DiffPro Web – Instant file diff for non-Git users

An offline file comparison tool for text, folders, images, PDF, and Excel—no Git needed

Problem

Many people need to compare files daily, but Git is too steep for non-programmers or occasional users. Online diff tools often only support text, require uploads, and raise privacy concerns.

Solution

A fully local, offline web app (packable as desktop) that visualizes diffs across text, folders, images, PDF, and Excel. No Git knowledge required, just drag and drop.

Users

Non-developer professionals (legal, finance, operations) who compare documents, occasional non-Git users, and privacy-conscious developers.

MVP

Text diff with highlighting; folder tree diff (added/removed/modified); image side-by-side and overlay; PDF page diff; Excel cell-change highlighting; runs offline, no uploads.

Revenue

Free base + one-time $19 unlock for PDF/Excel diff and batch processing; or pay-per-use API.

Why now

Browser local compute is powerful enough, WASM enables complex format parsing, and privacy concerns make offline tools stand out.