For your notes
Notes that stay with the site. Saved as you type.
A side panel beside the page, not over it. Write a note for one page, a whole site or a pattern of pages, and it comes back when you return.
The usual complaints, answered
What people want from a notes extension.
“My notes disappeared.”
Every note saves as you type and keeps its earlier versions. Deleted notes wait 60 days in Recently deleted.
“The popup covers the page, and closes when I click away.”
Noteproof is a side panel: it sits beside the page and stays open. Pop a note out into its own window, and keep it on top.
“I want notes for this site, not every site.”
A note belongs to a page, a whole site or a pattern of pages. The toolbar icon shows a dot where you have notes. Notes with no site are for everything else: they show on pages that aren't websites, like a new tab.
“Let me add what I selected to my note.”
Select text on any page and right-click, or press ⌥⇧A (Alt+Shift+A): it's added to that site's note.
A real editor, in a narrow panel
Everything you need to keep a page's notes in order.
- Headings that fold, checklists, tables, highlights, links and lists.
- ⌘K (Ctrl+K on Windows) for every action.
- The list of this site's notes beside the note, and a search through all of them.
- Make a note read-only, so a stray key can't change it, or lock it with your password.
- Export your notes as Markdown.
And it checks what you paste
Keep the details you send money to in Locked.
Crypto addresses, bank accounts and payment handles: read-only, encrypted, and checked when you paste them on the sites you choose. See how it checks.
Locked: details that can't change by accident
The details you send money to, read-only and copy-only, in one place.
- Crypto addresses with their network and memo or tag: Bitcoin, Ethereum and Ethereum-style networks, Solana, Tron, XRP, Stellar, TON, Cosmos and more.
- Bank accounts: IBANs with their BIC, and US, UK, Canadian and Australian account numbers with their bank's number.
- Exchange user IDs and payment handles (PayPal, Venmo, Cash App, Revolut, Wise, Zelle).
- ID numbers such as an SSN or a passport number, masked until you press Show.
- Encrypted with a password only you know. Locked locks itself after 15 minutes without use.
Try it here
Paste a look-alike and see what happens.
This runs the paste guard's own check, right in this page. The saved items are public test values, and nothing is sent anywhere.
Saved in Locked
Public test values, nobody's. Never send anything to them.
Private by design
Your notes and your money details stay yours.
- Everything stays on your computer.
- No account, no servers, no ads, no analytics. Noteproof makes no network requests.
- Locked is encrypted.
- With a password only you know. Nobody, us included, can reset or recover it.
- It reads a site only when you say so.
- The paste guard works only on the sites you turn it on for, and Chrome asks you too.
- Recovery phrases and private keys are refused.
- In Locked, and when pasted into a note. One typed into a note by hand is flagged until you delete it.
- Readable code.
- Nothing in it is minified. Read the privacy policy.
A check, not a guarantee
A hostile page can still do things a browser extension can't see, and Noteproof can't see wallet popups or apps on your phone. Always confirm changed payment details with the person, on a phone number you already had.
Questions
Good to know.
Is Noteproof free?
Yes. It's free to install and use.
Does Noteproof send my notes or addresses anywhere?
No. It has no account and no servers, and it makes no network requests. Everything stays in Chrome on your computer.
Which sites does the paste guard check?
Only the ones you turn it on for, such as your exchange's withdrawal page or your bank's payment page. Chrome asks you first, one site at a time. Notes work on every site without it.
Which networks and accounts does it know?
Crypto: Bitcoin, Ethereum, BNB Smart Chain, Polygon, Arbitrum One, Base, Optimism, Avalanche C-Chain, Tron, Solana, XRP, Stellar, TON and Cosmos Hub. Banks: IBANs with their BIC, and US, UK, Canadian and Australian account numbers with their bank's number. Also user IDs on Binance, OKX, Bybit, KuCoin, Bitget, Gate, MEXC and Coinbase, and PayPal, Venmo, Cash App, Revolut, Wise and Zelle.
Does it work in wallet popups or phone apps?
No. A browser extension can't see inside another extension's popup, such as a wallet's, or apps on your phone. It checks what you paste on the websites you turn it on for.
What if I forget my Locked password?
Nobody can reset or recover it, us included. Keep it somewhere safe.
Why won't it save my recovery phrase?
A recovery phrase or a private key gives full control of a wallet, and it shouldn't sit in a browser extension. Noteproof refuses them in Locked and when pasted into a note; one typed into a note by hand is flagged until you delete it.
Do my notes sync between computers?
No: everything stays in Chrome on this computer. Locked has Back up and Restore, and ⌘K (Ctrl+K) exports your notes as Markdown.