Dev tools · alternatives · 2026

24 alternatives to DiffNow

Compare two files with syntax highlighting and formatting

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. DiffNow launched in 2017; newer entries below may have overtaken it.

1. 1
   Diffchecker▲147

   Compare text differences between two text files

   2015 · its alternatives →

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

   2022 · github.com · its alternatives →

3. 3AS
   A syntax highlighter for Git and diff output, written in Rust▲261

   2020 · github.com · its alternatives →

4. 4
   Diffchecker 2.0▲153

   Check the differences between two text files, images or PDFs

   2020 · its alternatives →

5. 5
   Diff Text▲216

   Dead simple text comparison

   2024 · difftext.com · its alternatives →

6. 6SH
   Syntax Highlight for your github diffs▲18

   2012 · github.com · its alternatives →

7. 7
   Visual Diff Merge▲6

   ​Visual code diff & merge with syntax highlighting

   2025 · visual-diff-merge.miglisoft.com · its alternatives →

8. 8
   BlitzCompare▲70

   Next generation diff for formatted documents

   2021 · its alternatives →

9. 9
   Text and Code File Comparison Tool▲7

   Compare and edit two text-based files or code side by side

   Nov 2025 · nonconfirmed.com · its alternatives →

10. 10
    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 →

11. 11
    DiffScanner▲1

    Compare text and highlight the differences between two text

    2024 · its alternatives →

12. 12PD
    Package Diff: compare two versions of a published NPM package▲29

    2019 · diff.intrinsic.com · its alternatives →

13. 13
    Diff Guru▲7

    Compare and merge with precision

    Oct 2025 · diffguru.com · its alternatives →

14. 14
    DiffBoard▲7

    Compare code, JSON & text with visual diffs

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

15. 15
    API Diff▲161

    Diff two API versions in seconds and see what has changed

    2022 · its alternatives →

16. 16
    Kaleidoscope 5.0▲143

    The leading diff and merge app for Mac developers

    2024 · kaleidoscope.app · its alternatives →

17. 17
    Diffract▲5

    The modern diff tool you always wanted.

    Jun 2026 · getdiffract.com · its alternatives →

18. 18
    DiffFinder: Compare Files (Android)▲5

    Highlights the differences between two versions of a file.

    2020 · its alternatives →

19. 19
    Diff Checker▲5

    Chrome web store

    2024 · chromewebstore.google.com · its alternatives →

20. 20
    Code Hike – More than syntax highlighting▲118

    Use Markdown and React to build rich content websites. Documentation, tutorials, blogs, videos, interactive walkthroughs, and more.

    2021 · codehike.org · its alternatives →

21. 21WP
    Weekend project - VS2010 CoffeeScript syntax highlighting▲39

    2011 · github.com · its alternatives →

22. 22
    Diffd▲93

    Compare website versions before you deploy.

    2015 · its alternatives →

23. 23
    Diff Checker▲14

    Instant AI diff for text, code & JSON right in Chrome

    2025 · trust-fish.com · its alternatives →

24. 24
    Text Diff View▲4

    Simple offline text diff tool for quick comparison

    2024 · 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 →