Keystroke Sigil
Type a phrase twice and your dwell-and-flight micro-timing is forged into a deterministic geometric crest — your typing fingerprint, with a score that proves it’s really you.
Keep it short and memorable — you'll type it twice. /60
Your sigil awaits
Type the phrase twice above. Your unique typing rhythm — how long you hold each key and the pauses between — is hashed into a one-of-a-kind heraldic crest. No two rhythms forge the same mark.
First sigil forged. ✨
Type the phrase a second time to measure how repeatable your rhythm is — and prove it's really you.
🔒 100% private — your keystrokes never leave this page. The crest is generated deterministically from your typing rhythm (key dwell + flight times) via SHA-256. For fun and art, not real biometric authentication.
Why you’ll love Keystroke Sigil
Instant & free
No signup, no paywall, no limits — Keystroke Sigil works the moment the page loads.
Completely private
Everything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any device
Fully responsive and touch-friendly — use it on your phone, tablet or desktop.
Endlessly playable
Designed to make you lose track of time — and come back for more.
How to use it
Open it
No download and no login — the tool is ready right at the top of this page.
Use it
Enter your details or start interacting. Everything updates live as you go.
Get your result
Copy, download or share your result in a single tap. That’s it.
Frequently asked questions
Keystroke Sigil is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
Never. Just open it and play — no signup, no installs, nothing to lose.
Completely. Keystroke Sigil runs entirely in your browser (client-side). Nothing you type, upload or generate is sent to our servers, so your data never leaves your device.
No. It works instantly in any modern web browser — Chrome, Safari, Edge or Firefox — on desktop and mobile.
Yes. The tool is fully responsive and touch-friendly, so it works great on phones and tablets as well as computers.
Global Maple System — a software & AI studio. We built Keystroke Sigil (and 200+ other free tools) to show what we can do. Need something custom built? We’d love to help.
More Toys
From our collection of 317 free tools.
We built this. We can build yours.
Keystroke Sigil is one of 200+ free tools from Global Maple System — a software & AI studio. Need a website, app, AI agent or automation? Let’s talk.