Need to sign a contract, an offer letter, a lease agreement, or a consent form — without printing, scanning, or installing any software? Electronic PDF signatures are fully legal in most countries and take less than 60 seconds to apply. This guide covers every free method to sign a PDF online or offline, from drawing your signature with a mouse to generating a legally binding digital certificate — all without a printer in sight.
4 Types of PDF Signatures Explained
Before choosing a method, understand the four signature types — they differ in how they look, how they're created, and their legal standing:
Method 1 — ProPDFMaker Sign PDF (No Upload, Any Device)
ProPDFMaker's Sign PDF tool lets you draw, type, or upload a photo of your signature and place it anywhere on your PDF — entirely inside your browser. Your document is never uploaded to any external server at any point. Supports adding multiple signatures, initials, dates, and text fields. Works on desktop, tablet, and mobile.
- Open the ProPDFMaker Sign PDF tool in any browser on any device.
- Click Choose File or drag and drop your PDF into the tool. The document opens in the browser-based editor.
- Click Add Signature from the toolbar. Choose your method: Draw (mouse or finger), Type (cursive font), or Upload Image (photo of handwritten signature).
- Create your signature and click Apply.
- Drag your signature to the correct position on the page. Resize using the corner handles. Add initials or date fields if needed.
- Click Download Signed PDF to save the completed document to your device.
Method 2 — Adobe Acrobat Reader (Free Desktop App)
Adobe Acrobat Reader — the free version — includes a fully functional Fill & Sign tool that lets you type, draw, or upload a signature and place it anywhere in any PDF. It runs entirely offline with no file upload. Signatures are saved for reuse across future documents. See Adobe's official Sign PDF guide for full details.
- Open your PDF in Adobe Acrobat Reader (free download at get.adobe.com/reader).
- Click Fill & Sign in the right-hand Tools panel (or go to Tools → Fill & Sign).
- Click Sign in the toolbar that appears, then select Add Signature.
- A popup offers three options — Type (cursive font), Draw (mouse/trackpad), or Image (upload photo). Create your signature and click Apply.
- Click where you want the signature placed on the document. Drag to reposition, or use the resize handles to scale it.
- Save the signed PDF via File → Save As — save as a new file to preserve the original unsigned version.
Method 3 — Smallpdf eSign PDF (Free Online)
Smallpdf's eSign PDF tool lets you upload a PDF, draw your signature, add initials and date fields, and download the signed document — all for free with no printing or scanning. Smallpdf is GDPR compliant and ISO/IEC 27001 certified. It deletes uploaded files from their servers within 1 hour of processing.
- Visit smallpdf.com/sign-pdf in your browser.
- Click Choose File or drag and drop your PDF onto the page.
- Click Add Signature — draw, type, or upload an image of your handwritten signature.
- Place your signature on the relevant page, then add text, initials, or date stamps as needed.
- Click Finish & Sign to finalise, then download the signed PDF.
Method 4 — iLovePDF Sign PDF (Free, Batch & Request Signatures)
iLovePDF Sign supports two workflows: signing a document yourself instantly (no account needed), or sending the document to multiple signers by email with tracked signing status. It provides a complete eSignature workflow for teams and businesses — making it the most versatile free option for multi-party signing on this list.
Sign It Yourself (No Account):
- Go to ilovepdf.com/sign-pdf and click Only Me.
- Upload your PDF and click Sign PDF.
- Choose Signature, Initials, or Stamp from the panel on the right.
- Draw, type, or upload your signature, then place it on the document.
- Click Finish and download the signed PDF.
Request Signatures from Others:
- On the iLovePDF Sign page, select Multiple Signers.
- Upload the PDF and add each signer's name and email address.
- Place signature fields for each signer on the relevant pages.
- Click Send for Signature — each signer receives an email and signs online. You are notified when all parties have signed.
Method 5 — Sejda Fill & Sign (Free, No Registration)
Sejda's Fill & Sign tool is completely free with no watermarks and no registration required. It combines PDF form filling with signature placement in a single interface — ideal for filling in form fields AND adding your signature to the same document in one step. Uploaded files are deleted automatically after 2 hours.
- Visit sejda.com/sign-pdf and click Upload to select your PDF.
- Once the document loads, click Sign in the top toolbar, then Add Signature.
- Choose from three creation methods: Type your name (cursive), Draw (mouse/touchscreen), or Upload an image.
- Create your signature and click Save, then click on the page where you want it placed.
- Fill in any remaining form fields using the text tool, then click Download to save the completed, signed PDF.
Method 6 — PDF24 Sign PDF (Free, Desktop & Online)
PDF24's Sign PDF tool is available both as a free online tool and as a Windows desktop app that runs fully offline. It has no file size limits, no watermarks, and no daily caps. The desktop version is the best choice for users who regularly sign documents and need a fully offline, no-upload solution on Windows.
Using PDF24 Online:
- Go to tools.pdf24.org/en/sign-pdf.
- Upload your PDF and wait for the editor to open.
- Click Add Signature and draw, type, or upload your signature.
- Place the signature on the page and adjust size as needed.
- Click Save and then download the signed PDF.
Using the PDF24 Desktop App (Offline):
- Download the free PDF24 Creator desktop app for Windows.
- Open PDF24 → select Sign PDF from the toolbox.
- Open your PDF and add your signature using Draw, Type, or Image upload.
- Save the signed file — entirely offline, no internet required.
Method Comparison at a Glance
Use this table to pick the right signing method based on your privacy needs, device, and whether multi-party signing is required.
| # | Method | Free | No Upload | No Sign-Up | Multi-Party | Mobile |
|---|---|---|---|---|---|---|
| 1 | ProPDFMaker Sign | ✅ Yes | ✅ Yes | ✅ Yes | ✗ No | ✅ Yes |
| 2 | Adobe Acrobat Reader | ✅ Free tier | ✅ Desktop | ⚠️ Account needed | ⚠️ Pro only | ✅ App |
| 3 | Smallpdf eSign | ✅ Free tier | ✗ Uploads | ✅ Yes | ⚠️ Pro only | ✅ Yes |
| 4 | iLovePDF Sign | ✅ Free tier | ✗ Uploads | ✅ Solo signing | ✅ Yes (free limit) | ✅ Yes |
| 5 | Sejda Sign | ✅ Yes | ✗ Uploads | ✅ Yes | ✗ No | ✅ Yes |
| 6 | PDF24 Sign | ✅ Yes | ✅ Desktop app | ✅ Yes | ✗ No | ⚠️ Online only |
How to Create a Clean Signature Image for Upload
If you prefer to use an image upload so your digital signature exactly matches your real one, follow these steps to create a clean, high-quality signature image:
- Use white paper and a dark pen — black or dark blue ink provides maximum contrast. Avoid ruled paper; plain white gives the cleanest result.
- Sign large — sign bigger than you normally would. Larger signatures photograph with more detail and scale down more cleanly than small ones scaled up.
- Photograph in good lighting — natural daylight works best. Avoid shadows across the signature. Take the photo directly above the paper, not at an angle.
- Crop tightly — use your phone's photo editor to crop right to the edges of your signature, removing all excess white space.
- Save as PNG with white background — PNG preserves sharp edges. If your tool supports it, use a transparent background so the signature blends naturally over any PDF.
- Remove the background (optional) — free tools like remove.bg can strip the white background, leaving just the signature strokes on a transparent layer — ideal for clean overlaying on any PDF.