I asked Gemini to compare the protections on the two sites. This is what it said. Users here with more experience than me will know if this is accurate or not (AI can make mistakes) but it seems Flickr's API weakens it
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Neither site is truly "secure" in the technical sense.
Glass.photo is practically "more secure," but only because it creates slightly more friction for the casual user.
It is important to understand the golden rule of the internet:
If you can see it on your screen, you can download it. Browsers must download an image to display it; "protection" just means hiding that downloaded file from the user's easy reach.
Here is the breakdown of why Glass.photo edges out Flickr in this specific context, despite both having workarounds.
1. The Protection Mechanisms
| Feature | Flickr | Glass.photo |
| Right-Click | Disabled (via "Spaceball" trick*) | Disabled (via JavaScript) |
| Direct Access | Offers a "View All Sizes" page which often exposes higher resolutions. | No native "View Original" or size selection menu for viewers. |
| API Access | Has a public, well-documented API that scrapers have used for decades. | No public API; harder for bots to mass-scrape. |
| Obfuscation | Uses a transparent 1x1 pixel image overlay (the "Spaceball") to intercept clicks. | Relies on a modern Single Page Application (SPA) structure that makes "Save As" harder. |
The "Spaceball" Trick: Flickr often places a transparent image
on top of the real photo. When you right-click to "Save Image," you end up saving a blank spaceball.gif instead of the photo.
2. The Workarounds (How Thieves Steal)
I HAVE REMOVED THIS SECTION FROM GEMINI's ANSWER AS IT TELLS PEOPLE EXACTLY HOW TO DOWNLOAD ON EITHER SITE. BUT BASICALLY, IT's EASIER ON FLICKR
3. Why Glass is 'More' Secure
Glass wins on
Security by Obscurity and
User Interface Design.
- No Legacy Baggage: Flickr is 20 years old. It has legacy code, predictable URL structures, and millions of old links that are easy to scrape. Glass is newer and uses modern web frameworks that are slightly more annoying to pick apart.
- The "Walled Garden": Glass is a paid, subscription-only community (for uploaders).1 There is less incentive for mass-scrapers/bots to target it compared to Flickr, which hosts billions of public, Creative Commons images.
- Lack of "All Sizes": Glass forces the viewer to see the image at the resolution the browser dictates. It doesn't offer a handy menu to "See the 6000x4000 original," which is the most common way Flickr users accidentally leak their high-res files.
4. Verdict
Glass.photo is "more secure" because it lacks the easy backdoors (like "View All Sizes") that Flickr provides. However, for a dedicated thief, the difference is negligible.
Recommendation:
If you are truly worried about theft, never upload high-resolution files.
- Resize your images to 2000px on the long edge before uploading.
- This ensures that even if someone steals it (via screenshot or Inspect Element), they only get a web-quality version, not a print-quality master file.