new KB for fonts validation - general info

Author: dessyordanova

knowledge-base/validating-fonts-document-processing.md

@@ -1,11 +1,11 @@
 ---
-title: Checking and Validating Fonts for Telerik Document Processing
+title: Validating Fonts when Using Telerik Document Processing
 description: Learn how to identify and resolve issues caused by incomplete or corrupt TTF font files in exported PDFs using Telerik Document Processing.
 type: how-to
 page_title: Resolving Missing Content Issues in PDF Export Due to Fonts
 meta_title: Resolving Missing Content Issues in PDF Export Due to Fonts
-slug: validating-fonts-document-processing
-tags: radwordsprocessing, document processing, ttf, font, validation, pdf export
+slug: validating-fonts-pdf-document-processing
+tags: word, document, processing, ttf, font, validation, pdf, export
 res_type: kb
 ticketid: 1690314
 ---
@@ -14,37 +14,38 @@ ticketid: 1690314
 
 | Version | Product | Author | 
 | ---- | ---- | ---- | 
-| 2025.2.520| RadPdfProcessing |[Desislava Yordanova](https://www.telerik.com/blogs/author/desislava-yordanova)| 
+| 2025.2.520| Telerik Document Processing |[Desislava Yordanova](https://www.telerik.com/blogs/author/desislava-yordanova)| 
 
 ## Description
 
-When exporting a document to PDF using [Telerik RadWordsProcessing](https://docs.telerik.com/devtools/document-processing/libraries/radwordsprocessing/overview), missing content may occur due to issues with the TTF font file. These issues can arise if the font file is incomplete, corrupted, or missing required font tables. This results in missing or improperly rendered text in the exported PDF.
+When exporting a document to PDF format using [Telerik RadWordsProcessing]({%slug radwordsprocessing-overview%}), missing content may occur due to issues with the TTF font file. These issues can arise if the font file is incomplete, corrupted, or missing required font tables. This results in missing or improperly rendered text in the exported PDF.
 
-This knowledge base article also answers the following questions:
-- Why does my PDF export have missing text due to fonts?
-- How can I validate fonts used in Telerik Document Processing?
-- What tools can check for font file integrity?  
+This knowledge base article gives some tips and tricks how to validate fonts used in Telerik Document Processing and what tools can check for font file's integrity.
 
 ## Solution
 
 To ensure a font file is complete and compatible with Telerik Document Processing, follow these steps:
 
-1. **Open the Font in a Font Viewer**  
+* **Open the Font in a Font Viewer**  
+
    Double-click the TTF file to open it in the system font viewer. Inspect whether all expected characters display correctly and ensure no error messages appear.
 
-2. **Test the Font in Other Applications**  
+* **Test the Font in Other Applications**  
+
    Install the font on your system and use it in applications like Word or Notepad. Verify that all characters render correctly.
 
-3. **Compare File Size and Metadata**  
+* **Compare File Size and Metadata**  
+
    Compare the file size and properties of the font with an official or known-good version. Noticeable differences can indicate corruption or missing data.
 
-4. **Use Font Validation Tools**  
+* **Use Font Validation Tools**  
    Validate the font file with tools like:
    - [FontForge](https://fontforge.org/)  
    - [Microsoft Font Validator](https://github.com/Microsoft/Font-Validator)  
    These tools check for missing tables, corrupt glyphs, and other font-related issues.
 
-5. **Check Required Styles**  
+* **Check Required Styles**  
+
    Verify that all required styles (Regular, Bold, Italic, etc.) are available if your document uses them. Missing styles can cause fallback or rendering issues.
 
 ### Recommendations
@@ -56,7 +57,7 @@ To ensure a font file is complete and compatible with Telerik Document Processin
 
 ## See Also
 
-- [RadWordsProcessing Overview](https://docs.telerik.com/devtools/document-processing/libraries/radwordsprocessing/overview)  
 - [FontForge](https://fontforge.org/)  
 - [Microsoft Font Validator](https://github.com/Microsoft/Font-Validator)  
-- [Working with Fonts in Telerik Document Processing](https://docs.telerik.com/devtools/document-processing/fonts/fonts-overview)  
+- [Fonts - Cross-Platform support]({%slug radpdfprocessing-cross-platform-fonts%})  
+- [Standard Fonts in PdfProcessing]({%slug radpdfprocessing-concepts-fonts%})

libraries/radpdfprocessing/concepts/fonts.md

@@ -164,5 +164,6 @@ You can create fonts that are not explicitly registered. Creating a font that is
  * [FontsRepository](https://docs.telerik.com/devtools/document-processing/api/Telerik.Windows.Documents.Fixed.Model.Fonts.FontsRepository.html)
  * [TextFragment]({%slug radpdfprocessing-model-textfragment%})
  * [Preserving the Font in PDF Export from Excel]({%slug preserve-font-boldness-pdf-export-radspreadprocessing%})
- * [How to Prevent Text with Special Characters from Being Cut Off when converting HTML to PDF using RadWordsProcessing]({%slug prevent-text-cut-off-pdf-conversion-radwordsprocessing%})
+ * [How to Prevent Text with Special Characters from Being Cut Off when converting HTML to PDF using RadWordsProcessing]({%slug prevent-text-cut-off-pdf-conversion-radwordsprocessing%}) 
+ * [Validating Fonts when Using Telerik Document Processing]({%slug validating-fonts-pdf-document-processing%})
 

libraries/radpdfprocessing/cross-platform/fonts.md

@@ -27,4 +27,5 @@ You can find a detailed **FixedExtensibilityManager** and **FontsProvider** desc
  * [Inserting Special Symbols in PDF using RadPdfProcessing]({%slug inserting-special-symbols-pdf-radpdfprocessing%})
  * [How to Eliminate Formatting Issues when Exporting XLSX to PDF Format]({%slug exporting-xlsx-to-pdf-formatting-issues%})
  * [Resolving Missing Content in Exported PDF Files]({%slug missing-content-word-to-pdf-radwordsprocessing%})
+ * [Validating Fonts when Using Telerik Document Processing]({%slug validating-fonts-pdf-document-processing%})