Security Architecture
Every image you process on ImageXpo stays on your device. Always. This page explains exactly how — and how you can verify it yourself.
Zero-Knowledge Design
ImageXpo is built on a simple principle: we cannot access what we never receive. Unlike cloud-based image tools that upload your files to remote servers for processing, ImageXpo performs every operation — compression, conversion, background removal, resizing — entirely within your browser's memory using WebAssembly (WASM).
This means your images, documents, and personal photos are mathematically impossible for us to access, store, or transmit. There is no upload step. There is no server queue. Your file goes from your storage to your browser's RAM and back to your storage — without touching any network infrastructure we own or operate.
How WebAssembly Makes This Possible
WebAssembly is a W3C standard that allows high-performance binary code to execute directly inside your browser — at near-native CPU speeds. When you use an ImageXpo tool, our WASM modules (compiled from optimized C/C++ libraries like libvips, libjpeg-turbo, and libpng) are downloaded to your device once, cached locally, and then execute all processing operations inside your browser's sandboxed memory.
The critical distinction: the WASM module runs on your hardware, using your CPU and RAM. Your image data is loaded into the module's local memory space, processed, and the result is written back — all without any network transmission of your file content.
What Network Traffic You Will See
When you use ImageXpo, your browser does make network requests — but none of them carry your image data:
- Initial page load: HTML, CSS, and JavaScript files are downloaded from our CDN (Cloudflare). These are the same for every user.
- WASM module download: On first use of a tool, the relevant WASM binary is downloaded and cached in your browser. Subsequent uses are fully offline.
- Analytics (optional): We collect anonymous page view counts via privacy-respecting analytics. No image data, no file names, no personal identifiers are included.
Your image file bytes are never part of any network request. You can verify this using your browser's DevTools Network tab — filter by size and you will see no outbound requests containing your file data during processing.
Verify It Yourself — The Offline Test
The strongest proof of local processing is the offline test:
- Open any ImageXpo tool page (e.g., Image Compressor)
- Wait for the page to fully load
- Disconnect your internet connection (turn off Wi-Fi or unplug ethernet)
- Upload an image and process it
- The tool will work perfectly — because no internet connection is needed for processing
Cloud-based tools fail immediately when offline. ImageXpo continues to function, proving that all computation is local.
Security Comparison
| Feature | ImageXpo | Cloud Tools |
|---|---|---|
| Files uploaded to server | ❌ Never | ✅ Always |
| Server breach exposes your files | ❌ Impossible | ✅ Possible |
| Account / signup required | ❌ Never | ✅ Usually |
| Works offline after first load | ✅ Yes | ❌ No |
| GDPR compliant by architecture | ✅ Yes | ⚠️ Depends |
| Processing speed | ✅ Near-native (local CPU) | ⚠️ Network dependent |
| File size limits | ✅ Only your RAM | ⚠️ Server-imposed |
GDPR & Data Residency
Because ImageXpo never receives your image data, we have no personal data to govern under GDPR, CCPA, HIPAA, or any other data protection regulation. There is no data controller relationship for your image files — they never leave your jurisdiction. This makes ImageXpo the natural choice for professionals handling sensitive assets: medical images, legal documents, private photographs, or corporate intellectual property.
Security Headers & Infrastructure
Our delivery infrastructure is secured by Cloudflare, including DDoS protection, WAF (Web Application Firewall), and TLS 1.3 encryption for all asset delivery. Our pages ship with strict Content Security Policy (CSP) headers to prevent cross-site scripting (XSS) attacks. The WASM binaries are served with integrity checks to ensure they have not been tampered with in transit.
Report a Security Issue
If you discover a security vulnerability in our platform, please disclose it responsibly by emailing security@imagexpo.com. We take all reports seriously and aim to respond within 48 hours. We do not currently operate a formal bug bounty programme, but we publicly acknowledge responsible disclosures in our changelog.