Lock and encrypt your private images with a secure PIN. 100% private, browser-based AES encryption for safe photo sharing on WhatsApp. No server uploads.
Lock Image
Unlock & View
Upload Image to Protect
JPG, PNG, WEBP supported
Ready to Encrypt
filename.jpg
* If you forget this password, the image is lost forever.
Upload .sb.lock File
Only files created by this tool
Locked File Loaded
secret.sb.lock
How to use this tool
1
Upload Your Private Media
Start in the "Lock Image" tab. Click the shield icon or drag your JPG, PNG, or WEBP image into the secure zone. You will see a "Ready to Encrypt" preview to confirm you’ve selected the right file.
2
Establish Your Security PIN
Type in a strong PIN or password. This is the "Master Key" for your image. Please choose carefully, as our privacy-first design means we do not store your password and cannot reset it if forgotten.
3
Generate the Locked File
Click "Encrypt & Download." Our engine will scramble the image data locally and produce a file with the .sb.lock extension. This file is now a secure container that cannot be opened by any standard gallery or photo app.
4
Share with Confidence
You can now send this .sb.lock file via WhatsApp, Telegram, or Email. To the rest of the world, it looks like a generic system file. It won't show up in the receiver's "Recent Media" or "WhatsApp Images" folder.
5
Decrypt and View
To see the photo, the receiver (or you) simply goes to the "Unlock & View" tab, uploads the .sb.lock file, and enters the correct PIN. Our secure viewer will then reveal the image in a protected environment that prevents unauthorized saving.
We have all experienced that split-second of anxiety when showing someone a photo on our phone, fearing they might swipe too far and see something private. Whether it’s a personal memory, a sensitive document, an important recording, or any confidential image, our standard phone galleries are surprisingly easy for others to access.
Our Image Locker is a high-security privacy utility designed to give you complete control over your private images. By converting your photos into an encrypted .sb.lock file, the content becomes completely invisible and unviewable to anyone who accesses your phone — including nosy siblings, curious parents, or friends using your device.
This tool goes far beyond simply hiding a file. It gives you true data sovereignty through strong encryption.
The technical core of the SutraBase Image Locker is built on AES-256 (Advanced Encryption Standard). When you set a PIN, our system uses the CryptoJS library to mathematically scramble the raw image data into a secure encrypted format. Without the exact PIN, the resulting .sb.lock file is mathematically impossible to open or view in any standard image viewer or gallery app.
We have also added a Protected Viewer that disables right-click, drag-and-drop, and standard saving options while viewing the decrypted image, providing an extra layer of protection against unauthorized saving or screen capture attempts.
At SutraBase, privacy is our foundation. Unlike most online lockers that require you to upload your images to a cloud server, our tool runs 100% client-side in your browser. Every step of encryption and decryption happens locally in your device’s RAM. Your images never leave your device, never travel over the internet, and never touch our servers. Even we cannot access your content.
This approach combines the power of professional-grade encryption with the simplicity and speed of a modern web app — giving you a true digital safe that stays entirely under your control.
When to use this tool?
The most powerful use case for the SutraBase Image Locker is secure personal sharing.
Many people want to send private photos to trusted friends or family members, but worry that someone else — a parent, sibling, or friend — might accidentally open the file while using their phone. With our Image Locker, you can send the photo as an encrypted .sb.lock file via WhatsApp or any messaging app. The file appears only as a harmless document (e.g., SECURE_123.sb.lock) and cannot be viewed in the chat or in any gallery app. The recipient can only open and view the photo by visiting sutrabase.in and entering the exact PIN you share with them. This gives both sender and receiver full control and peace of mind.
Beyond personal sharing, the Image Locker is highly effective for protecting important documents and sensitive files. You can securely lock digital copies of your Aadhaar card, PAN card, passport, or any other official documents. Even if your phone is lost, stolen, or borrowed, the files remain strongly encrypted and unviewable without the PIN.
It is also ideal for creative professionals. Designers, architects, photographers, and content creators can send first drafts, proprietary designs, or confidential work files as locked .sb.lock files. The recipient can preview the work securely through our protected viewer, but cannot save or misuse the file until the appropriate agreement is in place.
In conclusion, the SutraBase Image Locker helps you reclaim control over your private images in today’s digital world. Our tool uses strong AES-256 encryption and runs 100% client-side in your browser — meaning your photos never leave your device and never touch any server. No sign-ups, no tracking, and no data collection.
Whether you are protecting personal memories, official documents, creative work, or any confidential images, our Image Locker gives you a fast, free, and truly secure way to store and share them. Lock your files and share with confidence — without worrying about unauthorized access.
Frequently Asked Questions
Because we prioritize your absolute privacy, the PIN is not recoverable. We do not store your passwords or your images on our servers. If you lose the PIN, the image data inside the .sb.lock file remains permanently encrypted and cannot be retrieved.
Our "Unlock & View" mode uses a protected viewer that disables the "Right Click -> Save As" and dragging functions. While it is impossible to block every method (like taking a physical photo of the screen with another phone), our tool prevents the standard "One-Click" saving into the gallery, ensuring the photo stays within the secure session.
When you send an image as a "Photo" on WhatsApp, the app automatically creates a thumbnail in the chat and saves it to the "WhatsApp Images" folder in the phone's gallery. By sending the .sb.lock file as a "Document," it stays hidden from the gallery and provides no visual preview to anyone snooping at the chat list.
No. Since the encryption happens locally on your device, the only limit is your browser's available memory. Most modern smartphones and computers can handle high-resolution DSLR photos up to 50MB without any issues.
No. Our AES encryption is a "Lossless" process. We encrypt the exact data bits of your original file. When you enter the correct PIN to decrypt it, the image is restored to its 100% original resolution and clarity.
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