Sideglass, by Moises Valero, is a Windows utility that provides a persistent floating window for on-screen references. It can load web pages or local files and keep them visible while you work, offering adjustable visibility and simple placement controls. The app emphasizes a minimalist interface with quick toggles for visibility, aimed at developers, students, and professionals who need constant visual reference without a full browser tab open.

What the app places on your desktop and how it accepts input

Sideglass embeds a floating window that accepts both remote and local sources: web URLs plus local HTML, PDF and image files. The app renders media and pages inside that overlay so you can monitor tutorials, documentation or a video while using other programs. Supported local formats listed by the developer include

• HTML
• PDF
• images

How it behaves in a typical workflow and system load

The app is designed for prolonged background display with a notably smaller resource profile compared with keeping a full browser tab open. That lower footprint makes Sideglass suitable for running alongside demanding tools during coding or document editing. Users report stable operation during extended use, so it functions as a persistent visual reference without forcing you to switch windows frequently.

How it avoids getting in the way of active work

Click-through mode and adjustable opacity are the app's non-intrusive controls; click-through can be toggled from the settings or context menu so mouse events pass to underlying applications while the overlay remains visible. An internet connection is required only for loading web content, otherwise local files display offline. User feedback highlights the tool's stability when used in these modes.

Who can operate it and what level of setup is required

The interface is deliberately minimal, aimed at quick setup; basic tasks such as resizing, positioning and adjusting transparency work from the main window or context menu, so non-technical users can get a reference overlay running quickly. Advanced placement or multi-overlay arrangements need manual adjustment, which makes the app practical for users who prefer simple, visual aids rather than scripted automation.

Suitable choice for anyone needing a low-footprint visual overlay

Sideglass fits developers, students and professionals who require constant on-screen references during focused work, and community feedback emphasizes its steady behavior in daily sessions. Practical tip: test overlays with a local document first to confirm size and position in your usual workspace before switching to live web content. Recommended.