E-Signature PDF Tool
Upload PDF documents and add signatures, stamps and seals instantly online for free.
Download Signed PDF
- ✔Upload PDF files
- ✔Add signatures or stamps
- ✔Drag anywhere freely
- ✔Resize signatures
- ✔Multi-page support
- ✔High quality export
What This Tool Does, and How That Differs from a "Digital Signature"
This tool performs a visual electronic signature: it takes the image you upload and permanently embeds it into the PDF at the exact position and size you place it, producing a new PDF file that looks signed. This is different, technically, from a cryptographic digital signature — the kind used by systems like Adobe Sign or DocuSign for certified documents — which embeds a unique cryptographic hash tied to a certificate authority, allowing anyone who opens the file to verify it hasn't been altered since signing and confirm who signed it.
In practice: for everyday paperwork — internal approvals, quotations, informal agreements, forms you're filling in for yourself — a visual signature like this is exactly what's needed and is how most "sign this and send it back" requests are actually handled. For anything requiring legal certification, tamper-evidence, or a verifiable audit trail (many contracts, notarized documents, some government filings), you'll want a service that produces a cryptographically signed and certificate-backed PDF instead.
Where electronic signatures are legally recognized: in the US, the ESIGN Act (2000) and UETA give electronic signatures the same legal standing as handwritten ones for most contracts, provided both parties consent to signing electronically. The EU's eIDAS regulation similarly recognizes simple electronic signatures, though it distinguishes them from "qualified" electronic signatures (which require certificate-based verification) for higher-stakes documents. Requirements vary by country and document type, so it's worth checking what your specific document needs before relying on a visual signature alone.
The tool renders your PDF page-by-page using PDF.js directly in your browser so you can see exactly where the signature will land before downloading, and lets you drag and resize the signature image freely on any page using an interactive overlay.
Getting a Clean Signature Image Before You Upload
Use PNG with a transparent background
A JPG signature photo will carry a white or off-white rectangle around the signature stroke, which sits visibly on top of the document. A PNG with the background made transparent lets only the ink strokes appear, which looks far closer to a genuine signature on paper.
Photograph on plain, well-lit paper
Sign in dark ink on plain white paper in even lighting, avoiding shadows across the signature. This makes it much easier to cleanly remove the background afterward, and avoids faint gray smudging around the strokes once placed on the PDF.
Crop tightly before uploading
A signature image cropped close to the ink resizes more predictably once placed on the page — a wide image with lots of empty margin makes the signature appear smaller than intended relative to its bounding box when resized.
Keep a consistent signature file for reuse
If you'll be signing multiple documents, save your cropped, transparent signature PNG somewhere convenient — reusing the same clean file keeps every signed document looking consistent, rather than re-photographing your signature each time.
How to Use the E-Signature Tool
Upload PDF
Upload your PDF document instantly.
Upload Signature
Upload PNG or JPG signature image.
Place Signature
Drag and resize signatures freely.
Download PDF
Download final signed PDF instantly.
Frequently Asked Questions
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