NewPerformance
WASM speed engine
Heavy lifts run on compiled Rust inside WebAssembly. Pages render in parallel and stream to the output as they finish, so a 400-page merge or compression job feels immediate instead of queued.

Highlights
- Multi-threaded page rendering
- Incremental output — preview before the job ends
- No queues, no per-file limits, no rate limiting
How it works
- 1
Load once
The engine caches after first visit and then works offline.
- 2
Process in parallel
Pages are split across workers instead of running one by one.
- 3
Stream results
Finished pages appear immediately in the preview pane.
- 4
Export
Download the assembled file with no server round trip.
Tools included
- Compress
- Shrink scans with visually lossless presets.
- Convert
- Office, image and PDF conversions at native speed.
- Split
- Slice by page, range, bookmark or size.
- Preview
- Instant render of any page while work continues.