Action
Try the local-first experience. Go to the Metadata Remover.
How Local Processing Works
ConvertUnlimited is built on the principle of 'Local-First' software. This means that every image you convert and every PDF you merge is processed entirely within your web browser, using your own device's hardware.
What is Local Processing?
Most 'Online Converters' are actually upload services. When you use them, your files are sent over the internet to a remote server, processed there, and then sent back to you. Local processing eliminates this round-trip. Your files stay in the browser's memory and are handled by client-side scripts.
The Browser APIs Behind the Scenes
We leverage modern web standards to provide desktop-class utility performance in a website: - **HTML5 Canvas API:** We redraw and re-encode images locally to change their formats. - **File & Blob APIs:** We handle your files as local data streams without triggering a network request. - **WebAssembly (WASM):** For heavy tasks like AVIF encoding or PDF manipulation, we run high-performance compiled code directly in your browser tab.
Comparison: Local vs. Upload
| Feature | Upload-Based Sites | ConvertUnlimited |
|---|---|---|
| Privacy | High Risk (Files stored on server) | 100% Private (No upload) |
| Security | Server breach risk | Zero-Knowledge model |
| Wait Time | Upload + Download time | Instant local processing |
| Data Usage | Double (Upload + Download) | Near Zero (Page load only) |
| Internet | Required for processing | Not required after load |
Technical Advantages
Because there is no upload step, the speed of ConvertUnlimited is only limited by your computer's CPU and RAM. This is why we can support bulk processing of hundreds of files without a subscription fee—we don't have to pay for massive server bandwidth, and neither do you.
FAQ
Can you see my files?
No. Our server never receives your file data. The connection is only used to send you the static HTML/JS code.
Is it safe for work documents?
Yes. Since the processing is local, it is often safer than using cloud-based office suites for sensitive document merging or metadata stripping.