🔒 Verify it yourself: after this page loads, turn off your Wi-Fi and sign anyway — your files are never sent over the network. When exactly can I disconnect?

Choose files

or drop them here

Sign any file — PDF, Word, Excel, image, code, archive, or many at once PDFs let you place a visible signature on the page. Everything else is signed cryptographically without modification. Every signing produces a tamper-evident audit log.

Sign as

Adds an extra trust signal to the audit log. Not required.

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Verify a signed file →

Why this is different

Four things every other eSign tool gets wrong. We don't.

Your files never leave your browser

DocuSign, HelloSign, Adobe Sign, every online signing tool uploads your files to a server. That's the opposite of confidentiality. We run entirely in your browser. Turn off Wi-Fi and watch it still work.

A real signature, not just a stamp

Drawing a signature image and pasting it onto a PDF (the Mac Preview approach) isn't tamper-evident — anyone can delete or move it without trace. We embed a PKCS#7 cryptographic signature plus a hash-chained audit log. Your counterparty can verify the file wasn't touched after you signed.

Free and unlimited

DocuSign is $25/mo per seat. HelloSign is $20/mo. Adobe Sign is $14–$22/mo. All charge per envelope above a low cap. We're free — no account, no install, no per-document fee. The cost of signing shouldn't be a subscription.

HIPAA-friendly by design

Because files never touch our servers, there's nothing for us to leak, subpoena, or lose. Compliance teams reject SaaS vendors over data-residency questions every day. With us, the question doesn't exist.

How we compare

	Ours	DocuSign	Adobe Sign	HelloSign	Online tools	Mac Preview
Files stay on your device	✓ Verifiable	Uploads	Uploads	Uploads	Uploads	✓ Local only
Cryptographic signature (PKCS#7)	✓	✓	✓	✓	Varies	Image overlay
Tamper-evident audit log	✓	✓	✓	✓	Limited	None
Free for single-signer	Unlimited	3 docs/mo limit	$14–$22/mo	3 docs/mo limit	Often watermarked	✓
No account / no install	✓	Account required	Adobe ID	Account required	Account required	✓ Mac only
Works on Windows, Mac, Linux	✓	✓	✓	✓	✓	Mac only
Works offline after load	✓	No	No	No	No	✓

Turn off your Wi-Fi. It still works.

That's how you know your files never leave your device. (The optional email-verify step sends only your email address — never the file itself. Details below.)

DocuSign, HelloSign, Adobe Sign, every online "free" signer — they all upload your files to a server. We don't. Run the test yourself.

When exactly can I disconnect?

The file content never touches the network — at any point. The only network calls this page ever makes are:

Initial page load — to download the page + crypto libraries. After that, everything is cached for offline use.
Email verification (optional) — only if you click "Verify email," the page sends your email address to our server so we can mail you a confirmation link. The server never sees your file.

Strict-paranoid mode: turn off Wi-Fi before you open the file. Skip email verification (use self-attested). Your file never even has the opportunity to touch a network.

Verified-email mode: stay online through the email-verify step (server sees your email only), then disconnect. Your file is signed locally.

Create your signature