fclones

7.1easy start · #3 of 38
in Duplicate File Finders

Runs on Linux, Mac, Windows.

fclones is ranked #3 of 38 in duplicate file finders on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

fclones plans and pricing

Open-source fclones Free MIT license · command-line utility github.com · 1 Oct 2026

Free plan: Yes
Platform coverage: cross-platform
Scan locations: Directory trees, multiple directory roots, standard-input file lists, and mounted or removable devices
Match methods: File size, inode/file identifiers, prefix hash, suffix hash, and full-content hash
File preview: Yes
Automatic selection: Yes
Folder exclusions: Yes

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Purpose: fclones identifies groups of identical files and removes unwanted copies.
File operations: It can remove, move, or replace redundant files with soft or hard links.
Deduplication: It can deduplicate file data using native copy-on-write reflinks on supported file systems.
Selection: It supports multiple directory roots, standard-input file lists, recursion limits, glob and regular-expression filters, and minimum or maximum file sizes.
Output: It provides standard text, fdupes-compatible, CSV, and JSON output formats.
Integrations: The project says it integrates with Unix utilities such as find and speaks JSON.
Safety controls: Users can inspect and modify duplicate lists before removal, and the --dry-run option reports filesystem changes without executing them.
Performance: The Rust implementation parallelizes I/O and CPU-heavy stages and automatically tunes processing for SSDs and HDDs.
Caching: Optional persistent hash caching can speed up repeated grouping and resume interrupted work.
Security: The repository is released under the MIT license.
Platform limit: Copy-on-write file-data deduplication is not supported on Windows.
Linux optimization: Physical file-access ordering and page-cache drop-behind optimizations are unavailable on platforms other than Linux.
Support: The project provides GitHub Issues and Discussions for community support.
Price from: Free

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