ShiftGain

ShiftGain is a privacy-first file processing suite: compress, convert, and optimize images and PDFs entirely in the browser — your files never leave the device.

Highlights

• Smart compression — Smaller files with strong visual fidelity
• Format conversion — 20+ formats (PNG, JPEG, WebP, PDF, and more)
• Batch workflows — Queue many files at once
• Local-only — No cloud uploads, no data collection; optional metadata stripping; works offline after load

Stack — Next.js 15 (App Router, Turbopack), React 19, Tailwind CSS v4, Radix UI, Lucide, Zustand; pdf-lib for PDF work; Web Workers and WebAssembly for near-native throughput.

Architecture (summary) — A serverless client-side model: the UI and Zustand state feed a worker pool that runs WASM-backed and Canvas/pdf-lib pipelines, then hands results back for download — all inside the browser tab.

Privacy — Non-custodial by design: processing stays on-device, unlike typical “free converter” sites that upload to remote servers.

License — Proprietary; contact the ShiftGain team for licensing.