Sign PDF Online Free – Add Your Signature to PDF

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Select or Drop PDF File

Add your handwritten signature, typed calligraphy, or uploaded image signature directly to any PDF page. 100% private in your browser.

Supports contracts, agreements, invoices, forms & legal PDFs

100% Client-Side Privacy — Your PDF & signature never leave your device

Sign PDF Online Free – Add Electronic Signatures & Form Fields

SnapFreeTools Sign PDF is a free, privacy-first online tool that allows you to easily create and place electronic signatures, initials, dates, names, text, and official company stamps onto PDF documents directly in your web browser. The PDF pages are not rasterized; original text, vector graphics, images, and page structure remain intact. Everything runs 100% locally on your device without server uploads.

How to Sign and Fill a PDF Document Online

Signing agreements, contracts, rental forms, or invoices takes just a few clicks without requiring printing or scanning:

Upload PDF: Drag and drop your PDF file into the secure workspace.
Select Fields: Choose from the field palette to add a Signature, Initials, Name, Date, Custom Text, or Company Stamp.
Position & Resize: Drag fields to the exact location on any page, resize using corner handles, or rotate if needed.
Customize Properties: Adjust font sizes, ink colors, typography styles, or date formats in the properties panel.
Download Signed PDF: Click Sign & Download PDF to receive your signed document instantly.

Supported PDF Form Fields

Signature Field

Draw smoothly, type cursive calligraphy, or upload handwritten signature PNGs with automated whitespace trimming.

Initials Field

Generate 1–4 letter monogram or calligraphy script initials to sign every page of legal agreements quickly.

Name Field

Place the signer's full name with custom font family (Helvetica, Times, Courier), font size, and color.

Date Field

Auto-stamp today's date or pick a custom date in ISO (YYYY-MM-DD), European (DD/MM/YYYY), or US (MM/DD/YYYY) formats.

Custom Text

Add single or multiline remarks, notes, titles, addresses, or department numbers with automatic word wrapping.

Company Stamp

Upload official organization seals or company logo stamps with transparent PNG support.

Multi-Page Navigation & Coordinate Accuracy

Need to sign on multiple pages or initial every page? Our visual multi-page navigator lets you switch between pages effortlessly. Every field's position, width, height, and rotation are mathematically translated from browser screen coordinates to exact PDF vector space, ensuring the downloaded document perfectly reflects your preview.

Electronic Signatures vs. Cryptographic Digital Signatures

Technical & Product Distinction

Electronic Signatures (This Tool): Refers to placing a visual representation of your handwritten, typed, or image signature onto a document. This is widely used for everyday agreements, freelance contracts, internal approvals, permission forms, and invoices.

Cryptographic Digital Signatures (PKI / Certificate-Based): Uses public-key cryptography and digital certificates issued by a Certificate Authority (CA). SnapFreeTools Sign PDF provides visual electronic signature placement and form filling; it does not issue cryptographic PKI digital certificates or Qualified Electronic Signatures.

100% Client-Side Privacy & Security

Your confidential legal documents, financial contracts, and personal signatures should never be uploaded to third-party cloud servers. SnapFreeTools runs entirely in your browser:

Zero server uploads or remote file storage in Only Me mode
Your PDF content and signature remain strictly on your device
No email registration or personal account required
Works completely offline after initial page load

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Frequently Asked Questions

Upload your PDF into our Sign PDF tool, choose 'Only Me', create a signature by drawing, typing, or uploading an image, position and resize the signature on your chosen page(s), then click 'Sign & Download PDF' to get your signed document instantly.

You can place Signatures, Initials (monograms or short scripts), Signer Names, automated Date stamps, customizable Text fields (single or multiline notes), and official Company Stamps or logo seals.

Yes. Use the Initials field from the toolbox, customize your 1–4 letter monogram style, and place it on any page. You can duplicate or move initials across pages using the thumbnail sidebar.

Yes. Our tool allows you to place visual electronic signatures, text, and dates directly onto your PDF inside your browser, eliminating the need to print, sign on paper, and scan it back into a computer.

No. SnapFreeTools processes your PDF and form fields entirely on your local device using client-side JavaScript. Your confidential documents, agreements, and signatures never leave your browser.

Yes. You can draw your signature naturally using a finger on a mobile phone or tablet, a stylus pen, or a computer mouse with full stroke smoothing and ink color options.

Yes. You can type your name and select from multiple calligraphy script styles. The tool generates a crisp, transparent vector-grade signature image automatically.

Yes. You can upload PNG, JPG, or WebP signature and stamp files. Transparent PNG images work best and blend naturally over contracts without modifying original document vectors.

No. The PDF pages are not rasterized. Original selectable text, vector graphics, images, and document structure remain intact to the extent supported by PDF standards. Form fields and signatures are embedded directly as overlay elements.

Yes. You can navigate through any page in a multi-page document using the left thumbnail sidebar, placing unique signatures, initials, or text notes on as many pages as you need.

Yes. Click on any placed signature, stamp, or initials to drag, resize using the corner handle, or rotate in 90-degree increments.

An electronic signature (provided by this tool) is a visual signature placed on a PDF for standard business, rental, and freelance agreements. A cryptographic digital signature involves public-key cryptography (PKI) and Certificate Authority digital certificates.

If your PDF is password-protected or encrypted, you must first unlock it using our free Unlock PDF tool, then upload the unlocked PDF here to add your signature.

Yes. SnapFreeTools Sign PDF is fully responsive and touch-optimized for iPhones, iPads, Android smartphones, tablets, and laptops.

No. SnapFreeTools is 100% free with no account creation, no watermarks, and no daily file signing limits.

Yes. We generate standard-compliant PDF documents that open seamlessly in Adobe Acrobat Reader, Apple Preview, Google Chrome, Microsoft Edge, and all major PDF viewers.

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