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How to Replace Text in a PDF (Not Cover It Up)

Updated 2026-09-17 · 2 min read

There are two ways to make a PDF say something different, and they produce very different files.

One rewrites the document. The other hides it.

PDFfont edits PDF text in the document's own embedded font — no white cover boxes.

The white-box method

A filled rectangle is drawn over the old words and new text is printed on top. The original text is still in the file and still extractable, the rectangle shows as a pale patch on coloured backgrounds, and any highlight or pattern underneath is destroyed.

True replacement

The glyph codes for the old text are removed from the page's content stream and new codes, using the same font object, are written in their place. Nothing is layered, nothing is hidden, and extracting the text returns exactly what you see.

How to tell which you used

Open the result and select the edited line. If you can select the old wording underneath, or the copied text differs from what is displayed, the tool covered rather than replaced.

Frequently asked

Can every PDF be edited this way?

Real text can. Scanned images have no text to replace.

What if the font lacks a character I typed?

A matching full font is acquired server-side so the glyph exists.

Does replacement break the search index?

No, the new text is fully searchable.

Try it on your own document

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