Unlock Excel Document Password Online or via .NET
Develop powerful .NET based Excel document locking and unlocking utility application. Code listed for removing password restrictions from Excel file through .NET.
Unlock Excel Password Online
- Import Excel file to unlock by uploading it.
- Do it by clicking inside the drop area via drag and drop of app.
- Depending on the size of Excel file and internet speed wait for few seconds.
- Enter the password to remove.
- Click the ‘UNLOCK’ button to unlock document.
- Download the file instantly.
Remove Excel Password via .NET
- Load password-protected Excel file using Workbook class
- Select the relevant sheet
- Invoke the Unprotect() method to remove password
- Call the Save method to save the document
.NET Code : Remove Password from Excel Document
Unlocking Microsoft Excel files is essential when encountering restrictions like password protection, sheet locking, or workbook encryption. These limitations often prevent editing, analysis, or automation in business, academic, or technical workflows.
Unlocking Excel files should always be done ethically and legally, with proper authorization—especially when dealing with sensitive or proprietary data. When used responsibly, it significantly improves data accessibility, collaboration, and operational efficiency.
Use Cases
Editing Protected Worksheets
Remove cell, sheet, or workbook protection to allow data entry, formula editing, or structural changes.Accessing Hidden or Locked Data
Reveal and work with hidden sheets, columns, rows, or formulas locked by previous users.Automating Data Processing
Unlock files to enable scripted access via Excel macros, Python, Power Automate, or third-party tools.Collaborating on Shared Documents
Remove restrictions to enable multi-user editing, version tracking, and real-time collaboration.Correcting and Updating Formulas
Unprotect formula cells to fix broken logic, update assumptions, or add advanced calculations.Reusing Company Templates or Reports
Modify locked templates like financial models, dashboards, or project trackers for other clients or use cases.Migrating to Other Formats
Unlock for seamless conversion to CSV, Google Sheets, databases, or BI tools for further analysis.Auditing and Troubleshooting
Access protected sections to verify calculations, trace dependencies, or troubleshoot errors in complex workbooks.Recovering Forgotten Passwords
Necessary when the original author is unavailable or password credentials are lost, and access is still required legitimately.Fixing Corrupted or Malfunctioning Files
Unlocking helps isolate and fix issues caused by locked ranges, hidden scripts, or embedded controls.
Develop Excel Protection Management Application via .NET
Need to develop a Excel protection management app or utility? With
Aspose.Cells for .NET
a child API of
Aspose.Total for .NET
, any .NET developer can integrate the above API code within its document protection or unprotection application. Powerful .NET library allows programming any document protection solution. Moreover it can support many popular formats including Excel format.
.NET Utility to Manage Excel Protection
There are three alternative options to install “Aspose.Cells for .NET” or “Aspose.Total for .NET” onto your system. Please choose one that resembles your needs and follow the step-by-step instructions:
- Install a NuGet Package . See Documentation
- Install the library using Package Manager Console within Visual Studio IDE
- Install the library by hand using Windows Installer
System Requirements
Our product is fully cross-platform and supports all major .NET implementations following ‘.NET Standard 2.0’ specification:
- Microsoft .NET Framework, starting from the earliest 2.0 version, and ending with the latest ‘.NET Framework 4.8’
- .NET Core, starting from the earliest 2.0, and ending with the latest ‘.NET 6’
- Mono >= 2.6.7
As .NET code doesn’t rely on the underlying hardware or operating system, but only on a Virtual Machine, so you are free to develop any kind of software for Windows, macOS, Android, iOS and Linux. Just make sure you have installed the corresponding version of .NET Framework, .NET Core, Windows Azure, Mono or Xamarin.
We recommend using Microsoft Visual Studio, Xamarin, and MonoDevelop IDE to create C#, F#, VB.NET applications.
For more details please refer to Product Documentation .
FAQs
- Can I use above .NET code in my application?Yes, you are welcome to download this code and utilize it for the purpose of developing .NET-based document protection or unlocking application. This code can serve as a valuable resource to enhance the functionality and capabilities of your projects in the domain of backend document processing, manipulation and protection.
- Is this online document unlocking app work only on Windows?You have the flexibility to initiate document unlocking for password removal at any device, irrespective of the operating system it runs on, whether it be Windows, Linux, Mac OS, or Android. All that's required is a contemporary web browser and an active internet connection.
- Is it safe to use the online app to unportect Excel document?Of course! The output files generated through our service will be securely and automatically removed from our servers within a 24-hour timeframe. As a result, the display links associated with these files will cease to be functional after this period.
- What browser should to use App?You can use any modern web browser like Google Chrome, Firefox, Opera, or Safari for online Excel document unlocking. However, if you're developing a desktop application, we recommend using the Aspose.Total document processing API for efficient management.