Stamp electronic signatures on your PDF files with our free Visual PDF Signer. Draw custom signatures, type cursive calligraphy names, or upload signature image stamps, then position them precisely on any page in browser RAM with 100% privacy.
Upload your contract, agreement, or form into the visual PDF signing canvas.
Draw your signature, type signature text, or upload a signature image stamp.
Place and resize signature stamps on any page, then click Save Signed PDF to download.
Draw custom freehand signatures, type elegant calligraphic script names, or upload pre-scanned signature graphic images.
Select any target page number and align your signature mark seamlessly across top, middle, bottom, left, center, or right margins.
All canvas rendering, image vectorization, and PDF stream modifications execute inside client browser memory. Zero files leave your device.
PDF documents measure layout elements in user space units (1/72 inch points) relative to a bottom-left origin coordinate (0,0). When embedding a signature mark, the signature vector or canvas graphic is serialized into a PNG byte stream and stored as an indirect /XObject image dictionary inside the PDF object tree.
Whether drawing freehand, typing calligraphic text, or uploading a signature graphic stamp, pdfDoc.embedPng() generates an internal image resource object. The engine then calculates target coordinates (x, y) based on requested page dimensions and alignment offsets (Left/Center/Right and Top/Middle/Bottom).
Executing page.drawImage() appends a graphics state operator sequence to the selected page content stream without re-compressing underlying document text layers, preserving original document fonts and resolution.