Sign PDF Online Free — Add Your Digital Signature Securely
Draw, type, or upload your signature to PDF documents online for free. Create legally binding electronic signatures locally in your browser with zero uploads.
25M+
Docs Merged
TLS 1.3
Client Encrypted
0 Logs
Processed in RAM
You can securely sign a PDF for free by using the EditPDFKit Sign Tool. Just drag your document in, choose to draw your signature, type it in a cursive font, or upload an image of your signature. Once placed, export the file. Since this happens client-side, your signature and document are never sent to external servers.
6 Sign PDF Studio Superpowers (Unlimited Free Signatures)
Legally binding digital contracts signed in seconds directly in your web browser.
DocuSign charges $120/yr and iLovePDF restricts signatures behind accounts. EditPDFKit provides unlimited client-side signing for free.
1. Three Signature Modes (Draw, Type, Upload)
Draw your signature on touchscreens, type realistic cursive calligraphy, or upload a photo of your pen signature.
2. Auto Paper Background Removal
When uploading photos of your signature, our engine isolates your dark pen strokes and removes white paper backgrounds.
3. ESIGN & eIDAS Compliance
Meets international electronic signature guidelines for commercial contracts, leases, NDAs, and invoices.
4. Permanent Vector Flattening
Burn signatures directly into the PDF vector layer upon export so signatures cannot be separated or lifted.
5. Mobile Touch-Optimized
Sign contracts on iPhone, iPad, or Android using fingertip or stylus with silky-smooth 60fps canvas drawing.
6. 100% Private Client-Side Signing
Your confidential legal agreements and signature images are processed strictly in local browser memory.
How to Add Digital Signature and Sign PDF Documents Online
Simple 4-step walkthrough for fast, secure processing
Import Your Document
Drag your PDF contract or form directly into the browser window.
Generate Your Signature
Select your preferred method: freehand drawing, typing in cursive, or uploading a scanned signature image.
Adjust and Position
Drag the generated signature over the designated line on your document and resize it to fit perfectly.
Export the Final PDF
Click to download. The signature is permanently flattened onto the document, preventing future edits.
EditPDFKit vs. Expensive e-Sign Platforms (DocuSign & Adobe Sign)
Why thousands of privacy-conscious users choose EditPDFKit over cloud converters
| Feature | EditPDFKit (editpdfkit.com) | Commercial e-Sign (DocuSign, Adobe Sign) |
|---|---|---|
| Where Files Are Processed | Directly on Your Device (Zero Uploads) | Uploaded to Remote Company Servers |
| Privacy & Safety | Zero Uploads • Files Never Leave Your Device | Files Uploaded Across the Public Internet |
| Signature Asset Custody | Drawn signatures stored exclusively in local browser sandbox | Signature bitmaps saved and stored on cloud databases |
| Built-in Privacy Vault | Saved Privately on Your Device (View or delete anytime) | Saved on Cloud Servers (Cannot verify if or when deleted) |
| Daily Usage Limits | 100% Unlimited & Free Forever | Paywalled (Only 2–3 files per day free) |
| File Size Limits | No Limits (Process files of any size) | Strict Limit (15 MB – 50 MB unless you pay) |
| Works Without Internet | Yes • 100% Offline (Works without Wi-Fi) | No • Fails without constant internet connection |
| Account & Sign In | No Signup • No Login • Zero Email Required | Forces you to create an account or give email |
| Watermarks on Your Files | 100% Clean • No Watermarks Ever | Stamps watermarks or charges to remove them |
How Sign PDF Works: Keep Your Files Safe & Private
See step-by-step how your files are processed. Everything happens right inside your browser — your files are never uploaded to the internet or shared with anyone.
1. Open on Your Device
When you pick a file, your browser opens it directly on your computer or phone. Your document stays on your device and is never uploaded anywhere.
2. Process in Your Browser
Your device does all the work right inside your browser. Because there are no server queues or waiting lines, your files are processed instantly.
3. Save in Private Vault
When you save your work, your file is stored securely inside your browser's private vault on your device. You can view or reopen it anytime, even without internet.
4. Download, Reuse, or Delete
Download your finished file, send it directly to another tool without re-uploading, or click 'Clear Vault' to permanently erase your files anytime with one click.
How You Can Prove Your Files Never Leave Your Device
Open this tool, turn off your Wi-Fi or turn on Airplane Mode, and drop your file. It will still edit, convert, or compress and let you download the result! This proves the tool works completely offline without sending anything to any server.
Press F12 on your keyboard (or right-click anywhere and choose "Inspect"), click on the Network tab, and process your file. You will see 0 bytes of your file sent over the web — absolute proof of 100% privacy.
Digital Signature Standards, Canvas Smoothing & Export Specs
Key features, device compatibility, and supported file types
Runs Directly on Your Device
Processed by your browser with zero waiting or upload lag
100% Private (0 Files Uploaded)
Safe for bank statements, IDs, tax forms, and confidential files
100% Watermark-Free
Clean original documents ready for official submissions
Drag & drop or paste directly from clipboard (Ctrl+V)
100% Free With No Limits
No account needed, no daily limits, no paywalls
Works on All Phones & Computers
iPhone, Android, Windows PC, Mac, iPad, and Chromebook
Need to Hit an Exact File Size Upload Limit?
Online job boards, immigration visa portals, universities, and court e-filing systems enforce strict KB ceilings. Select a calibrated target size solver below to compress without losing readability.
Legal & Court Portals
Strict compliance while keeping vector text razor sharp.
Job Portals & Submissions
Targeted ceiling for international and corporate submissions.
Job Portals & HR Forms
Ideal for resume attachments, certificates, and multi-page scans.
Email & Universities
Reduces large PDF decks under standard mail attachment limits.
Any Custom Limit
Set an exact target size with interactive compression preview.
Looking for a Free Alternative to Popular Cloud Tools?
Unlike cloud-based services that upload your files to remote servers or enforce hourly limits, EditPDFKit runs 100% in your browser.
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Frequently Asked Questions About Signing Documents Online
Everything you need to know about Sign PDF on editpdfkit.com