Local, single-file diff checker with offline, no-uploads privacy-first UX

Local, single-file diff checker with offline, no-uploads privacy-first UX targets a $600M = 3,000,000 professionals × $200 ACV (developers, writers, legal, and security-conscious pros worldwide willing to pay for privacy tools) total addressable market with medium saturation and a year-over-year growth rate of 6% YoY (developer tools and productivity utilities growth, IDC/Stack Overflow market signals, 2023-2025 estimates).

Key trends driving demand: Privacy-first tooling — As data leakage incidents rise, professionals increasingly prefer tools that guarantee no remote upload, creating demand for client-side utilities.; Client-side web apps and WASM adoption — Modern browsers and WASM make high-performance offline tooling feasible, enabling tiny, distributable single-file apps.; Developer and prosumer tool specialization — Users are willing to pay for niche, high-quality utilities that solve one problem well rather than general-purpose suites.; Shift to packaged apps for regulated environments — Enterprises are asking for signed, auditable, and locally-deployable binaries to meet security policies..