Categories

← View All Tools

Excel Field-Level Decryptor

Decrypt specific fields in Excel files using various decryption methods to restore encrypted information

Click to upload file or drag and drop file here

Maximum file size: 0MB Supported formats: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel

Specify which Excel columns to decrypt. If empty, all fields will be decrypted by default.

Only required for AES decryption method. Use to same key that was used for encryption.

Number of positions to shift back for Caesar cipher decipher (1-25)

Index of worksheet to process (0 for first worksheet, 1 for second, etc.)

Treat first row as column headers

Skip detailed analysis and only output decrypted data

Key Facts

Category
Security
Input Types
file, select, text, number, checkbox
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Excel Field-Level Decryptor is a secure utility designed to restore encrypted or obfuscated data within your spreadsheet files. It supports multiple decryption methods, including AES, Base64, and Caesar cipher, allowing you to target specific columns or entire worksheets for quick and accurate data recovery.

When to Use

  • •Recovering sensitive information that was previously obfuscated for privacy or transport.
  • •Standardizing data exports where specific fields were encoded using common algorithms.
  • •Restoring access to encrypted spreadsheet content when you possess the necessary keys or shift values.

How It Works

  • •Upload your Excel file and select the appropriate decryption method from the available options.
  • •Specify the target columns or fields if you only need to decrypt a subset of your data.
  • •Provide the required decryption key or shift amount if using AES or Caesar cipher methods.
  • •Choose your preferred output format and download the restored spreadsheet.

Use Cases

Decoding Base64-encoded contact information exported from legacy CRM systems.
Restoring sensitive financial figures protected by AES encryption for secure internal sharing.
Reversing Caesar-shifted text fields in datasets used for data analysis and reporting.

Examples

1. Restoring Encrypted Customer Emails

Data Analyst
Background
A marketing team received a lead list where email addresses were encoded in Base64 to prevent accidental exposure.
Problem
The team needs the raw email addresses to perform an outreach campaign.
How to Use
Upload the file, select 'Base64 Decoding' as the method, and specify the 'Email' column.
Outcome
The tool outputs a clean Excel file with the email addresses fully restored and ready for use.

2. Decrypting Financial Records

Financial Auditor
Background
An auditor has an Excel sheet containing sensitive salary data encrypted with AES.
Problem
The auditor needs to view the actual figures to verify payroll compliance.
How to Use
Upload the file, select 'AES Decryption', enter the provided decryption key, and process the file.
Outcome
The encrypted cells are replaced with the original numeric values, allowing for accurate auditing.

Try with Samples

xml, xlsx, xls
XLSX Samples
Sample XLSX spreadsheets for worksheet parsing and data extraction testing
preferred input family xlsx,xls
xlsx, xls
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
preferred input family xlsx
xlsx
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
preferred input family xlsx
xlsx
Nginx Log Parser Samples
Comprehensive Nginx log samples for testing log-parser tool, including access logs and error logs with various formats and scenarios
matched family xml
xml

Related Hubs

Xml Convert Tools
Explore 32 xml tools for convert workflows and compare closely related utilities quickly.
Json Convert Tools
Explore 100 json tools for convert workflows and compare closely related utilities quickly.
Image Convert Tools
Explore 100 image tools for convert workflows and compare closely related utilities quickly.
Audio Convert Tools
Explore 100 audio tools for convert workflows and compare closely related utilities quickly.

FAQ

Which file formats are supported?

The tool supports standard Excel formats, including .xlsx and .xls files.

Do I need a key for all decryption methods?

No, a key is only required for AES decryption. Other methods like Base64 or Caesar cipher use different parameters.

Can I decrypt only specific columns?

Yes, you can enter comma-separated field names in the 'Fields to Decrypt' option to target specific data.

What happens if I don't know the decryption method?

You can select the 'Auto-Detect Method' option, and the tool will attempt to identify and apply the correct decryption logic.

Is my data secure during the process?

The tool processes your file locally or via secure server-side operations to ensure your data remains private and is not stored permanently.

API Documentation

Request Endpoint

POST /en/api/tools/excel-field-decryptor

Request Parameters

Parameter Name Type Required Description
excelFile file (Upload required) Yes -
decryptionMethod select Yes -
selectedFields text No Specify which Excel columns to decrypt. If empty, all fields will be decrypted by default.
decryptionKey text No Only required for AES decryption method. Use to same key that was used for encryption.
caesarShift number No Number of positions to shift back for Caesar cipher decipher (1-25)
worksheetIndex number No Index of worksheet to process (0 for first worksheet, 1 for second, etc.)
hasHeader checkbox No Treat first row as column headers
outputFormat select Yes -
decryptedOnly checkbox No Skip detailed analysis and only output decrypted data

File type parameters need to be uploaded first via POST /upload/excel-field-decryptor to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-excel-field-decryptor": {
      "name": "excel-field-decryptor",
      "description": "Decrypt specific fields in Excel files using various decryption methods to restore encrypted information",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=excel-field-decryptor",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]