dupeGuru

dupeGuru is a free desktop tool for finding duplicate files, best suited to people who want several matching methods without paying for a cleanup app. Its exact-content scans are a strong fit for dependable duplicate checks; similarity scans are broader, but require more careful review.

Overview

Scans run against folders and are organized into Standard, Music, and Picture modes, each with specialized scan types and preferences. You can filter and sort results, inspect a file beside its reference in a details panel, and then delete, move, or copy marked files. Automatic selection can speed up choosing candidates, but it does not remove the need to check what a similarity scan has matched.

The reference-folder and duplicate-group safeguards are designed to protect reference files and retain at least one file in each duplicate group. They reduce the risk of a mistaken cleanup, but the help still recommends reviewing results before deletion.

Key features

• Standard scans: Filename matching can find similar names, while content scans treat files as duplicates only when their contents match exactly. File sizes first rule out files that cannot match, then MD5 hashes are used to compare contents. Recursive content scans can also find duplicate folders when their contained files have matching contents. Exact matching is the better choice when certainty matters more than finding near-matches.
• Similarity matching: Some scan types use fuzzy matching on filenames or tags. Similar-word matching can produce false positives and significantly slow scans, so it is less suitable for a quick, unattended cleanup.
• Music mode: Compare music by filename or tags, and choose which tags to compare in preferences. Results include music-specific information, which helps when a filename alone is not enough to assess a match.
• Picture mode: Picture-block comparisons can find images that are similar but not identical. An option allows comparisons between images of different dimensions. Because every picture is compared with every other picture, this scan can become CPU-intensive and slow as a collection grows.
• File actions and review: Filter and sort possible matches, compare a result with its reference, and delete, move, or copy marked files. These controls make it possible to verify ambiguous matches before acting, rather than relying solely on automatic selection.

Pricing

dupeGuru is free: its plan costs nothing and covers finding duplicate files on Windows, macOS, and Linux. There is no paid tier or free trial; the project is GPL-3.0 licensed. That makes it a straightforward choice for anyone comfortable using a desktop application, though the free price does not make fuzzy results safe to delete without review.

Platforms

dupeGuru runs on Linux, macOS, and Windows. Packages are available for Windows, macOS, Debian, RPM, Arch Linux, and Ubuntu PPA; Windows downloads include installer and portable versions. Supported interface languages include English, French, German, Chinese (Simplified), Czech, Italian, Armenian, Russian, Ukrainian, Brazilian, and Vietnamese.

Who it's for

Choose dupeGuru if you want a cross-platform folder scanner with both exact-content matching and specialized options for music and pictures. It particularly suits users willing to inspect results before deleting and those who value local file actions such as moving or copying duplicates. It is less compelling for large picture libraries where scan time matters, or for anyone expecting fuzzy matches to be definitive. The maker directs bug reports and feature suggestions to GitHub issues.

Pros and cons

• Pro: Exact content matching compares file contents after using sizes to narrow candidates, making it distinct from filename-only duplicate checks.
• Pro: Standard, Music, and Picture modes cover exact duplicates as well as similar names, tags, and images in one tool.
• Pro: Reference comparisons, filters, sorting, and safeguards support deliberate review before file actions.
• Con: Similar-word matching can create false positives and slow scans, so broad matching takes more supervision.
• Con: Picture comparisons scale quadratically with the number of images and can be CPU-intensive.

Alternatives

Browse the Duplicate File Finders directory to compare more tools in this category.

• Czkawka is another free option, with versions for Android as well as Linux, macOS, and Windows.
• fclones is a free, MIT-licensed command-line utility for Linux, macOS, and Windows; choose it if a command-line tool is preferable to a desktop GUI.
• Folder Size is a Windows freemium option focused on folder and file size analysis, disk-usage charts, and local or external drive scanning.
• Space Wizard is a freemium option for Linux, macOS, and Windows; its Free plan covers the home drive and up to 100 GB per scan.
• AllDup is a free Windows-only option for private users and companies.
• CloneSpy is a free duplicate-file cleanup tool for Windows.
• Duplicate Cleaner is a Windows freemium option with a free basic plan for personal and home use only, not commercial use.

Verdict

dupeGuru is a strong free choice for users who want exact-content checks alongside filename, music-tag, and picture matching across desktop platforms. Its main advantage is that range, supported by review tools and deletion safeguards. Look elsewhere if you need large picture scans to stay fast or want to delete fuzzy matches without manually checking them.