide & explanations▼

Why you may need this tool

Data copied from spreadsheets often breaks when moved into another system. Cells may include hidden newlines, inconsistent spacing, mixed types, or columns that are not needed for the next step. These small differences can cause upload failures, incorrect analysis, or mismatched comparisons. Cleaning spreadsheet data is a form of preprocessing: you keep the meaning, but reshape the output into a more machine - friendly format for export, import, or testing.

How to use

Paste the table range, choose the target output format, and review a few rows to confirm columns map correctly.

  1. Copy a range from Excel/Google Sheets (Ctrl+C)
  2. Paste into the input box
  3. Choose output format (CSV, TSV, JSON)
  4. Optionally transpose or select columns
  5. Copy or download the result

Examples

Preparing a CSV upload that fails due to formatting
Uploads can fail when cells contain stray newlines or inconsistent delimiters. Cleaning the pasted table and exporting a normalized CSV improves upload success and review speed.
Generating JSON arrays from a header - based table
When the first row is a header, it naturally becomes JSON keys. Converting after cleanup helps keep key/value mapping stable and reduces type - related surprises.

Benefits & differentiators

A cleaning step reduces downstream issues by standardizing text, separators, and column structure. This is helpful for CSV/TSV exports, system uploads, and JSON conversions. Once cleaned, the dataset becomes more reusable: you can share it across teams and tools without repeating the same manual fixes each time.

Who this is for

Recommended if you: - move data from sheets into uploads or APIs - deal with hidden newlines and spacing in cells - need consistent CSV/TSV/JSON exports - want a repeatable preprocessing step before analysis

FAQ

Does this upload my Excel data?
No. Everything runs locally in your browser. Your data is not sent to our servers.
How do I paste from Excel?
Copy cells in Excel/Sheets and paste here. The tool reads tab - separated cells and line breaks automatically.
Can I convert to JSON with headers?
Yes. You can treat the first row as headers and output an array of objects.
What does transpose do?
Transpose swaps rows and columns (turns columns into rows and rows into columns).
Can I select only some columns?
Yes. You can pick columns by index or header name (when headers are enabled).

Related Tools

CSV to JSON
Convert CSV into JSON instantly. Supports headers, custom delimiters, and quoted fields. Runs in your browser.
JSON Formatter
Format, beautify, and validate JSON code instantly. Make your JSON readable with proper indentation.
Remove Spaces
Remove extra spaces, tabs, and whitespace from text or code instantly. Clean up formatting with one click.
Remove Line Breaks
Remove line breaks and convert multi - line text to a single line instantly. Useful for cleaning up copied text.

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