How we test our tools

Every tool on Toolovi is tested before it goes live, and the whole site is checked again after every release. This page describes what we check, what we cannot check, and how to tell us when something is wrong.

Results you can verify

Unit converters use the exact defined factors, for example 1 inch = 25.4 mm, 1 pound = 0.45359237 kg and 1 US gallon = 3.785411784 litres. Each converter page shows its formula and the calculation for the number you entered, so you can check the result with a calculator.

Calculators and counters are tried with inputs whose correct answer is known in advance.

File tools and bad files

Image, PDF and video tools are tested with real photos, documents and clips. We also give them files that should fail: damaged files, files with the wrong ending, empty files and files over the size limit. A tool passes only when it shows a plain message and keeps working. It must never freeze or show a blank page.

Your own files are never part of our testing. Tools run on your device and we do not receive what you open in them.

Phones, computers and browsers

Tool pages are opened by an automated browser at phone widths of 360, 390 and 412 pixels and at a computer screen size, in all 12 languages, including the right-to-left pages in Arabic and Urdu. We look for text that is cut off, parts that stick out of the screen and buttons that are too small to tap.

These automated tests run in the Chrome browser engine. The tools use standard browser features that current versions of Chrome, Edge, Safari and Firefox support, but we cannot test every phone model and browser version. If a tool does not work on your device, please tell us which phone and browser you use.

Accessibility and speed

Tool pages are checked against the WCAG 2.2 level AA rules with an automated accessibility checker: every button and field needs a name and text needs enough contrast. Automated checks do not find everything, so reports from people who use a screen reader are especially welcome.

Speed is measured on a simulated slow phone on a slow connection. Our limit for a new tool is that the main content appears within 2.5 seconds.

Before and after every release

A new tool goes live only when a ten-point checklist is complete. The points are tests that have to pass, among them: the tool works on phone and computer, all 12 languages are written, the page has its questions and answers, and it is linked from the home page.

After every release we crawl every page of the site and check for broken links, missing language versions and invalid structured data. Dates on the guides show when each one was last revised.

Translations

The site is written in English first and translated by us into 11 more languages. Not every translation has been reviewed by a native speaker yet. If a sentence reads wrong in your language, tell us and we will correct it.

Corrections and contact

If you find a wrong result, a broken tool or a mistake in a guide, write to support@toolovi.com with the page address and what you expected. We check every report against the defined values or the original source and correct the page when the report is right.

Toolovi is an independent project. We do not publish staff names; our work can be judged by the tests described on this page, which anyone can repeat.