Using Spreadsheet Software (e.g., Microsoft Excel, Google Sheets, LibreOffice Calc):

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Open your spreadsheet software.
Go to "File" > "Open" and navigate to the export_results.html file (or the individual chat HTML file) in your export folder.
The software will likely attempt to parse the HTML data into a spreadsheet format. You might need to adjust the import settings (e.g., delimiter, encoding) to ensure the data is correctly organized into columns.
Once imported, you can further format the data, remove unnecessary elements, and save it as an Excel (.xlsx) file ("File" > "Save As").
Online HTML to Excel Converters: Numerous free online tools can convert HTML tables to Excel. Be cautious when using third-party websites and ensure they are reputable before uploading your data.
Convert HTML to PDF:
Using a Web Browser (e.g., Chrome, Firefox, Edge):
Open the export_results.html file (or the individual chat HTML file) in your web browser.
Go to "File" > "Print" (or Ctrl+P / Cmd+P).
In the print dialog, change the "Destination" to "Save as PDF". You might need to adjust layout settings (e.g., orientation, margins) for optimal PDF output.
Click "Save" and choose a location to save your PDF file.
Online HTML to PDF Converters: Similar to Excel converters, many online tools can convert HTML files to PDF. Exercise caution when using these services.
Method 2: Utilizing Third-Party Tools and Scripts (Use with Caution)

There are some third-party tools and scripts malaysia telegram phone number list available online that claim to directly convert Telegram history to Excel or other formats.

Important Considerations:

Security Risks: Downloading and running untrusted third-party software can expose your system to malware or compromise your Telegram account. Exercise extreme caution and only use reputable sources if you choose this route.
Reliability: The functionality and reliability of these tools can vary, and they might break with Telegram updates.
Terms of Service: Using unofficial tools might violate Telegram's terms of service.
If you are technically inclined, you might find open-source scripts (e.g., on platforms like GitHub) that can parse the JSON export and convert it to CSV (which can be opened in Excel) or other formats. However, this requires programming knowledge and careful execution.