Your message.
For their eyes.
Nobody else's.

ShareLock locks what you write — text, photos, voice notes — so only the person you pick can open it. Send through WhatsApp, Telegram, SMS, email — whatever you already use.

Get ShareLock — Free for Android

What others see What your friend sees

Drag to reveal

See it in action

ShareLock in 60 seconds.

Live demo · 1:24

How it works

Three taps. No accounts.

ShareLock doesn't replace your messengers — it rides on top of them. Encrypt on your phone, paste anywhere, only your contact can open it.

Write a message or attach media.

Open ShareLock, pick a contact, type or record. Photos, audio, video, files — all stay on your phone until you seal them.

Pick a messaging platform and send.

One tap copies the encrypted text — or a PDF if you attached a file. Paste it into WhatsApp, Telegram, X, Gmail, Snapchat — anywhere you'd normally chat.

ShareLock ciphertext pasted into Telegram

Recipient pastes and instantly reads.

They paste the ciphertext into their ShareLock and the message unfolds — text, image, or file. Anyone else who finds it sees nothing useful.

ShareLock decrypt screen showing plaintext

Why trust this

No account. No phone number. No server.

No one — including us — can read your messages. Nothing to subpoena, nothing to leak, nothing to log. The keys live on your device.

No account

No signup, no email, no password. Open the app and you're already private.

No phone number

Your identity is a key on your device — never a SIM card or recovery contact.

No server

Nothing transits our infrastructure. We have no backend that could fail or leak.

No one can read it

Including us. Encrypted with a key only your contact holds — on their device.

FAQ

Questions you might have

How secure is ShareLock?

ShareLock uses military-grade encryption. Your messages are encrypted on your device using public-key cryptography before they ever leave your phone. We never see your messages, your keys, or your identity. Even if someone intercepts the encrypted text, it's useless without your contact's private key — which never leaves their device.

Can you read my messages?

No. We can't read your messages because we never receive them. ShareLock doesn't have servers that store or relay messages. You copy the encrypted text and send it yourself through whatever channel you choose. We have no access to your content, your contacts, or your keys.

Why isn't ShareLock open source?

Right now, our priority is shipping fast and keeping the app secure. Managing an open-source project properly takes significant time and effort — contribution guidelines, code reviews, release management — and we'd rather put that energy into making ShareLock better for you. We may consider open-sourcing the project in the future.

Why isn't ShareLock on the App Store or Google Play?

We're working on it. App store approval takes time, especially for privacy-focused tools that don't collect user data — which is exactly what the stores expect you to provide. In the meantime, you can download the APK directly and install it on any Android device. An iOS version is planned.

Do I need an account or phone number?

No. ShareLock doesn't ask for your name, email, phone number, or any personal information. You're anonymous from the moment you install it. The only people who know who you are on ShareLock are the contacts you choose to add.

What happens if I lose my phone?

Your encrypted keys are stored only on your device. If your phone is lost, no one can access the app without your PIN. If you've enabled the self-destruct PIN, entering it wipes all data silently. You can set up ShareLock fresh on a new device — your contacts will need to re-add your new key.

What can I encrypt?

Text messages, photos, audio recordings, videos, and files. Media attachments are encrypted and delivered inside an innocent-looking PDF that only your contact can open with ShareLock.

About Us

Built by people who believe in private conversation

ShareLock was built by a small, independent group of developers and privacy advocates who share one conviction: the right to communicate privately is not a privilege — it's a fundamental freedom.

We live in a world where every message, every call, every click is monitored, stored, and analyzed. Governments surveil citizens. Corporations mine conversations for profit. Platforms decide what you can say and to whom. The "nothing to hide" argument has been used to normalize mass surveillance — but privacy isn't about hiding. It's about autonomy.

We built ShareLock because we believe ordinary people deserve the same tools that protect whistleblowers, journalists, and activists. Not because everyone has secrets — but because everyone has the right to choose who hears them.

ShareLock has no servers, no accounts, no tracking. We don't know who you are. We don't know what you send. We don't want to. That's the point.

What we collect: nothing

ShareLock is designed to know as little about you as possible. Here's exactly what we do and don't do:

What we don't collect

No names, emails, or phone numbers
No message content — ever
No encryption keys
No contact lists
No location data
No device fingerprints or advertising IDs
No cookies on this website

Analytics

This website uses a privacy-friendly analytics tool to measure aggregate page views and button clicks (such as APK download presses). The tool does not use cookies, does not collect personal data, does not assign persistent identifiers to visitors, and does not track anyone across other websites. Individual visitors cannot be identified. No data is shared with third parties or used for advertising.

The app

ShareLock does not connect to any server. Your keys, contacts, and messages are stored only on your device. Nothing is transmitted to us — we have no servers to receive it. When you encrypt a message, you copy and send it yourself through any channel you choose.

APK downloads

The APK file may be served from a third-party CDN or hosting provider. Standard server access logs (IP address, timestamp, file requested) may be recorded by the hosting provider. We do not control or access these logs. When you press a download button, we record an anonymous click event (no IP, no identifier) so we can see how many visitors start a download. We cannot measure completed downloads because the APK is served from an external CDN.

Use ShareLock responsibly

ShareLock is a privacy tool built for people who value the freedom to communicate without surveillance. It is not a shield for illegal activity.

You agree not to use ShareLock to:

Store, send, or receive illegal content of any kind
Threaten, harass, or endanger others
Distribute malware or exploit vulnerabilities
Facilitate fraud, trafficking, or any criminal activity
Violate the laws of your jurisdiction

Your responsibility

You are solely responsible for the content you create, encrypt, and share — with or without ShareLock. Encryption protects your privacy. It does not exempt you from the law.

Our position

We built ShareLock for journalists, activists, business professionals, and anyone who believes that private conversation is a right — not a crime. We stand firmly against the misuse of privacy tools. If you're looking for a tool to hide illegal activity, look elsewhere.

Your message.For their eyes.Nobody else's.