06 · where bytes actually move
Inside your tab. Outside everyone else’s reach.
The file lands in the browser’s blob store. Workers carry it through the Wasm kernel. Devtools sees the same operations you would. The page never opens a socket to a render server.
- No upload endpointThe kernel never accepts a file over the network — only via the <input> or drag-drop API.
- Cache by sha256Wasm modules are content-addressed; second visit reuses the cached binary offline.
- Open sourceAuditable atgithub.com/optimal-convert/engine.
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No accounts. No rate limits. No watermarks. Every conversion runs in your browser. If you’re a clinic, law firm, or regulated team that needs to audit the pipeline, write to us — we’ll point you at the engine source and the format modules.