Working with spreadsheets shouldn’t require installing heavy software or relying on device-specific programs. DoconutApp provides an instant, browser-based solution for opening XLS, XLSX, CSV and ODS files without downloading anything.
Whether you’re reviewing a budget sheet, checking imported data, verifying a CSV export, or inspecting an ODS file from another platform, DoconutApp loads your spreadsheet in seconds—all inside a clean, responsive interface.
Key Advantages for Spreadsheet Users
- Zero installation required – Upload and view immediately.
- Instant rendering – Large spreadsheets appear in seconds.
- Secure handling – SSL/TLS transport and AES-256 encryption.
- Cross-device viewing – Works on Windows desktops, tablets and smartphones.
- Automatic cleanup – Files are removed as soon as your session ends.
This makes DoconutApp a practical solution for accountants, students, analysts, IT staff, and anyone dealing with spreadsheet data.
Instant Spreadsheet Preview in Your Browser
DoconutApp is specifically optimized for spreadsheet formats. The viewer processes:
| Format arkusza | Opis |
|---|---|
| XLS | Klasyczne arkusze Excel używane w starszych systemach |
| XLSX | Nowoczesny format Excel z bogatymi danymi i formułami |
| CSV | Pliki tekstowe (plain-text) służące do eksportów, importów i logów |
| ODS | Arkusze OpenDocument używane przez LibreOffice i inne narzędzia |
Every file is rendered with smooth scrolling, crisp text, and responsive zoom. Multi-sheet workbooks can be reviewed easily, letting you move between tabs without delays.
Performance Optimized for Large Sheets
DoconutApp is designed to handle spreadsheets that contain:
- Thousands of rows
- Multiple worksheets
- Mixed data types (numbers, text, dates, formulas)
- Structured tables and formatted cells
Typical load times remain fast, even for spreadsheets up to the 25 MB session limit. Navigation stays fluid thanks to the lightweight rendering engine optimized for tabular data.
Secure Spreadsheet Viewing with AES-256 Encryption
Privacy and security are central to the platform:
- All uploads travel over SSL/TLS, preventing interception.
- AES-256 encryption protects files during processing.
- Files are never stored permanently—they are deleted automatically when the session ends.
- No accounts, no tracking, no data retention.
This makes DoconutApp suitable for documents involving financial data, customer records, exports from internal systems, or sensitive CSV logs.
View Spreadsheets Across Multiple Devices
DoconutApp adapts to whichever device you’re using:
- Windows desktop browsers – Full-size navigation, keyboard scrolling.
- Tablets – Touch-friendly zoom and swipe to move across rows and columns.
- Smartphones – Compact presentation optimized for quick checks on the go.
Everything works through the browser—you never need to install Excel or any other spreadsheet app.
Common Questions
Q: Jakie formaty arkuszy kalkulacyjnych są obsługiwane?
A: XLS, XLSX, CSV i ODS.
Q: Czy istnieje limit rozmiaru pliku?
A: Tak, do 25 MB na sesję.
Q: Czy DoconutApp zapisuje moje arkusze?
A: Nie. Pliki są automatycznie usuwane, gdy sesja podglądu się kończy.
Q: Czy muszę zakładać konto?
**A: Nie jest wymagane konto. Po prostu prześlij swój arkusz i obejrzyj go od razu.
Key Takeaways
- DoconutApp offers a free, secure, instant online spreadsheet viewer.
- Supports XLS, XLSX, CSV and ODS with fast rendering.
- No installation, no sign-up, no dependencies.
- AES-256 encryption and automatic deletion protect your data.
- Works across Windows desktops, tablets and smartphones.
- Perfect for quick reviews, audits, analysis, imports/exports, and data verification.
