Professional document sealing. Anywhere.
Seal documents with your professional credentials from your iPhone or Mac. Tamper-proof, instantly verifiable, always with you.
Native on iPhone & Mac
Built from the ground up for Apple platforms. Not a web wrapper.
Your credentials, everywhere
Seal, verify, and share from any Apple device.
Seal from your iPhone
Upload, position your stamp, and seal documents right from your pocket. Perfect for job sites and client meetings.
Native macOS app
Full desktop experience with batch sealing, certificate management, and keyboard shortcuts you'd expect from a native app.
Instant verification
Every sealed document gets a unique QR code. Anyone can scan it to verify the seal is authentic and untampered.
How it works
Three steps to a sealed document.
Upload
Drop your PDF into Credo from your iPhone, Mac, or web browser.
Seal
Position your professional stamp, add your credentials, and seal with one tap.
Share
Send the sealed PDF to clients. They can verify it instantly with the QR code.
Ready to try Credo?
Join the alpha and get early access to Credo on iPhone and Mac.