Yes. All processing happens in your browser. Your files are never uploaded to any server.

Is there a file size limit?

No hard limit, but files over 100MB may be slow on older devices.

Do I need to install Excel?

No. Everything works in your browser — no Microsoft Office required.

Yes, completely free for personal and commercial use.

Does it preserve formulas?

No. We read and write computed values. Formulas are not preserved.

SmartExcel 📊 — 16 Free Online Excel & CSV Tools

📗

CSV to Excel

Convert CSV files to Excel .xlsx format instantly.

1.2M / mo

📄

Excel to CSV

Export Excel sheets to clean CSV files.

900K / mo

🔗

JSON to CSV

Turn JSON data into CSV spreadsheets.

700K / mo

🧩

CSV to JSON

Convert CSV rows into structured JSON.

600K / mo

📘

JSON to Excel

Convert JSON arrays to Excel workbooks.

600K / mo

👁️

Excel Viewer

Preview any Excel file directly in your browser.

500K / mo

📤

Excel to JSON

Export Excel sheets to JSON format.

500K / mo

🧹

Remove Duplicate Rows

Clean duplicates from CSV or Excel files.

400K / mo

🔀

Excel Merger

Combine multiple Excel sheets into one file.

400K / mo

🔗

CSV Merger

Merge multiple CSV files in seconds.

300K / mo

✂️

Excel Splitter

Split large Excel files into smaller ones.

300K / mo

🗑️

Remove Empty Rows

Clean blank rows from your spreadsheets.

300K / mo

🔤

Sort CSV

Sort CSV data by any column ascending or descending.

200K / mo

🗄️

SQL to CSV

Convert SQL result dumps into CSV files.

200K / mo

📋

Excel Column Extractor

Extract specific columns from Excel or CSV.

200K / mo

🔬

Scientific Notation Fixer ⭐

Fix scientific notation & leading zeros when opening CSV in Excel.

NEW · High Demand

Free Spreadsheet Tools Online

CSV to Excel

Excel to CSV

JSON to CSV

CSV to JSON

JSON to Excel

Excel Viewer

Excel to JSON

Remove Duplicate Rows

Excel Merger

CSV Merger

Excel Splitter

Remove Empty Rows

Sort CSV

SQL to CSV

Excel Column Extractor

Scientific Notation Fixer ⭐

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