How to Fix PDF Text Displaying as Symbols or Boxes
Question details
The user is looking for a solution to resolve an issue where text in a PDF document turns into unreadable symbols or small boxes during the editing process.
- Product
- PDF Document
- Device & OS
- not provided
- Scenario
- Attempting to edit text directly within a multi-page PDF document, such as a large catalog.
- Observed behavior
- Standard characters (like Arial) suddenly change into garbled symbols or small square boxes while the document is being edited.
Ensure you have access to the original source file (such as the Word, InDesign, or PowerPoint document) that was used to create the PDF, as resolving severe font encoding issues directly within a compiled PDF is often unsuccessful.
Re-export the PDF from the Original Source File
The most reliable way to fix missing, corrupted, or uneditable fonts is to generate a fresh PDF from the original document with all required fonts fully embedded.
When a PDF displays text as squares or random symbols during editing, it indicates that the fonts used in the document were not embedded properly, or the font encoding map is corrupted. A PDF editor relies on these embedded fonts to render text correctly when changes are made.
Because PDFs are primarily designed as an output format rather than a primary editing source, heavily text-based changes can break character mapping if the exact subset of the font isn't available. Going back to the source file is the safest approach.
Find and open the native layout file (e.g., Word document, Publisher file, or InDesign project) that the PDF was originally created from.
Check the document to ensure that the correct fonts (such as Arial) are installed on your computer and are displaying correctly within the source application.
Navigate to the 'File' menu and select 'Export' or 'Save As', choosing PDF as the format. In the export options or advanced settings, locate the font settings and ensure that the 'Embed all fonts' option is checked.
Open the newly exported PDF in your preferred PDF editor and attempt a minor text edit to confirm the text remains readable and editable without turning into symbols.
Edit and Convert PDFs Seamlessly with WPS Office
WPS Office provides a comprehensive PDF toolkit that allows you to accurately edit PDF text, manage fonts, and securely convert your source documents to high-quality PDFs with fully embedded fonts, preventing text corruption.
- 1. Open WPS Office: Launch the WPS Office desktop application on your computer.
- 2. Convert Source to PDF: Open your original document (Word, PPT, etc.), navigate to the 'Menu', and select 'Export to PDF' to create a well-encoded PDF file.
- 3. Edit PDF Text Safely: To edit an existing PDF, open it in WPS PDF, navigate to the 'Edit' tab, and click 'Edit Text' to make changes using native font mapping.
Frequently Asked Questions
Why does my PDF text look like weird symbols when I copy and paste it?
This happens due to missing or corrupted font encoding in the PDF. While the shapes of the letters may look fine visually, the underlying text mapped to your clipboard is incorrect or missing, resulting in gibberish when pasted elsewhere.
Can I fix the square boxes in my PDF without the original file?
If you cannot access the source file, you can use the OCR (Optical Character Recognition) feature available in advanced PDF editors like WPS PDF. OCR scans the visual appearance of the text and converts it into new, standard, and editable characters.
Does installing the missing font on my computer fix the symbol issue?
Sometimes. If the PDF requires a specific system font that is missing or corrupted on your machine, downloading and installing that exact font file (e.g., a specific variation of Arial), then restarting your PDF editor, might allow the text to display properly.
