Fast
A simple, focused workflow.
PRIVATE PDF SIGNING
Sign documents.
Keep them private.
Runtime-Hub’s Secure Document Signer
A private, secure document signer for sensitive PDFs. Add your signature and export a signed copy right in your browser.
Secure
PDFs are processed locally.
Private
Made for sensitive documents.
PDF preview
The SignIt workflow
A focused way to finish everyday paperwork.
Sign a PDF without switching between a file viewer, image editor, and separate export tool. SignIt keeps the page preview, signature studio, and final download in one workspace.
Open the document
Choose a PDF from your device or drop it into the preview. Use the page thumbnails to move through longer agreements, forms, or multi-page paperwork.
Prepare each mark
Draw a handwritten signature or import an existing signature, initials, or stamp image. Add more than one mark when a document has several signature fields.
Review and export
Move and resize every mark independently. Check the pages, then download a separate signed PDF while keeping the original file unchanged.
Made for real documents
A practical PDF signer for everyday paperwork.
A visual signature can be useful when a document simply needs a mark placed on the page. SignIt is designed for focused, one-document-at-a-time work.
Agreements and contracts
Place a handwritten signature on a designated signature line, add initials where needed, and review each page before saving a copy for your records.
Forms and applications
Sign application forms, consent documents, onboarding paperwork, and other PDFs without printing, signing by hand, and scanning the pages again.
Invoices and office paperwork
Add an approval mark or company stamp image to the relevant page. Keep multiple marks separate so each one can be moved or removed on its own.
A controlled signing flow
A little more control on every page.
Independent placements
Add multiple signatures, initials, or imported stamp images to one page. Select a single mark to move, resize, or delete it without disturbing the others.
A clear view of the document
Move between pages with the thumbnail strip. Zoom the preview to position a mark precisely, then return to the full page view before exporting.
Private by design
Your document stays in this tab.
It just works inside this tab, like a native app. We don’t track you, ask for personal details, or need your data. Open a PDF, place your signature, and download your copy — that’s it. Your document stays on your device. The page and its PDF libraries still load over the internet; the PDF contents are not sent to a SignIt file-processing service.
Good to know
Questions, answered.
Practical answers about signing, page placement, supported images, privacy, and signature types.
How do I sign a PDF with SignIt?
Open a PDF in the document preview, choose Draw or Import in the signature studio, then select Add to page. Move the mark into position, resize it if needed, review the pages, and download the signed copy.
Does SignIt upload or store my PDF?
No. SignIt reads the selected PDF in your browser and does not send the document contents to a SignIt processing server or save them to an account. The page and its application libraries are loaded over the network, but your selected PDF is handled in the browser session.
Can I add more than one signature to a page?
Yes. Add multiple signatures or imported marks to the same page. Each item is independent, so you can select, move, resize, or remove one without replacing the others.
Can I place signatures on different pages?
Yes. Use the page thumbnails to move through the PDF. Placements are associated with their page, so a signature on one page does not move when you switch to another.
Can I add a company stamp or initials?
Yes. Use the Import tab to add a PNG, JPG, or WebP image of a stamp, initials, or another mark. It becomes a separate object that can be positioned and resized like a drawn signature.
Can I move and resize a signature after placing it?
Yes. Select the mark and drag it to a new position. Use its corner handle to resize it. On touch devices, drag with a finger or stylus and use the supported pinch gesture on the selected mark.
Does document zoom change signature placement?
No. Zoom changes the preview scale, not the mark's position on the PDF page. You can zoom with the mouse wheel or a touch gesture, then continue positioning the mark.
Can I use SignIt on a phone or tablet?
Yes. The workspace adapts to smaller screens. You can open a PDF, move marks with touch or a stylus, zoom the document with a pinch gesture, and resize a selected mark with the supported touch controls.
Which image formats can I import?
The signature studio accepts PNG, JPG, and WebP images. A simple light background may be removed during preparation, but transparent PNG artwork usually gives the cleanest result for signatures and stamps.
Will SignIt change my original PDF?
No. The original file remains unchanged. SignIt creates a separate signed PDF for download, so you keep the source document as it was.
Is a SignIt mark a certified digital signature?
No. SignIt places a visual signature image into a PDF. It does not verify identity with a digital certificate or create cryptographic evidence that the document has not changed. Use a certificate-backed or qualified signing service when that is required.
Do I need an account?
No account or personal details are required to use the signing workspace. Open the page, work with your PDF, and download the signed copy when ready.
SignIt PDF signer
Sign PDF documents in one browser workspace
SignIt is a browser-based PDF signer for adding visual signatures and stamp images to existing documents. It combines a PDF preview, a signature drawing pad, image import, multi-page navigation, independent placement controls, and PDF export. You can use it for forms, agreements, applications, invoices, and other everyday documents that need a visible signature mark.
The app does not replace a certificate-backed digital signature process. It is a practical way to place a signature image on a PDF and save a separate copy, with the document handled in the current browser session rather than uploaded to a SignIt file-processing service.