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Best Code Duplication Detection Tools in 2026

Dolos leads this list of 18 (8.7/10, free plan). jscpd is next (8.5/10, free plan), and Avidemux is the next highest-placed option with a free plan (8.3/10). These tools locate repeated or closely matching code, helping you inspect duplication across a codebase. This list is for developers and teams comparing ways to detect clones.

  1. 01 Dolos

    Dolos suits teachers checking programming tests, exams, and exercises where collaboration is permitted within small groups.

    Free plan Open source Web · Windows · macOS · Linux
    8.7 Visit Specs
  2. 02 jscpd

    jscpd suits developers who want to check repositories for duplication locally or in CI.

    Free plan Open source Windows · macOS · Linux · API
    8.5 Visit Specs
  3. 03 Avidemux
    Free plan Open source Web · Windows · macOS · Linux
    8.3 Visit Specs
  4. 04 PMD

    PMD suits developers and teams who want static checks and duplicate-code detection in their build or CI workflows.

    Free plan Windows · macOS · Linux · Self-hosted
    8.1 Visit Specs
  5. 05 Duplo

    Duplo suits developers who want to scan repositories for repeated code or text and use reports in continuous integration.

    Free plan Windows · macOS · Linux
    7.9 Visit Specs
  6. 06 dcd
    Free plan macOS · Linux
    7.8 Visit Specs
  7. 07 NiCad

    NiCad suits developers or teams looking for similar code fragments across repositories and who can work with its supported languages or provide a TXL grammar.

    Free plan Windows · macOS · Linux · Self-hosted
    7.7 Visit Specs
  8. 08 Deckard
    Windows · macOS · Linux · API
    7.5 Visit Specs
  9. 09 phpcpd-next

    It suits PHP teams scanning repositories for copied or reordered code, including CI workflows.

    Free plan Linux · API · Self-hosted
    7.4 Visit Specs
  10. 10 Simian Similarity Analyzer

    Simian suits developers who want to find repeated text or code across repositories and run scans locally, from scripts, or in build pipelines.

    Free plan Windows · macOS · Linux
    7.4 Visit Specs
  11. 11 art-dupl
    7.3 Visit Specs
  12. 12 SourcererCC
    Linux · Self-hosted
    6.6 Visit Specs
  13. 13 CCDetect-lsp
    Windows · macOS · Linux
    6.1 Visit Specs
  14. 14 Fallow
    Web · Windows · macOS · Linux
    5.9 Visit Specs
  15. 15 CCFinderX
    Linux
    5.8 Visit Specs
  16. 16 CloneDR
    Windows
    5.8 Visit Specs
  17. 17 JPlag
    Windows · macOS · Linux
    5.8 Visit Specs
  18. 18 Pattern Insight Clone Detection
    Web
    5.4 Visit Specs
How this list is ordered. Specifiction scores each tool on how fully its maker documents it, whether its prices are published, where the research puts it, the platforms it runs on and whether it can be tried for free (how we rank). Makers can also buy a numbered place (how Specifiction is paid for).

When comparing entries, review their language coverage, required platform, free or paid terms, near-match detection, CI or pull-request reporting, duplication gates, trend views and source availability.

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