About Saharienne

Free, professional web tools.

Saharienne is an independent maker of free web tools. We build small, reliable utilities that each solve a single problem well, show their workings, and keep your data under your control. Every tool is free to use and requires no account.

Our two platforms

OpsCalc Tools is a set of 35 engineering-grade calculators for operations, production, and business decisions — from Overall Equipment Effectiveness (OEE), Takt time, and cycle time, to MTBF and maintenance reliability, energy cost, inventory sizing (safety stock, reorder point, EOQ), and finance (ROI, payback, break-even, NPV). Each calculator shows its formula, units, and a worked example so you can check the result.

File Size Tools helps you make any file fit an upload or format limit: compress images to an exact KB/MB target, resize images, and reduce PDF size. Everything runs in your browser, so your files are never uploaded to a server.

What we value

• Free and open access. No account, no paywall.
• Transparency. Results and methods are shown, not hidden.
• Privacy. We minimize data collection and process files locally where possible.
• Focus. Each tool does one job well and loads fast on any device.

How we keep the tools free

To support hosting and ongoing development, we plan to display advertising via Google AdSense in the future. Ads are not active yet; when they are, we will update our Privacy Policy and, where required, ask for your consent first.

Contact

We welcome questions and feedback at contact@saharienne.org or via our Contact page.