The PNG to PDF conversion pipeline only embeds the PNG as an image on the page; it does not run text recognition, so the resulting PDF has no selectable or searchable text layer.
Adobe's OCR tool is described as letting users recognize text in a PDF document as a separate step from conversion. Free OCR for PDF: Recognize text for a searchable PDF | Acrobat - Adobe
PNG To PDFTurning A PNG Image Into A Searchable PDF
PDF-File.com's separate OCR PDF tool only accepts PDF files and rejects other file types, so a PNG must first be converted to PDF before it can be made searchable with OCR PDF.
Place the PNG into the upload area to start the PNG to PDF half of the workflow.
Save the resulting PDF file before starting the OCR step.
Upload the downloaded PDF to the OCR PDF tool.
Checking Text Selection in the Final PDF
Open the final PDF in a document viewer.
Select a word to check for a text layer.
Clicking start-over after the download wipes the current PNG from the queue, freeing the tool to prep another file for the OCR pass with no reload required.
Continue with PNG to PDF transparency quality or Combine multiple PNG into one PDF.
Frequently Asked Questions about Convert PNG to Searchable PDF
How do I start the conversion process?
Add the PNG to the PNG to PDF converter as the first step toward a searchable file.
Where do I find the OCR step?
Open the OCR PDF page from the navigation menu and drop in the PDF you just saved.
How do I verify the text is searchable?
Click any word in the downloaded PDF and confirm it highlights instead of selecting the whole image.
How do I prepare another file?
Press the reset link to load a different PNG for the next OCR-prep pass.