Browser Extension
Verify any image on the web with a single right-click. The Tectra Chrome extension lets anyone check image authenticity - no account or API key needed.
Installation
Visit the Chrome Web Store (link coming soon).
Click "Add to Chrome" and confirm the permissions.
The Tectra shield icon appears in your extensions toolbar.
The extension requires only the contextMenus and activeTab permissions. It does not read your browsing history or inject scripts into pages.
How to Use
Right-click any image
Right-click on any image on any website and select "Verify with Tectra" from the context menu. The extension fetches the image, sends it to the Tectra verification API, and displays the result in a popup overlay.
Verification flow
1. You right-click an image on any webpage
2. Select "Verify with Tectra" from the context menu
3. Extension downloads the image from its source URL
4. Image is sent to POST https://tectra.vision/api/v1/verify
5. Results appear in a popup overlay on the page:
┌─────────────────────────────────────┐
│ ✓ Authentic (87% confidence) │
│ │
│ Signed by: Reuters Media │
│ Origin: camera_image │
│ Date: 2025-06-14 09:32 UTC │
│ │
│ ✓ Watermark ✓ SHA-256 │
│ ✓ Perceptual ✗ Blockchain │
│ │
│ [View Certificate] [Close] │
└─────────────────────────────────────┘Understanding Results
Authentic
The image was signed with Tectra and passes at least 2 of 4 verification checks. The signer's identity and origin type are displayed.
Unverified
The image could not be verified. It may not have been signed with Tectra, or it may have been significantly modified since signing.
The confidence percentage and individual check results (watermark, SHA-256, perceptual hash, blockchain) are always shown so you can make your own judgment.
Limitations
Only works on images with a direct URL (src attribute). Inline base64 images and CSS background images are not supported.
Images behind authentication or CORS-restricted origins may fail to download.
Very small images (< 64×64 pixels) may not contain enough data for watermark extraction.
The extension verifies the image as served by the website - if the site re-encoded or resized the image, results may differ from the original.
Privacy
What is sent
The image bytes are sent to the Tectra API (POST /api/v1/verify) for verification. No other data from your browser is transmitted.
What is not stored
Verified images are not stored on Tectra servers. They are processed in memory and discarded after the response is returned.
The extension does not collect analytics, track browsing activity, or require an account. It makes a single API call per verification request.
Want to verify programmatically?
Use the TypeScript or Python SDK for automated verification.