Inspect files in-browser: magic-number detection + virtual scrolling

Many developers, security analysts, SREs and code reviewers regularly need to inspect opaque files (binaries, archives, images, logs) but lack fast, privacy-preserving in-browser tools that can reliably identify formats and show large contents without uploads or local installs; this friction affects teams inside the 26 million-professional-developer market and contributes to wasted context-switching and slow reviews. Current approaches either force uploads to cloud services, require heavy native tooling, or rely on brittle extension-based heuristics that misidentify files and choke on multi-gigabyte payloads. You could build a web-native file inspector that combines robust magic-number detection with WebAssembly-powered parsers and virtual scrolling UI so large files open instantly and stay client-side; provide an embeddable library, browser extension, and integrations for PRs/CI so the same inspector works in previews and automated pipelines. Position a dual model: an open-source core for broad adoption and paid enterprise integrations and hosted analytics, targeting a $100 average revenue per user segment within the $2.6B tooling market (market score 88/100, revenue potential 72/100). This moment is favorable because WebAssembly makes near-native binary parsing in the browser feasible and privacy-first workflows are increasingly valued, while cloud-native development shifts more activity into web UIs and code review systems. Competition is medium, but differentiation is achievable through a focus on deterministic magic-number identification, memory-efficient virtual scrolling, first-class CI/PR integration, and clear privacy guarantees; the main challenges are maintaining parsers for many formats, handling browser memory limits, and proving enterprise value, so pursue this only if you can commit to engineering breadth and deep integrations.