Sign PDF.
Add your signature to any PDF document. Draw, type, or upload — free and private, no upload required.
Let's get started — pick your PDF files
or drag and drop them right here
Pick your files
Select your PDFs — they stay on your device the whole time.
Your browser does the work
Everything runs inside your browser. Nothing is sent to a server. Not a single byte.
You're all set
Save your result instantly. No waiting, no account, no strings attached.
Built different. On purpose.
Professional PDF tools with no server, no cloud, and no compromise on your privacy.
Privacy is the product
Your files live in your browser's memory and vanish the moment you close the tab.
Your device. Your rules.
We use your hardware, not our servers. That means zero exposure to anything outside your machine.
Honest about money
PDF Safe is free and ad-free, sustained by the developer. We may add ads later, but your data will never be part of the business model.
Sign PDF — add your signature safely and locally
Sign PDF documents — no uploads, no servers. Add your signature or initials right in your browser. Draw, type, or upload a signature image. Free and completely private.
When to use
Use the PDF signing tool whenever you need to add your signature to a document without printing it first — from contracts and agreements to permission slips and tax forms. It replaces the print-sign-scan cycle with a direct digital signature.
Who uses this
Remote Workers
Sign employment contracts, NDAs, and freelance agreements without printing and scanning.
Real Estate Agents
Add signatures to purchase offers, lease agreements, and disclosure forms on the go.
Students
Sign financial aid forms, enrollment documents, and internship agreements digitally.
Small Business Owners
Sign vendor contracts, purchase orders, and partnership agreements from any device.
Sign your PDFs — privately and professionally
Easily add your signature to any PDF document. Whether it's a contract, an application, or an agreement — sign documents professionally and quickly. Unlike other signing services that upload your document to their servers, PDF Safe processes everything in your browser. Your signature and your document never leave your device — making this the most private way to sign a PDF online.
Three ways to add your signature
Draw your signature: Use your mouse, trackpad, or touchscreen to draw your signature directly on the screen. This is the most natural approach — works especially well on tablets with a stylus. Type your signature: Enter your name and choose a script-style font. Quick and professional-looking, ideal for internal documents and routine agreements. Upload a signature image: Use a pre-made PNG image of your handwritten signature. If you sign documents frequently, this is the fastest option — create the image once and reuse it for every document.
How to add a signature to a PDF on your device
1. Open the Sign PDF tool and drag your document onto the page. 2. Choose your signature method: draw, type, or upload an image. 3. Click on the page where you want to place the signature. 4. Resize and reposition as needed. 5. Click Apply to render the signature onto the PDF. 6. Download the signed document to your device. No account required. No file size limit. Nothing is sent to any server.
Your documents never leave your device
Documents sent for signing often contain sensitive information — employment contracts, NDAs, lease agreements, financial disclosures. These should never be stored on third-party servers. Browser-based signing works differently: 1. Your PDF loads directly into browser memory 2. You create or upload your signature 3. The signature is rendered onto the page locally 4. The signed PDF is written directly to your device Nothing is transmitted. The document never leaves your machine.
Tips for professional-looking signatures
Use a stylus on a tablet for the best result: Drawing your signature on an iPad or Android tablet with a stylus produces the most natural-looking signature. A mouse works but tends to create shakier lines. Prepare a signature image in advance: Sign in black ink on white paper, photograph it, crop tightly, remove the background, and save as a transparent PNG. Create this once and reuse it forever. Position precisely: Place your signature on the designated signature line. Zoom in for precise placement on the page. Flatten after signing: Use the Flatten PDF tool to make the signature permanent — it becomes part of the page content and can't be moved or removed. Recommended before sending signed documents to others.
Signing PDFs on mobile
The signing tool works on any device with a modern browser. On mobile, draw your signature with your finger or stylus directly on the touchscreen. On iOS, open the tool in Safari, load your file from Files or iCloud Drive, draw your signature, and download the signed PDF to your device. On Android, the process is identical in Chrome. The signed file saves to your Downloads folder and can be shared immediately. No app installation required — it works right in your mobile browser.
Questions people actually ask
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Password Protect PDF
Keep your PDF safe with a password — AES-256 encryption included. Free, local processing, no upload required.
Unlock PDF
Remove a PDF password and save a decrypted copy. Your file stays on your device — nothing is uploaded.
Flatten PDF
Make signatures and form fields permanent. Free browser tool, your file never leaves your device.
Redact PDF
Permanently black out text, images, and logos in your PDF. Draw shapes to redact, censor, or mask content and the data underneath is destroyed, not just covered. Free and private, no uploads.