Most duplicate tools upload your library or push "similar" matches. DupShelf runs entirely in your browser—photos never leave your device.
Scan a folder (Chrome/Edge) or add batches. Exact duplicates are grouped by file content (SHA-256), so renamed copies and re-exports still match.
Review groups, choose keepers, move extras to a subfolder or export CSV. DupShelf never auto-deletes. Free, no account, no upload—built for messy backups and downloads.
Format, validate, diff, repair, flatten, JSONPath-query JSON. Convert to TypeScript, Go, Python, Prisma, Zod, Mongoose, SQL, YAML, CSV. Decode JWTs. Generate schemas. Built for the actual things you do at work — fast, in your browser, no upload.
60+ image tools that never upload your photos. Compress JPG/PNG to exact KB targets, resize for UPSC/JEE/passport forms, convert HEIC→JPG, WebP↔PNG, AVIF, remove backgrounds, watermark, crop. All processing happens in your tab — privacy by architecture.
