About Olivez
Olivez is a free collection of calculators, converters, generators, file utilities, and practical reference tools. It is built to provide a useful result without hiding the method, assumptions, or important limits.
Why Olivez exists
Many online tools return a number or file without explaining how it was produced. That can be enough for a simple task, but it becomes a problem when the result depends on assumptions, units, rounding, regional rules, source data, or an unfamiliar formula.
Olivez is designed to make the useful part immediate while keeping the supporting information available. A user should be able to complete the task quickly, understand the result, and recognise when another source or qualified professional is needed.
How Olivez is maintained
Olivez develops, tests, and documents practical online tools with an emphasis on clear results, reliable calculations, and useful supporting information.
Each tool is treated as a practical product rather than just a page around a calculation. That includes reviewing the underlying logic, handling invalid and edge-case inputs, checking the interface across devices, documenting important assumptions and limitations, and using reliable source material where a result depends on external standards or reference data.
The level of verification depends on the tool. Straightforward calculations may rely on established mathematical relationships, while finance, health, technical, measurement, or safety-sensitive tools receive additional attention to assumptions, boundaries, and source quality.
Product principles
Useful before impressive
A tool should solve a real task quickly. Inputs, controls, and explanations are kept focused on what the user needs.
Clear about the method
Where the method matters, Olivez explains the formula, assumptions, units, data source, or processing steps behind the result.
Honest about limitations
Estimates are identified as estimates. Important exclusions, uncertainty, compatibility limits, and professional-use boundaries should be visible.
Private where practical
Calculations and file operations are processed locally on your device when the task can be completed reliably there. Tools that need reference data or another service may make a limited server or network request for that function.
How tools are reviewed
A published tool is more than its visible form. The calculation or processing logic, validation, interface, supporting explanation, privacy behaviour, and source material all affect whether it is dependable.
Define the task, intended user, required inputs, and expected output.
Review the calculation, conversion, parsing, or processing logic.
Check invalid inputs, edge cases, units, precision, and failure states.
Test the interface on mobile and desktop, including keyboard and accessibility behaviour.
Document assumptions, limitations, privacy behaviour, and reliable sources where relevant.
Correct the tool when a reproducible error or stronger source is identified.
Accuracy and sources
Olivez aims to use established formulas, documented conversion relationships, current official references, and clearly identified assumptions where they are relevant. Sources are selected for the specific tool rather than added only to make a page appear authoritative.
No online tool is correct in every context. A formula can be implemented accurately while still being unsuitable for a particular contract, medical case, jurisdiction, product, dataset, or technical system. Important results should be checked against current official information or an appropriate professional.
Tool-specific cautions are explained on the relevant page and in the Disclaimer.
Privacy and data handling
Olivez does not currently require an account to use its published tools. Many calculations, text operations, and file transformations run locally on the user's device.
Some features may save preferences or tool state in browser storage. A tool may also use an Olivez server-side service to retrieve reference data, or contact an external service when that connection is necessary for the requested function. These differences should be disclosed rather than hidden behind a general privacy claim.
The Privacy Policy explains local storage, hosting data, share links, external requests, analytics, advertising, and contact messages in more detail.
Access, performance, and compatibility
Olivez is designed for modern mobile and desktop devices. Pages are kept focused, responsive, and usable without requiring an account or paid subscription.
Accessibility, keyboard operation, readable labels, reduced-motion behaviour, clear validation, and reasonable performance are part of the review process. Compatibility can still vary across browsers, devices, extensions, privacy settings, assistive technologies, and file formats.
Corrections and feedback
Errors should be reproducible and correctable. If a calculation, explanation, source, download, or interface appears wrong, report the tool, inputs, observed result, expected result, and a reliable supporting source when available.
Useful reports may lead to a calculation fix, clearer limitation, updated source, content correction, accessibility improvement, or interface change.
Found a problem?
Send a clear report with only the information needed to reproduce it.