Sign PDF Files Online
Sign yourself or request electronic signatures from others. Free, secure, and works on any device — no signup required.
You don't need a $30/month DocuSign subscription to sign your own contracts. PDFWix lets you draw a signature with your mouse or finger, type one in a script font, or upload a transparent PNG of your existing signature. Drop it anywhere on the page, resize, and download. The signature is flattened into the PDF so it stays where you put it across every viewer. For agreements that just need a clear visible mark — NDAs, internal forms, freelance contracts — this is faster than email-back-and-forth or printing-and-rescanning.
or drop PDFs here
Free account keeps your last 30 jobs (filename + tool only — never your files) so you can re-find them later.
🔒 HTTPS · Browser-side processing · 100% free
How to Sign PDF
- 1
Upload your file
Click "Select PDF files" or drag and drop the document into the upload box. Multiple files are supported where it makes sense.
- 2
Configure options
Pick the settings on the right — the defaults work for 90% of jobs, so most users can skip straight to the next step.
- 3
Click "Sign PDF"
PDFWix processes the file instantly in your browser. No upload progress bar, no waiting.
- 4
Download the result
Save the new file to your device. The original file is never modified.
Tips for signing PDFs
Draw on a touchscreen for the most natural signature
A finger-drawn signature on a phone or tablet looks much more authentic than mouse drawing on a laptop.
Save your signature as a PNG
Sign on white paper, photograph, remove background, save once. Reuse the PNG across every contract — consistent and quick.
Date next to the signature
Use Edit PDF to add the date as text right beside your signature. Most contracts expect both.
Need legal proof?
PDFWix produces a visual signature, not a cryptographically signed PDF (PAdES). For legally binding workflows requiring auditable signatures, use a dedicated e-sign service.
Lock it after signing
Run Protect PDF on the signed file to prevent further edits before sending.
Why use PDFWix to sign PDFs?
- Completely free. sign as many PDFs as you need without paying a cent or hitting a paywall.
- No signup required. Skip account creation. Just upload, sign, and download.
- Works on any device. Whether you're on Windows, Mac, Linux, iPhone, or Android — PDFWix runs entirely in your browser.
- Privacy first. Your files are encrypted in transit and automatically deleted from our servers within an hour.
- Lightning fast. Most sign jobs finish in under 10 seconds, even for large files.
- Preserves quality. Text, images, and formatting stay exactly as they were in the original PDF.
Common uses for signing PDFs
- Sign PDF for monthly reports and expense filings
- Sign PDF for academic papers and references
- Sign PDF for contracts and signature workflows
- Sign PDF for ebooks and training manuals
- Sign PDF for tax documents and accountant submissions
Frequently asked questions
Is the PDFWix sign pdf tool really free?
Yes. Sign PDF is 100% free, with no hidden charges, no signup, and no watermarks added to the output.
Are my files safe when I use Sign PDF?
Most processing happens directly in your browser, so your file never reaches our server. When server processing is required, files travel over HTTPS and are processed in memory only — never written to disk.
Will Sign PDF reduce the quality of my document?
No. PDFWix preserves the original quality of your file, including text, images, fonts, and formatting.
Can I use Sign PDF on mobile?
Absolutely. PDFWix works on any device with a browser — phones, tablets, laptops, or desktops. No app installation required.
Do I need to create an account?
No. You can use every PDFWix tool without signing up. An optional free account just keeps a history of your conversions (filename and tool only).