Edit spreadsheet files online without an account.
Open common spreadsheet and tabular formats, edit cells, use formulas, sort data, build simple charts, and export your work. The editor runs in your browser; project saving uses your browser's local storage.
Supported import and export formats
The editor can import common spreadsheet and text-table formats. XLSX and XLS reading/writing is provided through SheetJS Community Edition loaded from a public CDN; CSV, TSV, JSON, HTML and TXT operations are handled in the browser.
| Format | Import | Export |
|---|---|---|
| XLSX / XLS | Yes | XLSX |
| CSV / TSV | Yes | CSV |
| JSON | Yes | JSON |
| HTML tables | Yes | HTML |
| TXT | Yes | TXT |
Privacy and local saving
Editing happens in the browser. If you use Save Project, the project is stored in your browser's local storage on that device. Clearing browser site data can remove locally saved projects, so export important work to a file before clearing browser data.
Compatibility and limitations
This is a lightweight browser editor, not a replacement for a full desktop spreadsheet suite. Complex workbook features, macros, advanced formatting, external data connections, protected sheets and some formula behavior may not be preserved. Always keep an original copy of important workbooks.
AI-assisted development disclosure: the initial editor prototype was generated with DeepSeek and then reviewed, modified, security-hardened and integrated into QuickConverterLab. See Third-party notices.