Secret Image Sharing Guide: How to Send Photos Safely with Password Protection

ID photos, scanned contracts, medical records... Sometimes you need to send images that feel too risky for a regular messenger. Once sent, the image gets saved to the recipient's gallery and stays permanently in the chat history.

LOCK.PUB's Secret Image feature protects your photos with a password. Only people who know the password can view the image, and setting an expiration time makes it automatically inaccessible afterward.

How Does It Work?

1. Upload an image -- Supports JPEG, PNG, GIF, and WebP
2. Set a password -- Choose a password to protect the image
3. Generate a link -- A unique link is created
4. Share -- Send the link and password through separate channels
5. View -- The recipient enters the password to see the image

flowchart TD
    A[Upload image] --> B[Set password]
    B --> C[Generate link]
    C --> D[Send link + password separately]
    D --> E[Recipient enters password]
    E --> F[Image displayed]

When to Use It

ID & Certificate Sharing

Real estate deals, banking, government submissions -- there are times when you need to send a photo of your ID. Sending it through a messenger leaves it permanently in the chat history, but with secret images, access is blocked after expiration.

Recommended settings:
- Password: A strong password
- Expiration: 1 hour
- Access limit: 1 view (Pro)
-> Auto-expires after the recipient views it once

Scanned Contracts & Documents

Safely share contract photos, quotes, invoices, and other business document images.

Medical Records

Medical information like diagnosis reports, prescriptions, and test results are especially sensitive. Protect them with a password and set a short expiration time.

Creative Work Previews

Designers and artists can securely share work-in-progress with clients without worrying about leaks.

Private Photos

Share family photos or personal photos that you don't want to post on social media but want to show to specific people.

File Size Limits

Plan	Max File Size
Free	1MB
Pro	10MB

Supported formats: JPEG, PNG, GIF, WebP

Large images are automatically optimized (resized) when saved. They are scaled to a maximum width of 1920px at 80% quality.

Tips for Safe Use

Single-View Access Limit (Pro)

For the most sensitive images, limit access to just one view. After the recipient sees it once, no one can view it again.

Short Expiration Times (Pro)

With the Pro plan, you can set an expiration time. For sensitive images, set the shortest expiration possible.

Image Type	Recommended Expiration
IDs & certificates	1 hour
Business documents	24 hours
General photos	7 days

Send Password Through a Separate Channel

Always send the link and password through different channels:

• Link via messenger / Password via text message
• Link via email / Password via phone call
• Never send link + password in the same message

Comparison with Messenger

	Send via Messenger	LOCK.PUB Secret Image
Auto-saved to gallery	Yes	No
Permanently stored in chat	Yes	No (with expiration)
Password protection	No	Yes
Auto-expiration	No	Yes (Pro)
Access limit	No	Yes (Pro)
Third-party viewing prevention	No	Yes

Get Started

Secret image sharing is free to use (up to 1MB). Try it right now.

Share a Secret Image ->