Can I edit existing text?

No — pdf-lib can add new content but cannot modify existing text streams. To change existing text, use a desktop editor like Adobe Acrobat or LibreOffice Draw.

What coordinate system is used?

PDF points with origin at the bottom-left corner of the page. Y grows upward. The page size is shown for reference.

Are my edits uploaded?

No. The PDF is loaded, modified and saved entirely in your browser.

Can I add images too?

Use the dedicated PDF Image Stamp tool for that — it's optimized for placing PNG/JPG logos on pages.

Edit PDF

Add text boxes to any page at chosen positions — local.

100% private — no uploads PDF ToolsFree & unlimited Read tutorial

How to use Edit PDF

Follow these steps — everything happens instantly in your browser.

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Step 1. Drop a PDF onto the zone.
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Step 2. Click “Add” to insert a text box, then type your text.
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Step 3. Set the page (1-indexed), X/Y coordinates (PDF points, origin bottom-left), font size and color.
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Step 4. Click “Save edited PDF” to download the result.