Free privacy tools
The Sealby Toolbox
Private tools that run in your browser. Check a photo, create a passphrase, seal a file, and plan recovery. Your data stays on this device unless a tool clearly tells you it needs the network.
Install the toolbox
You’re running the installed app — everything below is precached.
Why these work offline
These tools do their work on your device, not on a server, so they keep working in airplane mode. That matters exactly when you might need them: at a border, mid-flight, or on a connection you don’t trust. One honest note: while you’re online, pages still load this site’s single cookieless visit counter. The seal-a-file page is the exception. It is built so it cannot make any network request at all. The one tool that talks to a server by design is labeled below.
Photos
Locks & phrases
Crypto & wallets
Convert & optimise
Images
PDF toolkit
Your situation
The breach check is the one tool that needs the network, by design: its lookup sends 5 hash characters to Have I Been Pwned. The page itself still loads offline. The lookup waits for a connection.
What installing does (and doesn’t)
Installing saves these pages on your device so they open instantly and work offline. It gets no new permissions, and it cannot see your files or photos until you hand one to a tool. It adds no tracking: the only analytics on this whole site is one cookieless visit counter. It covers the toolbox only, not the rest of the site. Changed your mind? Uninstall it like any app and it is gone completely.
The toolbox is the philosophy. Sealby is the vault.
Every tool here runs on your device, because that is where private things belong. Sealby applies the same rule to your photos and files: encrypted on your phone, and backed up only as encrypted data no one can read.
iPhone & iPad · iOS 17+ · Free