About Compress Images Online Privately
Optimize image file sizes for web speed, email delivery, and storage optimization. PDFDock re-encodes JPG, PNG, and WebP images via HTML5 Canvas and browser WebWorkers. Adjust compression quality sliders to cut image weight by up to 80% while retaining crisp visual fidelity.
How to Compress Images Online Privately
- Select your image file (JPEG, PNG, WebP).
- Drag the Quality slider to set desired compression intensity.
- Click 'Process Files' to compress canvas buffer data.
- Download your optimized image file.
Frequently Asked Questions
Q.How does PDFDock compress images without server processing?▼
PDFDock leverages browser Canvas APIs and native image encoding specs to re-sample image quantization matrices locally in your web browser.
Q.What formats can I compress?▼
PDFDock supports JPEG/JPG, PNG, and WebP images.
PDFDock vs TinyPNG & Cloud Compressors
Compress images locally without daily file limits or cloud uploads.
| Feature | PDFDock | Others |
|---|---|---|
| File Upload Required | No — browser client | Yes — server uploads |
| Quality Controls | Full 10-100% slider | Fixed preset |
| Usage Caps | Unlimited free compressions | Limited per day |
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Your Privacy is Guaranteed
Browser image compression scales canvas metrics inside a client-side WebWorker.PDFDock operates 100% offline after the initial page load. We have no backend servers, no database, and no file storage. Your documents are processed entirely in your browser's memory and are never transmitted over the network. This makes PDFDock inherently compliant with GDPR, CCPA, HIPAA, and other global privacy regulations.