Local-first document signing
Sign PDFs on your
own machine.
Inksign seals documents with standards-based PAdES signatures, and your private keys never leave your computer. No cloud, no account, no upload.
Free · runs on any Linux · no account, no upload
Open your document
A PDF — or a Word or Markdown file, which Inksign converts automatically. Everything happens on your machine; the document never touches a server.
Place your signature
Draw or type your mark, drop it where it belongs, and choose ink or a cryptographic seal.
Seal & verify
A tamper-evident PAdES signature anyone can verify, including right here on the web.
Prepare the document, then sign it
Assemble what you need to sign without leaving Inksign — and without uploading anything. Each tool makes a new, unsigned PDF that opens straight into signing.
Combine PDFs
Merge several PDFs into one, in the order you choose.
Split a PDF
Pull out the pages you need, or burst a document into one file per page.
Markdown & Word → PDF
Turn a Markdown note or a Word .docx into a clean, signable PDF — or just open one directly and Inksign converts it for you.
Why Inksign is different
Your keys never leave the machine
Signing happens locally. No RPC, upload, or telemetry ever moves your private key; it can live in software, a TPM, or a hardware token.
Standards-based, not proprietary
Signatures are PAdES (ISO / EU-blessed), the same profile trusted across the industry, verifiable in Acrobat and any compliant reader.
Honest about what it does
Ink marks say they stay editable. Cryptographic seals say they don't. Inksign never claims a legal tier it can't back.
Verify anywhere
Every signature carries an anchor so a recipient can check what it claims, no Inksign install required.
Get Inksign
Inksign runs on Linux. Download one file and either double-click to install, or just run it — no account, nothing to configure. Your keys never leave your machine.
Download, make it executable, and open. No install.
Coming soonEvery build is hosted on GitHub Releases. Received a signed document? You can verify it in your browser.
From the blog
All postsAug 2, 2026
Owning your tools again: offline software and digital self-sufficiency
The future being sold to us is one where you own nothing and rent everything from a server. There's a quieter future taking shape too, built on tools that run on hardware you control, and Inksign is one of them.
Aug 1, 2026
Why your signing key should never leave your machine
Most e-signature tools upload your document and hold your key on their servers. Inksign takes the opposite stance, and it changes what a signature can mean.
Jul 28, 2026
What is PAdES, and why does Inksign use it?
PAdES is the PDF signature profile trusted across the EU and beyond. Here's what it is, why it matters, and how Inksign's verification anchor fits in.