: Upload the broken PDF to Google Drive . Once uploaded, right-click and select Open with > Google Docs . This process can often reconstruct the text and images into a fresh, readable document.

: Open Adobe Acrobat and go to Help > Check for Updates . Installing the latest patch can resolve issues where the reader fails to recognize non-standard headers.

: Ensure the app has permission to write to the folder where your PDFs are stored.

: A momentary drop in your internet connection can leave the PDF incomplete.

Before attempting a fix, determine why the file won't open. Common causes include: