Add a visible signature with a clear understanding of its limits
A signature on a PDF can mean different things in different workflows. Sometimes a recipient wants a visible mark in a signature box. In other cases, the document must include a certificate-backed digital signature with verifiable identity and tamper evidence. This tool handles the first task: placing a drawn, typed, or uploaded signature image on a selected PDF page. It does not issue a certificate, authenticate your identity, or create a third-party signing audit trail.
Before editing an agreement, ask the receiving party what form of signature is acceptable. A visible mark may be sufficient for a routine acknowledgment but inappropriate for a regulated filing or a contract that must follow an approved signing process. The legal effect of a signature depends on jurisdiction and circumstances beyond the image itself. Do not interpret a successful export as a statement that a document has become legally valid or independently verified.
Choose a signature source that suits the document
Drawing is convenient when you have a touch screen, pen, or pointing device. A typed name is easier to read but may not resemble a handwritten signature. Uploading an existing image is useful when you already have a suitable signature graphic that you are authorized to use. A transparent PNG generally places more cleanly over a document than a photograph with an opaque white rectangle behind it.
Use only your own signature or one that you have explicit authority to apply. An image of another person's handwriting is not evidence of their consent. Keep signature graphics in a controlled location and avoid leaving them in shared downloads folders. For uploaded images, crop unnecessary margins before use so that the visible stroke occupies a useful portion of the placement box. Drawing and typing here produce a graphic, not a biometric identity check or a handwriting verification service.
Position the signature precisely on the correct page
Load the document, choose the relevant page number, and review the page preview before positioning a mark. The signature width is expressed as a percentage of the page. Left and top controls provide predictable placement, while selecting a point on the preview offers a faster starting position. Check that the entire signature stays inside the page and does not cover a date, printed name, clause, or other important content.
Documents with mixed page sizes or orientations deserve additional care. A placement that is sensible on one page may not be appropriate on another. The tool adds the mark to the selected page only; it does not assume that every page needs the same signature. Password-protected documents are not supported by this workflow. Use an authorized unlocked copy instead of attempting to bypass restrictions, and keep any existing certificate-signed original intact because later edits may invalidate its verification status.
Check the downloaded document before sending it
Open the exported PDF in a separate reader and examine the signature at ordinary reading size. Look for clipping, an unexpectedly large background rectangle, or placement on the wrong page. Confirm that the document still has the expected number of pages and that the surrounding text remains legible. A signature that looks small in an on-screen preview may be acceptable on the final page, while one that looks striking at high zoom may be oversized in print.
Save the result under a distinct filename and send it through the channel agreed with the recipient. If the document requires a signing date, printed name, witness, or other field, complete those requirements using the appropriate document workflow rather than assuming the visible mark covers them. For a high-value agreement, consider a signing service that provides identity verification, timestamps, consent records, and a tamper-evident final file. Those features are materially different from putting an image on a page.
If a reviewer asks who signed or whether the document changed afterward, this tool's output alone cannot answer. Preserve the supporting correspondence and follow the organization's document policy. Never represent a browser-added image signature as a verified certificate signature.
Keep the original document and review the export
Save an untouched copy of a PDF before making changes. A useful filename should distinguish the working document from the version you intend to send. Open the exported file in another PDF reader and check the affected page at normal viewing size and at higher zoom. Also confirm that the page count and orientation still match the source. A successful download tells you that a file was produced; it does not replace document review.
This tool processes selected documents in the browser rather than sending their contents to a signing service. Local processing does not create an identity record, a secure delivery trail, or proof that another person accepted the document. Downloaded files and image signatures remain sensitive artifacts on your device. Remove temporary copies from shared computers and follow your organization's retention policy.
PDF files can contain interactive forms, embedded attachments, existing digital signatures, unusual fonts, and restricted content. A general browser editor may not preserve every specialized feature exactly as a professional document system would. For high-value agreements, regulated records, or documents with an existing certificate signature, use the receiving party's approved process. Ask what kind of signature is required before changing the file, and keep the original evidence with the final document.
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Frequently asked questions
Is this a digital certificate signature?
No. It adds a visible signature graphic to a PDF. It does not authenticate the signer, create a certificate, or provide an independent audit trail. Use a certificate-based or approved e-signature service when the recipient requires those features.
Can I sign a password-protected PDF?
This tool expects an accessible, authorized document. Obtain an unlocked copy through a legitimate process before editing. Do not use PDF modification to bypass restrictions or to alter an agreement you do not have permission to change.
Why should I keep the unsigned original?
The original preserves the document before modification and helps you review changes or restart the workflow. It is especially important when a file already contains digital signatures, interactive fields, or other features that may be affected by subsequent editing.
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Reference and further reading
Adobe's explanation of certificate-based PDF signatures provides background on the relevant format, technology, or requirements. External services have their own policies and may change independently of this page.