benjamine/jsondiffpatch

Health v2 · maintenance only

Adoption not part of the score

5336 stars · 496 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A TypeScript library for deep diffing and patching JavaScript objects, with smart array diffing via LCS, text diffing for long strings, and delta reversal/unpatching. It supports multiple output formats including a compact JSON delta format, HTML visual diffs, JSON Patch (RFC 6902), and a CLI for comparing files or URLs.

Use cases

• diff two files from the command line
• compare javascript objects and generate a patch
• apply and revert deltas to patch objects
• show a visual html diff of two documents
• generate rfc 6902 patch from two objects
• diff arrays of objects by id instead of position
• compare from a gist or http url

When to choose

• you need deep structural diffing of JavaScript objects or JSON, including smart array matching
• you want to serialize, apply, and reverse deltas for state synchronization or undo/redo
• you need multiple diff output formats (delta, JSON Patch, HTML visual, console) in one small (~16KB) package

When to avoid

• you only need simple string or line-based text diffs without object awareness
• you need diffing of non-JSON binary or arbitrary file formats
• you require a language other than JavaScript/TypeScript

Facets

library · maturity stable

serialization developer-tools cli developer-tools files web-development browser cli cross-platform -diff -patch delta-format array-diffing text-diff visual-diff typescript nodejs

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