Convert CSV to Excel (XLSX) online for free. Turn comma-separated data into a formatted spreadsheet. Fast, secure — no signup, no software.
Kích thước tệp tối đa 10 MB. Đăng ký để biết thêm.
| Tên tệp | Kích thước | Chuyển đổi sang |
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Kiểm tra tập tin và định dạng đầu ra đã chọn.
| Tên tệp | Kích thước tệp | Tải xuống |
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CSV → XLSX is what you do when you've exported data from a database, analytics tool, or SaaS report as CSV but need Excel formulas, pivot tables, or charts on top. Preserves the raw data, adds an Excel-native structure. For very large CSV files (>1 M rows) Excel is not the right tool — Google Sheets caps at 10 M cells; better to query directly via BigQuery / Postgres.
XLSX is Excel's modern format — preserves formulas, formatting, multiple sheets, charts. Convert to XLSX when the recipient will interact with the data in Excel or Google Sheets (pivot tables, financial modelling, forecast workbooks). Overkill for one-off tabular data — CSV is lighter and more portable.
A spreadsheet conversion moves cells, sheets, and values from one container to another. Knowing what each format keeps — and what it drops — saves a lot of "where did my formulas go" surprises.
Drop the CSV file above or click to browse. Free-tier uploads are capped at 10 MB — comfortably enough for tens of thousands of rows; Pro handles files up to 1 GB. The filename is preserved and the new extension is appended automatically.
Cell values, columns, and rows are read from the CSV and written into the XLSX structure. When both formats are spreadsheet-native (XLSX, XLS, ODS), formatting, multiple sheets, and formulas are preserved. When the target is CSV — a plain-text grid — the converter exports the values as clean, comma-separated rows that any tool can import.
Your XLSX file is ready in seconds. Open it and confirm the columns line up and numbers kept their type. Both the CSV you uploaded and the XLSX output are permanently deleted from our servers within 30 minutes.
Native spreadsheet formats (XLSX, XLS, ODS) store a workbook: multiple sheets, cell formatting, formulas, charts, and data types all live inside one file. CSV stores exactly one thing — a single grid of raw values as plain text. That difference decides what survives the trip.
Converting between two native formats preserves nearly everything. Converting to CSV deliberately flattens the workbook to its data: one sheet, no formulas (their results are kept, not the formulas themselves), no colours or merged cells. That's not a bug — it's exactly why CSV is the universal format for moving data between systems.
=SUM(A1:A9) exports as the computed number, not the formula. Keep the native CSV as your working copy if you still need to recalculate.Những lý do thực sự khiến mọi người thực hiện chuyển đổi này - dựa trên những vấn đề cụ thể chứ không phải những lợi ích mơ hồ.
Most databases, CRMs, and web apps accept XLSX as their import format but reject native workbooks. Converting your CSV to XLSX turns a spreadsheet into something a bulk-import tool can actually read, row by row.
A legacy XLS, an Apple Numbers export, or an ODS from LibreOffice doesn't always open cleanly everywhere. Converting to XLSX gets the data into a format the recipient's tool handles without formatting errors or "file corrupt" warnings.
Python, R, and command-line tools love plain, predictable input. Converting CSV to XLSX gives a script a clean grid to parse — no proprietary container to decode, no surprise sheets, just the values.
Native workbooks carry formatting, charts, and metadata that inflate size. If all you need is the data, converting CSV to XLSX can cut the file down dramatically — handy for email limits, uploads, or version control.
Accounting platforms, payroll systems, and analytics tools often publish an exact template format for uploads. If they require XLSX and your export is CSV, this conversion is the step between "ready" and "rejected."
When data arrives as a mix of XLS, XLSX, and ODS from different sources, analysis is a headache. Converting everything to a single XLSX format first means one consistent input — and you can batch the whole folder in one pass.
Mọi chuyển đổi đều diễn ra trên các video tải lên được mã hóa TLS, trên các nhân viên riêng biệt theo yêu cầu, với cả nguồn và kết quả đều được tự động xóa trong vòng 30 phút. Không có quảng cáo, không có hình mờ trên các cấp độ trả phí, không có dữ liệu được khai thác để đào tạo.
So sánh kỹ thuật của hai định dạng — hữu ích cho việc quyết định nên sử dụng định dạng nào hoặc để xác nhận những thay đổi nào trong quá trình chuyển đổi.
| Tài sản | CSV | XLSX |
|---|---|---|
| Tên đầy đủ | Giá trị được phân tách bằng dấu phẩy | Microsoft Excel (Open XML) |
| Năm giới thiệu | 1972 | 2007 |
| Nhà phát triển/cơ quan tiêu chuẩn | IBM (informal) | Microsoft |
| loại MIME | text/csv | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| Phần mở rộng tập tin | .csv | .xlsx |
| nén | None | ZIP-compressed XML |
| Độ sâu màu sắc/dữ liệu | không áp dụng | không áp dụng |
| Kích thước/kích thước tối đa | Không giới hạn | 1,048,576 rows × 16,384 columns |
| Minh bạch | Không | Không |
| Hoạt hình | Không | Không |
| Tiêu chuẩn/đặc điểm kỹ thuật | IETF RFC 4180 | ECMA-376 / ISO/IEC 29500 |
| Tốt nhất cho | Data interchange, database imports, ETL pipelines | Modern Excel spreadsheets, data analysis |
CSV (Comma-Separated Values) is a plain text format that stores tabular data with each row on a new line and values separated by commas. CSV has no formal standard body, though RFC 4180 defines common conventions. Its simplicity makes CSV the most universally supported data interchange format — every spreadsheet, database, programming language, and analytics tool can read and write CSV files.
CSV files contain only raw data values with no formatting, formulas, charts, or metadata. This simplicity is both its strength and limitation: CSV files are compact, human-readable in any text editor, and import seamlessly into databases and data processing pipelines. CSV is the standard format for data exports, ETL workflows, machine learning datasets, CRM imports, and moving data between incompatible systems.