NNixBiz.

Desktop App · Updated Jul 2026

dupehunt

Duplicate File Finder. Pick folders, scan for byte-identical copies, review the groups with previews, and move the extras to the OS Trash. Fully local, nothing leaves the machine, and nothing is ever permanently deleted.

dupehunt screenshot
Key features
  • Folder selection — add roots via the native multi-select folder dialog or drag-and-drop onto the window; remove roots as chips; duplicate roots are de-duplicated.
  • Two-stage scan engine — fast-glob walk of every root, bucket files by exact size, then hash only the size-collision candidates with a streamed SHA-256…
  • Live progress — batched progress events: files seen, candidates, groups found, and a running "reclaimable so far" figure with a…
  • Cancellable — Cancel (or Esc) sets an abort flag checked between files and during hashing; the read stream is destroyed mid-file and partial results are discarded, returning to…
  • Results view — groups sorted by wasted bytes; each group panel shows N files × size — wasted, and every file row shows name, folder, size, modified date, a lazy-loaded 64px…
  • Keep rules — one click to Keep newest, Keep oldest, or Keep in a chosen root folder; auto-selects every other file in each group. Manual per-row checkbox override always…
  • Guardrails — never lets you select every file in a group (the last kept file locks); skips symlinks; skips 0-byte files by default; enforces a minimum-size filter.
First releaseJul 2026
Last updatedJul 2026
PlatformWindows

Read before you use dupehunt

dupehunt is experimental software shared free of charge. Using it means accepting the terms below in full. If you do not accept them, do not download or run it.

Experimental, unfinished software
This is a personal side project released as an experiment, not a commercial product. It may contain bugs, may behave unpredictably, may stop working after an operating system update, and may be abandoned at any time without notice or migration path.
No warranty of any kind
The software is provided "AS IS" and "AS AVAILABLE", without warranty of any kind, express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, title, and non-infringement. No promise is made that it is accurate, reliable, secure, uninterrupted, or error-free.
You accept all risk
You install and run this software entirely at your own risk. Before using it, back up anything you care about. Tools that rename, move, delete, compress, encrypt, sync, or otherwise modify files can cause irreversible data loss if they behave unexpectedly or are used incorrectly.
No liability
To the maximum extent permitted by applicable law, NixBiz and Anand Bhandari accept no liability for any damages whatsoever — including data loss, corrupted or deleted files, lost profits, business interruption, hardware issues, security incidents, or any direct, indirect, incidental, special, consequential, or punitive damages — arising from or connected to your use of, or inability to use, this software.
Unsigned builds and security prompts
Builds are not code-signed. Windows SmartScreen, macOS Gatekeeper, or your antivirus may warn about or block them. Only ever download from an official NixBiz link, and verify anything you run. Never disable your security software on account of this project.
Your data, keys, and third-party services
These tools are designed to run locally, but some features can connect to third-party services you configure yourself. You are responsible for your own API keys, credentials, costs, and for complying with those providers' terms. Any charges you incur with a third-party provider are yours alone.
Not for critical or regulated use
This software is not intended for, and must not be relied on in, any safety-critical, medical, legal, financial, or otherwise regulated setting, nor anywhere failure could cause injury, loss, or legal exposure. It is not a substitute for professional advice or a supported commercial tool.
Free, and no support promised
The software is free to use. There is no service level agreement, no guaranteed support, no guaranteed updates, and no guaranteed compatibility with your system or with future versions.
Your responsibilities
You are responsible for using the software lawfully, for respecting the rights of others, and for ensuring your use complies with any policies that apply to your device, employer, or jurisdiction.

These terms sit alongside the Terms of Service and Privacy Policy. Where a project ships its own licence, that licence governs the software itself.

Accept the terms to continue