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Markdown Changelog Diff & Upgrade Guide Analyzer

Parse release notes, extract breaking changes, features, and fixes, and compile standardized SemVer migration guides for your users.

From Version (Current)

To Version (Target)

Raw Changelog / Release Notes (.md) Upload CHANGELOG.md

Standardized Migration Guide (.md)v2.4.0 ➔ v3.0.0

# 🚀 Upgrade & Migration Guide: v2.4.0 ➔ v3.0.0

## ⚠️ Breaking Changes (3)

- 💥 **BREAKING**: Removed legacy v1 REST endpoints (/api/v1/render); use /api/v2/parse with typed streaming response.
- 💥 **BREAKING**: Minimum Node.js version bumped from v18 to v20.9.0 LTS.
- 💥 **BREAKING**: Renamed MarkdownConfig.sanitizeHtml to MarkdownConfig.htmlSecurityLevel.

## ✨ New Features & Enhancements (4)

- 🎁 Native Next.js 16 App Router and Turbopack compiler support.
- 🎁 Zero-latency client-side WebAssembly AST tokenizer.
- 🎁 Support for GitHub Flavored Markdown multi-line code review suggestion blocks.
- 🎁 Automatic Schema.org JSON-LD generation for FAQ accordions.

## 🐛 Bug Fixes & Improvements (3)

- 🩹 Fixed cumulative layout shift (CLS) caused by dynamic ad tag insertion.
- 🩹 Resolved memory leak in AST table column transposer on tables larger than 10,000 cells.
- 🩹 Fixed unicode character sanitization for right-to-left (RTL) Arabic and Hebrew texts.

## ⏳ Deprecations & Removals (1)

- ⚠️ MarkdownSyncClient is deprecated; will be removed in v4.0. Use createAsyncParser() instead.

## 📦 Recommended Upgrade Command

```bash
# Upgrade dependency to target release
npm install my-package@3.0.0
```

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Complete Guide & Overview

Markdown Changelog Diff & Upgrade Guide Analyzer

Extract breaking changes, features, and fixes from release notes and automatically compile clean, customer-ready migration guides with SemVer compatibility checks.

How to Use the Markdown Changelog Diff & Upgrade Guide Analyzer

Input Content

Paste or compose your markdown or source data into the input editor.

Customize Settings

Select formatting options, syntax modes, or display options.

Copy or Download

Copy the processed output to your clipboard or download the generated file.

Key Features & Capabilities

Automated Breaking Changes Highlighting: Detects and groups critical breaking updates to prevent downstream production incidents.

SemVer Upgrade Command Generation: Automatically outputs copy-paste package manager commands for smooth upgrades.

Categorized Release Breakdown: Organizes updates into Breaking, Features, Bug Fixes, and Deprecations.

100% Client-Side Parsing: Your internal software release notes and proprietary code comments stay completely private.

Frequently Asked Questions

How does the analyzer detect breaking changes?

The analyzer scans for common heading patterns such as '## Breaking Changes', '### Breaking', and bullet points containing breaking indicators, grouping them at the top of the migration guide with high-visibility warnings.

Can I upload an existing CHANGELOG.md file?

Yes! Use the 'Upload CHANGELOG.md' button to load your markdown file directly from your computer without uploading any text to a server.

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