Privacy Policy

TxBooks Tools is a collection of free, no-signup Bitcoin developer utilities attools.txbooks.app. Most tools run entirely in your browser. The two that touch our server (/xpub-explorer and/lightning-address-validator) only forward already-public data to public Bitcoin APIs. We don't have accounts, don't store your inputs, and don't sell data. We don't use cookies, ad trackers, or third-party analytics at the time of this writing.

On-page request logs. Our hosting provider (Render) keeps standard HTTP request logs: IP address, timestamp, URL path, user-agent, response status. These are used for rate limiting, abuse prevention, and diagnostics. We do not attempt to identify you from these logs.

Nothing else.We don't collect email addresses, names, or payment information. There are no user accounts. There is no cookie-based session.

Your xpub never leaves your browser. The xpub Explorer derives all addresses locally using open-source JavaScript (@scure/bip32 + bitcoinjs-lib). Only the resulting addresses (which are already public on-chain) are sent to our server for balance lookup.

Tool inputs are not stored. Anything you paste into BOLT11 / BOLT12 / PSBT / Script / descriptor / codec tools stays in your browser. These tools make no network calls.

When you use certain tools, your browser or our server forwards data to public Bitcoin APIs. These third parties have their own privacy policies:

• mempool.space — fee rate lookups, BTC/USD price, address balance lookups (as a fallback). Queries come from our server, not your browser.
• Blockstream.info — backup for address balance lookups if mempool.space is unavailable. Queries come from our server.
• Lightning Address servers — when you paste a name@domain into the Lightning Address Validator, our server fetcheshttps://<domain>/.well-known/lnurlp/<name>and returns the response to your browser.
• Render (hosting) — serves the site and keeps standard HTTP logs.

Our proxy routes are rate-limited per IP address using an in-memory counter. The counter stores your (hashed-equivalent) IP + a request count for a short window (≤10 minutes), then discards it. This is the only short-lived user-specific data we hold, and it never leaves the server.

The site footer lists hardware-wallet vendors we recommend. At the time of this writing none of these links are paid affiliates, so they carry a plainnofollowrelationship. When real affiliate relationships exist, the links will also be markedsponsoredand disclosed here explicitly.

Because we don't collect personal data, there's typically nothing to access, correct, or delete. If you believe we hold data about you for any reason (for example, IP addresses in logs for a specific window), emailsupport@txbooks.appand we'll respond within 30 days.

The site is not directed at children under 13, and we do not knowingly collect data from them.

If we change this policy we'll update the date at the top. Material changes (for example, adding an analytics provider or user accounts) will be announced via the hub's homepage.

Questions: email support@txbooks.app.