Import an image, pick a preset, press Process. The interface, runtime, and two release models are bundled together, so processing works locally without a model download.

Drag files onto the window, use Open Images, choose a folder where your browser supports it, or paste with Ctrl/Cmd+V. Accepted formats are probed at runtime and listed on the import panel — the app does not claim HEIC, TIFF, RAW or PSD support it does not have.

Presets set a whole group of values at once. Adjusting any of them by hand switches the label to Custom; the underlying values are untouched.

Scale multiplies both dimensions. A 2× pass on a 1000×800 image produces 2000×1600 — four times the pixels. Models are trained at a fixed scale; other factors are reached by chaining passes or by a final resize, and the app tells you which happened.

Resize interpolates between pixels you already have. AI upscaling estimates what might have been there. Resize Only is honest and fast; AI is slower and invents.

Add images to the queue, set per-image overrides where you need them, then Process All. A failed job never removes itself and never stops the queue.

Export writes files through your browser. With File System Access you can pick a folder once and write straight into it. Everywhere else, files download individually or as a ZIP.

Two compact neural models are bundled with the app. Imported HPSR and ONNX files are stored for inspection only. Imported models are validated structurally and stay disabled until you enable them.

Once the service worker has cached the application package, the interface, runtime, and bundled models work with no network. The Home page reports offline readiness only after the service worker controls the page.

WebGPU is much faster than WebAssembly. Large images are processed in tiles; smaller tiles use less memory and take longer. If you hit an out-of-memory error, drop the tile size before anything else.

WebGPU needs a secure context — HTTPS or localhost. File System Access is Chromium-only. Everything degrades to a working fallback; see Diagnostics for what this browser actually supports.

Start at Diagnostics. Run Quick Test, check the backend, then try Retry with WASM or a smaller tile size. Restart Worker clears a wedged pipeline without losing your project.

No image, filename, thumbnail, setting or diagnostic ever leaves this device. There is no analytics code in this application — not disabled, not optional, absent.