sImage

A static image studio focused on privacy. Every operation runs in the browser, with no uploads, accounts, cookies, or analytics.

Features

• metadata removal by re-encoding image pixels;
• local detection of known EXIF/GPS, XMP, IPTC, comment, PNG, and WebP metadata blocks;
• pixelation, blur, and solid covers for selected areas;
• resizing with optional aspect ratio preservation;
• JPEG and WebP compression;
• conversion between JPEG, PNG, and WebP;
• anonymous filenames generated with crypto.getRandomValues;
• output verification before download;
• offline app shell caching with a Service Worker;
• responsive and accessible interface.

Run locally

Use a simple HTTP server because Service Workers do not run on file:// URLs:

python3 -m http.server 8080

Open http://localhost:8080.

Publish to GitHub Pages

This project includes .github/workflows/deploy-pages.yml.

1. Create a public GitHub repository named sImage.
2. Push these files to the main branch.
3. Open Settings > Pages in GitHub.
4. Under Build and deployment, select GitHub Actions.
5. The workflow will publish the site automatically after every push to main.

With GitHub CLI:

git init
git add .
git commit -m "feat: create sImage"
git branch -M main
gh repo create sImage --public --source=. --remote=origin --push

If GitHub does not enable Pages automatically, select GitHub Actions in the repository Pages settings.

Privacy and limitations

The browser decodes the source file and exports a fresh image through the Canvas API. This process discards metadata blocks supported by the output format. sImage also scans the generated copy before starting the download.

• Animated GIFs are exported as a static image.
• Color profiles may change slightly during re-encoding.
• Very large images depend on browser memory and Canvas limits.
• The tool does not detect faces or text automatically. The user manually selects areas to hide.

Project structure

index.html                 interface and content
styles.css                 visual design and responsive layout
app.js                     local image processing
sw.js                      offline app shell cache
manifest.webmanifest       installable app metadata
favicon.svg                vector icon
.github/workflows/         GitHub Pages deployment

License

Licensed under the MIT License. See LICENSE.