Compare Documents Online — Free & Private
Upload any two Word, Markdown, JSON, or text files and instantly see what changed between them. DiffForge extracts clean text content, formats JSON before comparison, and renders a precise, character-level diff. No server, no storage, no account required. Works completely offline in your browser.
Extract & Compare Word Docs
DiffForge reads raw text from .docx files using mammoth.js — entirely in your browser. Then diffs the contents using the same algorithm as Git, giving you a precise patch between any two documents.
Side-by-Side Document Comparison
Switch between side-by-side split view and unified line-by-line view. Side-by-side is ideal for long documents like contracts or reports where you need to see context on both sides simultaneously.
Export with Metrics & Collapse
Download a standalone HTML report with a summary banner (files changed, lines added/removed), collapsible file sections, and all diff styles embedded. Perfect for sending to clients or attaching to audit reports.