Dev tools · alternatives · 2026

Package Diff is a development tool that lets users compare two versions of a published NPM package side-by-side. It helps developers understand what has changed between package releases by displaying the differences… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Package Diff: compare two versions of a published NPM package launched in 2019; newer entries below may have overtaken it.

1. 1DI
   Diff.io▲194

   2015 · diff.io · its alternatives →

2. 2
   PDF-Diff - Visualize any differences between two PDFs▲169

   A tool for visualizing differences between two pdf files. - serhack/pdf-diff

   2022 · github.com · its alternatives →

3. 3
   Diff▲90

   Prototype and share changes to your site with no coding

   2019 · getdiff.app · its alternatives →

4. 4AN
   A new way to diff websites▲46

   2015 · diffd.com · its alternatives →

5. 5
   Diffchecker 2.0▲153

   Check the differences between two text files, images or PDFs

   2020 · diffchecker.com · its alternatives →

6. 6DA
   Diffmatic – A daily GitHub digest for dev teams▲67

   2014 · diffmatic.com · its alternatives →

7. 7
   API Diff▲161

   Diff two API versions in seconds and see what has changed

   2022 · api-diff.io · its alternatives →

8. 8
   Diff Text▲216

   Dead simple text comparison

   2024 · difftext.com · its alternatives →

9. 9
   data-diff▲63

   Compare tables of any size across databases

   2022 · github.com · its alternatives →

10. 10
    DiffBoard▲7

    Compare code, JSON & text with visual diffs

    Jun 2026 · chromewebstore.google.com · its alternatives →

11. 11
    GitHub Diff▲6

    Compare changes across GitHub branches, commits, or tags

    2021 · git-diff.netlify.app · its alternatives →

12. 12
    What The Diff▲188

    Your AI-powered code review assistant

    2022 · whatthediff.ai · its alternatives →

13. 13DD
    Data Diff – compare tables of any size across databases▲127

    Gleb, Alex, Erez and Simon here – we are building an open-source tool for comparing data within and across databases at any scale. The repo is at https://github.com/datafold/data-diff, and our home page is https://datafold.com/. As a company, Datafold builds tools for data engineers to automate the most tedious and error-prone tasks falling through the cracks of the modern data stack, such as data testing and lineage. We launched two years ago with a tool for regression-testing changes to ETL code…

    2022 · its alternatives →

14. 14
    Diffchecker▲147

    Compare text differences between two text files

    2015 · diffchecker.com · its alternatives →

15. 15VD
    Visual diff for 3D printable models▲127

    2012 · cubehero.com · its alternatives →

16. 16
    Deff – Side-by-side Git diff review in your terminal▲120

    deff is an interactive Rust TUI for reviewing git diffs side-by-side with syntax highlighting and added/deleted line tinting. It supports keyboard/mouse navigation, vim-style motions, in-diff search (/, n, N), per-file reviewed toggles, and both upstream-based and explicit --base/--head comparisons. It can also include uncommitted + untracked files (--include-uncommitted) so you can review your working tree before committing. Would love to get some feedback

    Feb 2026 · github.com · its alternatives →

17. 17
    Diff Guru▲7

    Compare and merge with precision

    2025 · diffguru.com · its alternatives →

18. 18DA
    Duo – a next-generation package manager for the front end▲168

    2014 · duojs.org · its alternatives →

19. 19SW
    See what other NPM packages everyone else is using▲67

    2016 · npmdiscover.com · its alternatives →

20. 20
    GitHub style split diffs in your terminal▲178

    Syntax highlighted side-by-side diffs in your terminal - banga/git-split-diffs

    2021 · github.com · its alternatives →

21. 21
    JSON Diff – Online JSON Diff Finder▲10

    JSON Diff is a free and open-source tool to compare two JSON objects and find differences. Visualize changes in JSON files, easy and fast.

    2015 · json-diff.com · its alternatives →

22. 22
    View and diff files in ZFS snapshots▲50

    helps you with your zfs snapshots. Contribute to j-keck/zfs-snap-diff development by creating an account on GitHub.

    2014 · github.com · its alternatives →

23. 23ZI
    ZPDer – informs you when an NPM package you use is upgraded▲27

    2016 · zpder.herokuapp.com · its alternatives →

24. 24
    RealDiff – runtime behavior diffing for pull requests (six languages)▲40

    Runtime behavior diffs for pull requests. Contribute to issacnitin/RealDiff development by creating an account on GitHub.

    Aug 2026 · github.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →