CanDoYaRuns entirely in your browser - no upload, no sign-up.
Add your PDF, draw a signature with a mouse, stylus, trackpad, or finger, then click the page where it belongs. Adjust its width and download the signed copy. The document and signature stay in your browser. This creates a visible electronic signature, not a certificate-based digital signature.
This PDF signer places your handwritten mark as a transparent image without flattening every page into a screenshot. Existing text and vectors remain intact, though the PDF bytes are rewritten when the new copy is saved.
The tool is designed for adding your own visible signature to an unencrypted document. It does not request signatures from other people, prove who signed, add an audit trail, or issue a cryptographic certificate.
No. The browser reads the PDF, renders its pages, crops the drawn signature, and writes the downloadable copy on your device. CanDoYa does not receive either file. The page loads its PDF libraries as site assets, but signing does not post your document to a processing server.
Yes. You can draw, place, and download a visible signature without an account, payment, watermark, or task quota. The tool handles one PDF and one signature placement at a time. Browser memory and the fixed 100 MB and 1,000-page safety limits still apply.
The input can be up to 100 MB and 1,000 pages. PDF editing may temporarily use several times the source size because the browser holds the input, page preview, signature image, and output. Large files often work better on a laptop than on a memory-constrained phone.
It can show intent, but legal effect depends on the document, consent, identity evidence, process, and local law. This tool does not verify the signer or produce an audit trail. For high-value contracts, regulated forms, or disputed transactions, use a suitable signing service and obtain legal advice.
An electronic signature is a broad way to show agreement, including a drawn or typed mark. A digital signature is a cryptographic PDF feature that uses a certificate to identify a signer and reveal later changes. This tool adds the first kind as a visible image; it does not issue certificates.
Not directly. The tool rejects encrypted PDFs because it does not ask for or store document passwords. If you are authorized to edit the file, open it with the correct password in trusted software, save an unencrypted working copy, and add that copy to the signer.
The signature is added as a transparent image on the chosen page. Other pages are not rasterized, and existing text and vectors are not deliberately recompressed. The saved file can still differ in size or internal structure, so inspect the downloaded copy before sending or archiving it.
Do not assume so. Adding another visible mark changes the PDF bytes and can invalidate a certificate-based signature that covered the earlier version. Keep the original signed file unchanged. If a document already has cryptographic signatures, use a signing workflow designed for incremental certified updates.