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Edit PDF guide

How to add text to a PDF on iPhone or Android

Choose a PDF from phone storage, enter new text, position it on the intended page, and save a new copy.

Updated September 2026 · PDFKaka EditorialOpen Edit PDF
Capture the Edit PDF workspace at a 390 px mobile viewport with synthetic sample content and the control needed for “How to add text to a PDF on iPhone or Android” visible.

Add the PDF overlay

  1. Choose the PDF and open the page that needs new visible content.
  2. Add a text box, image, highlight, drawing, or shape as an overlay.
  3. Open the downloaded PDF on the phone and zoom into the added text.

Overlay editing versus changing existing PDF text

Adds overlays; it does not select, delete, replace, or reflow existing PDF text. Saving invalidates an existing cryptographic signature.

FAQ

Does Edit PDF replace the existing text in the file?

No. PDFKaka adds new overlay content; it does not select, delete, replace, or reflow the text objects already stored in the PDF.

What is the current input limit for Edit PDF?

PDF; JPG/PNG overlay images; One PDF ≤50 MiB, ≤500 pages.

What does Edit PDF create?

Adds new overlay objects to the PDF; existing source text is not rewritten or rasterized by default. One PDF ≤150 MiB with new overlays.

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