DocSigner: sign PDFs in your browser
I needed to sign a multi-page PDF and didn't want another DocuSign-style account, email flow, or "upload your document to our cloud." So I built a tiny free tool instead.
DocSigner
DocSigner runs entirely in the browser:
- Drop in a PDF
- Draw your signature (and initials if you need them)
- Click to place them on any page, optionally on all pages at once
- Download the signed file
Nothing is uploaded. The PDF never leaves your device. No account, no watermark.
It's useful for the boring everyday stuff: contracts, NDAs, invoices, forms. Whenever you just need a mark on the page and not a full e-sign product.
How it's built
React + Vite, with pdf.js for rendering and pdf-lib for stamping the signature into the file. Hosted on Cloudflare Pages. Source is on GitHub if you're curious.
While I normally review AI-generated code, in all honesty this was entirely vibe-coded with Grok 4.5. Just a couple of prompts.
Try it
If it saves you a few minutes, a follow on X is always appreciated.