Add Text to a PDF Online

Adding text to a PDF comes up constantly: a typed label on a scanned form, a date stamp on a received document, an instruction added to a template before forwarding, a correction layered over a printed value, a note placed in the margin for context.

This editor gives you two ways to do it. The Comment tool lets you click any point on the page canvas — blank space, margin, header, anywhere — and place a text box there. The Text Patch tool works in a complementary way: click an existing text run, replace the pre-filled original text with your own, then drag the overlay to wherever it needs to go. Both approaches embed as real content in the downloaded PDF and are visible in every PDF viewer.

Documents sent as PDFs often need text added after the fact. A contract template needs the client's name typed in before sending. A scanned form needs answers typed over the blank lines. A received invoice needs a "Received" or "Approved" stamp. A report needs a revision note in the header. These are common, practical tasks that used to require desktop software.

The Comment tool is the most flexible option for adding new text. It creates a yellow-backed note box by default — useful for anything that should read as an annotation or instruction rather than document content. For typed values that should blend into the page (answers on a form, a date in a field, a label under a diagram), a Text Patch with a white background is the cleaner approach.

Adding a text overlay does not restructure the document. The underlying page content is unchanged, and the added text sits on top of it. This is the right mental model for most use cases: you are adding a layer of text over a fixed document, not editing the document source. For most practical purposes — sending a labeled version to a client, filling in a form field that lacks interactivity, adding an approval stamp — this is exactly what the task requires.

For adding large amounts of text that replace significant sections of existing content, plan each text box carefully. The overlay does not reflow surrounding content, so you need to size the box to hold the full text without overflowing into adjacent content.