How to edit text
Open the editor and choose a PDF from your device.
Double-click a detected text fragment on the page.
Change the text in the inline editor that appears.
Choose font, size, color, underline, highlight, or rotation if needed.
Press Enter or click Apply to save the change.
Download the modified PDF when done.
How it works technically
CrabPDF renders each PDF page in the browser canvas.
It builds an invisible text layer over the rendered page.
Each text item is mapped to its exact page coordinates.
When you edit, CrabPDF covers the old area and draws the new text.
Modified PDF bytes are serialized and downloaded locally. Once CrabPDF is loaded, you can turn off Wi-Fi and keep working.
Private by design
CrabPDF runs entirely in your browser. Your PDF never leaves your machine during the editing flow.
CrabPDF is experimental. Always verify important documents after editing.