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Spreadsheet: XLS, XLSX, ODS, CSV
Presentation: PPT, PPTX, ODP · Maks 200 MB
Exports arrive as CSV. Real work needs formulas, formatting and more than one sheet.
CSV is a table written as plain text with commas between the values. It has no formulas, no formatting, no second sheet and no notion of a data type, which is exactly why every database, shop and analytics tool accepts it.
XLSX is a ZIP of XML like DOCX, and keeps everything a spreadsheet needs: formulas, multiple sheets, formatting, charts and validation rules. It also lifted the row limit from 65 536 to 1 048 576.
| CSV | Excel | |
|---|---|---|
| Released | 1970s | 2007 |
| Developed by | No single owner (RFC 4180) | Microsoft (Office Open XML) |
| Type | Plain-text table | Spreadsheet |
| Editable | Yes, in anything | Yes, fully |
| Layout behaviour | One sheet, values only | Grid, over a million rows |
| Best suited to | Moving data between systems | Real spreadsheet work |
| Support | Absolute | Universal |
Nothing is lost, because CSV carries only values to begin with. Watch the opposite problem instead: long numbers, leading zeros and dates can be reinterpreted on the way in, so check any ID or postcode column.
Most documents finish in a few seconds. Conversion runs on our server rather than in your browser, so the slow part is usually the upload. Long reports and image-heavy files take proportionally longer.
Your file is uploaded to our server because the conversion runs there. A cleanup task runs every hour and deletes anything older than an hour, so nothing you upload survives more than about two hours. We do not open your files, we do not keep copies, and no account is needed to use the converter.