Zero-Server Processing
Privacy by design, not just by promise. Your data stays in your RAM.
Local Entry
Files are accessed via Blob/File API. No packets leave your NIC.
Sandbox Allocation
Dedicated memory buffer (ArrayBuffer) is allocated in a local sandbox.
WASM Initialization
C++/Rust binaries are compiled to WebAssembly for native performance.
Binary Execution
Algorithms process data directly in a non-blocking Web Worker thread.
In-Memory Output
Resulting files are generated as temporary virtual URLs (Blob URLs).
Garbage Collection
Memory is wiped immediately after the session or browser close.
/ Logic Comparison
Architecture Comparison
| Feature | Legacy Cloud Tools | JustLocalTools |
|---|---|---|
| Data Transfer | Upload/Download required | 0KB Transferred |
| Privacy | Subject to server logs | Physically impossible to leak |
| Speed | Limited by ISP bandwidth | Limited by Device CPU/RAM |
| Security | Third-party dependency | Total Ownership |
The Technical Deep Dive
Unlike traditional 'Cloud' tools that act as a middleman for your files, JustLocalTools operates as a Static Binaries Provider. When you visit our site, your browser downloads the 'engine' (JavaScript & WebAssembly) once. From that point on, the tool functions like a desktop application inside your browser tab.
We utilize High-Resolution Timers and SIMD (Single Instruction, Multiple Data) instructions through WebAssembly to ensure that heavy tasks—like merging 500MB PDFs or batch processing thousands of images—don't freeze your interface. All processing happens in an isolated Web Worker, keeping the main UI thread buttery smooth.
"Data is a liability. By never touching your files, we eliminate the risk of data breaches at the source. Professional grade tools, zero server footprint."