Show HN: Sleezr – Manage your hosts file without opening a terminal

Sleezr, a native desktop application for managing the system hosts file without a terminal, launched on Hacker News on August 12, 2026, priced at a one-time fee of €4.99 with lifetime updates and no subscription, per the Show HN post.

The app runs on Windows, macOS, and Linux and lets users create named environments per project, apply them in seconds, and flush DNS with a single click — with the correct OS-specific command called automatically under the hood. It also auto-backs up the hosts file before every apply, and handles files with 1,000 or more entries through instant search and IP validation, according to the product page. A three-day free trial requires no credit card, and an interactive demo is available on the site.

The tool was built by HN user locahl_app, who described the motivation as frustration with "juggling sudo, comment blocks, and hidden typos in /etc/hosts every time I moved between local, staging, and client projects." No additional founder names or company details are provided in the source material. The post also hints at a "Team setup," suggesting a multi-user or shared-environment tier may exist or be planned, though no pricing or details for that tier were disclosed.

Editing the hosts file is a routine but error-prone task for developers who regularly switch between local development environments, staging servers, and client-specific network configurations. The need for elevated privileges (sudo on Unix-like systems) and the lack of any built-in GUI on major operating systems makes the workflow a consistent friction point. Sleezr positions itself as a lightweight utility purchase rather than a subscription SaaS product, a pricing model that has found renewed interest among developers wary of recurring-cost tools.

No launch metrics, download numbers, or investor information were included in the source. The creator noted availability to answer questions about DNS-flush handling across platforms and the Team setup, suggesting active engagement with early users post-launch.