CSV to Excel Converter
Data ConvertersConvert CSV files to real .xlsx Excel workbooks instantly. Live spreadsheet preview, auto-sized columns, one-click download — 100% private and free.
Paste CSV text or upload a .csv file (or click "Load Sample") to build the workbook.
CSV to PDF Converter
Turn any CSV into a clean, styled PDF table in seconds. Choose portrait or landscape orientation with repeated headers on every page — runs 100% in your browser.
CSV to SQL Converter
Convert CSV data into CREATE TABLE and INSERT INTO statements with smart type inference. PostgreSQL, MySQL/MariaDB and SQLite dialects — copy ready-to-run SQL.
JSON to Excel Converter
Turn JSON arrays into real .xlsx spreadsheets in seconds. Auto-sized columns, a live spreadsheet preview, plus one-click Excel and PDF table export — 100% local and free.
JSON to CSV Converter
Convert JSON arrays or objects to CSV instantly. Nested objects are flattened into dot notation, arrays kept as clean JSON cells, with live preview and one-click .csv download.
How to Use
Three steps from raw data to finished output — no account required.
- 1
Paste your CSV data or upload a .csv file exported from a bank, CRM or database.
- 2
Review the live spreadsheet preview — headers, types and every row render instantly.
- 3
Click Download .xlsx for a genuine Excel workbook with auto-fitted column widths.
Frequently Asked Questions
Everything you need to know about the csv to excel converter.
Yes. The workbook is generated with SheetJS directly in your browser and downloads as a true .xlsx file — not a renamed CSV — that opens natively in Microsoft Excel, Google Sheets, LibreOffice Calc and Numbers.
Yes. Conversion runs on your device, so speed depends only on your machine, not a server round-trip. Files with hundreds of thousands of rows convert in seconds, and the preview shows the first rows so the interface stays fast.
Never. The file is read with the local browser File API and every step of the conversion happens in your tab. Customer lists, financial exports and confidential data stay on your machine.
Column widths are auto-fitted to your data (up to a readable maximum), and each cell keeps its original text so dates, leading zeros and reference codes are preserved exactly as they appear in the CSV.