Add Signature to PDF Online Free

Add digital signature to PDF - No signup, No watermark, Fast & Secure

✓ 100% Free ✓ No Signup ✓ No Watermark ✓ Secure

1. Upload PDF

Drag & drop file PDF di sini

ATAU

Maksimal 50MB • Format: PDF

2. Upload Tanda Tangan

Drag & drop gambar PNG di sini

ATAU

Format: PNG • Background transparan

100%

How to Sign PDF Online

Our free online PDF signature tool makes it easy to add your digital signature to any PDF document. Whether you need to sign contracts, agreements, invoices, or any other document, our intuitive drag & drop interface allows you to position your signature exactly where you need it.

  1. Upload PDF: Click the upload area or drag your PDF file into the converter. Maximum file size 50MB.
  2. Upload Signature: Upload your signature image in PNG format with transparent background for best results.
  3. Adjust Size: Use the slider, manual input, or drag corners to resize your signature to the perfect size.
  4. Position Signature: Drag & drop your signature to the exact position on the PDF preview.
  5. Save Position: Click "Save Position" button to save the signature coordinates and size.
  6. Generate PDF: Click "Generate PDF" to create your signed document.
  7. Download: Download your signed PDF instantly - no watermark, completely free.

Why Use Our Free PDF Signature Tool?

  • 100% Free: No hidden costs, no premium plans, no subscriptions. Completely free forever.
  • No Signup Required: Start signing PDFs immediately without creating an account or providing email.
  • No Watermark: Your signed PDF will be clean without any watermarks or branding.
  • Fast Processing: Sign and download your PDF in seconds with our optimized processing.
  • Secure & Private: Files are automatically deleted after 24 hours. We never access or share your documents.
  • Easy to Use: Intuitive drag & drop interface - no technical skills or software installation needed.
  • Works Everywhere: Compatible with all devices - desktop, tablet, and mobile browsers.
  • Precise Positioning: PDF preview with drag & drop for pixel-perfect signature placement.
  • Flexible Resizing: Three resize methods - drag corners, slider, or manual input.

Creating Your Signature Image

Method 1 - Scan or Photo: Sign on white paper with black ink, scan or take a clear photo, then use background remover to remove the background. Download as PNG with transparent background.

Method 2 - Digital Drawing: Use a drawing tablet or touchscreen device to create your signature digitally. Save as PNG format.

Method 3 - Online Signature Generator: Use online tools like SignWell or DocuSign to create a digital signature, then export as PNG.

Tips for Best Results

  • Optimal Size: 300x150px or 400x200px works best for most documents
  • Transparent Background: Use PNG format with transparent background for professional appearance
  • High Contrast: Black or dark blue signature on transparent background is most readable
  • Quick Resize: Drag signature corners for visual resizing with real-time feedback
  • Precise Positioning: Zoom browser (Ctrl/Cmd +) for pixel-perfect placement
  • Preview First: Check the preview before generating to ensure correct position
  • Multiple Documents: After signing, upload another PDF to sign more documents

Common Use Cases

Business Contracts: Sign employment contracts, service agreements, and business proposals without printing and scanning.

Legal Documents: Add your signature to legal agreements, NDAs, and consent forms quickly and securely.

Invoices & Receipts: Sign invoices, receipts, and financial documents for professional appearance.

Application Forms: Complete and sign application forms, registration documents, and official paperwork.

Remote Work: Sign documents from anywhere - perfect for remote workers and digital nomads.

Signature Positioning Features

  • Drag & Drop: Click and drag signature to any position on the PDF
  • Corner Handles: Drag corners to resize while maintaining aspect ratio
  • Scale Slider: Use slider for proportional scaling from 50% to 400%
  • Manual Input: Enter exact width and height in pixels for precise control
  • Reset Button: Quickly return to default size (150x75px)
  • Real-time Preview: See changes instantly as you adjust size and position

Security and Privacy

Your documents are processed securely with SSL encryption. All files are automatically deleted from our servers after 24 hours. We never access, store, or share your documents. Your privacy is our top priority.

Technical Specifications

Supported Input: PDF files up to 50MB
Signature Format: PNG (transparent background recommended)
Output Format: PDF with embedded signature
Signature Placement: Last page of PDF document
Processing: Client-side PDF preview with PDF.js, server-side generation with FPDI

Related Tools

Frequently Asked Questions

Upload your PDF file, upload your signature image (PNG), drag and drop the signature to the desired position, adjust size if needed, then click Generate PDF. Download your signed PDF instantly.

We support PNG format with transparent background for best results. Recommended size is 300x150px or 400x200px.

Yes! You can resize in 3 ways: drag corner handles, use scale slider, or input manual width/height in pixels.

The signature will be added to the last page of your PDF. You can see the preview and position it precisely.

Yes, all files are processed securely and automatically deleted from our server after 24 hours. We do not store or share your files.

Maximum PDF file size is 50MB. For larger files, please compress them first.

Sign on white paper, take a photo or scan it, then upload to remove.bg to remove the background. Download the result as transparent PNG.

Drag & Drop Interface

Intuitive drag & drop for precise signature positioning. Easy for everyone to use.

Flexible Resize

3 resize methods: drag corners, scale slider, or manual input for full control.

Safe & Private

Files auto-deleted after 24 hours. No watermark, no signup, completely free.