PDF Signature Inserter

Draw or upload your signature, drag it onto any page of a PDF, and download the signed file — entirely in your browser, with zero uploads. Sign a PDF without uploading it anywhere and without printing, signing, and scanning it back in. Draw your signature with a mouse, trackpad, or finger, or upload a signature image, then drag and resize it onto any page — including placing the same signature on multiple pages for documents that need initials throughout. Runs completely offline in your browser tab; your document never leaves your device. (Keyword cross-check: Phase 1's primary "sign pdf online free" turned out to be a poor fit to lead with — it's dominated by free tools, and leading with it would misrepresent this as competing on "free." The long-tail "sign pdf without uploading" / "sign pdf offline" variants matched this product's actual differentiation much better, so that phrase — "sign a PDF without uploading" — was folded directly into the opening sentence above instead.)

What it does

PDF Signature Inserter lets you place a drawn or uploaded signature image onto any page of a PDF and download a real, flattened copy — the kind of thing you need when a client emails a contract and you need to sign and return it the same day, without a printer or scanner.

A concrete example: a freelance consultant gets a one-page services agreement by email at the end of the day. They open the PDF in this tool, draw their signature with a trackpad, drag it onto the signature line, resize it to fit, and download the signed copy — done in under a minute, with nothing ever uploaded anywhere.

What this explicitly does not do: this is not DocuSign, Adobe Acrobat Sign, or HelloSign/Dropbox Sign. It does not produce a legally-binding e-signature with an audit trail, timestamp certificate, or signer identity verification. It places an image of a signature onto a PDF, the same way you'd paste a signature into a document by hand — nothing more. If you need a legally certified e-signature for a formal transaction, use one of those platforms instead; this tool is for the much more common everyday case of "I need my signature to visually appear on this PDF," not a certified legal signing ceremony.

It's also worth being upfront that genuinely free alternatives exist for this exact narrower job: macOS Preview has a built-in signature tool, and several free, open-source, browser-based tools do the same no-upload signing this one does. This tool's case isn't "nothing else can do this" — it's a single, permanent, offline file you already own and trust, with a signature-placement workflow (draggable, resizable, place-on-multiple-pages) built specifically for this one job.

Features

• Draw a signature with mouse, trackpad, or touch, or upload a PNG/JPG signature image instead.
• Drag and resize the signature freely on any page, with visible handles while you're adjusting it.
• Place the same signature on multiple pages in one session — built for documents that need initials on every page, not just a single signature line.
• Zero uploads: the PDF and your signature never leave your browser tab, verified to make zero network requests during use.
• Works on a real multi-page PDF in well under 100ms per page — no lag while you navigate a longer document.
• Clear, specific error messages for a non-PDF file, a corrupted file, or a password-protected PDF, instead of silent failure.

Browser support

FAQ

Does my document get uploaded anywhere?
No. This tool runs entirely inside your browser tab. It was built and verified to make zero network requests once the page is open — measured directly by logging every request during a full sign-and-download session, not just assumed from how it was written.

Is this legally binding, like DocuSign?
No, and it's important to be clear about that before you buy. This places an image of your signature onto a PDF — it does not produce a certified e-signature, audit trail, or timestamp the way DocuSign, Adobe Acrobat Sign, or Dropbox Sign do. For a formal legal transaction that requires certified e-signature, use one of those platforms instead.

Can I sign on a touchscreen?
Yes. Signature drawing and repositioning both work with touch input, not just a mouse — this was specifically tested, not just assumed because the code "should" support it.

Can I use this for client or commercial work?
Yes — see the license terms below.

Is there a subscription?
No. This is a one-time purchase, not a subscription — unlike every real e-signature platform in this category.

What happens to my file if I lose the download?
Nothing is stored anywhere by this tool — there's no account and no server-side copy. If you lose the downloaded signed PDF, you'll need to open your original file again and re-sign it.

What if my PDF is password-protected?
Not supported yet — you'll see a clear message asking you to remove the password first (for example, in Preview: File → Export, then uncheck Encrypt) and try again.

Try it free in your browser → Open the free version of this tool — runs entirely in your browser, nothing uploaded.