Sign PDF online
Sign PDF documents electronically in your browser. Draw, type, or upload your signature — free, private, no account needed.
Drop a PDF file here
or click to select a PDF to sign
Signature method
Draw your signature below
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How to sign a PDF document
Upload the PDF you need to sign by dragging it into the drop zone or selecting it from your device. Create your signature by drawing with a mouse or finger, typing your name, or uploading a signature image. Place the signature on the document where required — you can resize and reposition it. Click "Sign PDF" to apply the signature and download the signed file.
Your document and signature are processed locally. Nothing is uploaded to a server, keeping contracts and personal paperwork confidential.
Why choose SnapKit? Our tools are 100% Private, No Server Upload, Instant Browser-Based, with No File Size Limit — plus free ringtone and video makers. Whether you merge PDFs, convert HEIC photos, or trim MP4 clips, your files stay on your device with zero cloud storage.
Why choose SnapKit?
Every tool is built around four promises: privacy, speed, freedom, and accessibility. No cloud pipeline — just your browser and your files.
100% Private — No Server Upload
Files are processed on your device with client-side WebAssembly and Canvas. No bytes are sent to our servers.
Instant Browser-Based speed
Skip slow uploads and downloads. Your CPU and GPU do the work locally for near-instant results.
No File Size Limit — Free forever
No registration walls, no watermarks, and no arbitrary caps. Use ringtone, video, PDF, and image tools freely.
Works on every device
iPhone, Android, Windows, and Mac browsers are all supported with the same private, instant experience.
Frequently asked questions
Is an electronic PDF signature legally valid?
Electronic signatures are widely accepted for many business and personal documents. For legally binding agreements, check the e-signature laws that apply in your country or industry.
Can I sign a PDF on my phone?
Yes. Open the tool in your mobile browser, upload the PDF, draw your signature with your finger, and download the signed document.
Does signing PDF require an account?
No. You can sign PDF files for free without creating an account. The signed PDF downloads directly to your device.
Is my data safe with this tool?
Yes. All processing runs 100% on your device using client-side WebAssembly, Canvas API, and browser APIs. No bytes from your files are transmitted to our servers — zero server upload, absolute privacy.
Why is the processing speed so fast?
Because your file never leaves your browser. SnapKit uses WebAssembly and Canvas to harness your device CPU and GPU directly, skipping slow network upload and download steps.