Free · Open source · Alpha Reclaim gigabytes of duplicate files on your PC.
SuperDeDuper is a rocket-fast, reliable, safety-first file deduplicator. It finds every duplicate on your drive — photos, videos, downloads, that folder of "final_FINAL_v3" — and never deletes an original you mean to keep. Windows, Mac, and other platforms.
Windows 10 & 11 · macOS (Apple Silicon & Intel) · 64-bit · No installer required
One line on Linux, macOS, or FreeBSD.
Works on any 64-bit Linux, macOS (Apple Silicon or Intel), or FreeBSD. The installer auto-detects your OS and CPU, SHA-verifies the download, and is sudo-aware and idempotent.
curl -fsSL https://superdeduper.io/install.sh | sh
CLI only by default — pass --gui for the desktop app.
Prefer a manual download — macOS (Apple Silicon or Intel), Linux,
FreeBSD, or Windows? Grab any build from the
releases page.
Built for real-world Windows drives
Other dedupers treat Windows like an afterthought. We treat it like the platform — and you can feel it.
Massively faster scans
Reads your drive in the physical order files are stored, not the alphabetical order Windows shows them. On a spinning hard drive that turns a 30-minute scan into a few minutes.
Instant re-scans
The second time you scan the same drive, it finishes in seconds. SuperDeDuper remembers what's changed and only re-checks the new and modified files.
Reversible by default
Duplicates go to the Recycle Bin, not into the void. Every
destructive action asks you to type DELETE first, and
archive mode keeps a manifest so you can put files back exactly
where they were.
Cryptographically certain
When SuperDeDuper says two files are identical, they are — bit for bit. No more "are these really the same?" — it uses a modern cryptographic fingerprint that's impossible to fool.
Knows real duplicates from shortcuts
Windows can store the same file in multiple places without actually copying it. SuperDeDuper sees through that and won't tell you to delete something that wouldn't free any space anyway.
Verified safe downloads
Every release is cryptographically signed and built in public. You can verify your download came from this exact source code, with a single command. No surprises in the binary.
Three steps. No surprises.
- 1
Scan
Point SuperDeDuper at a folder or whole drive. Watch the progress bar — that's it.
- 2
Review
Browse duplicate groups, see exactly which copy will be kept and why. Override anything you don't agree with.
- 3
Reclaim
Send the duplicates to the Recycle Bin, replace them with shortcuts to save space, or archive them with a manifest you can restore later.
See how your PC stacks up.
Opt-in leaderboard, live now. The Ranked tab shows the top 50 across the canonical-bench corpus (link your Google or Discord account to enter); Casual covers per-bracket boards across every submission. Anti-cheat gating is real (HMAC-bound bench runs, per-bracket plausibility caps, server-issued challenge bytes), but the residual is bounded, not closed — call it competitive on the strength of the work, not on raw numbers.
We only collect hardware buckets and timings — never file names, paths, or contents.
⚠ This is alpha software
SuperDeDuper performs destructive operations on files. The defaults are reversible (Recycle Bin, archive with manifest), but bugs can still cause data loss. Always back up first. Test on copies before pointing it at originals. See SECURITY.md for the full safety story.