Small answers.
More time for your day.

The same little tasks come up every day: calculate a discount, change an image format, find a date. O.I. brings practical tools together so you can get a useful answer and carry on.

A toolbox for everyone

All ten tools are free to use, with no O.I. account required. Each page includes the inputs, result, method and relevant limits. The tool code processes your files and text in your browser.

Results you can understand

We explain the conventions that affect an answer: rounding decimal hours to the nearest minute, adjusting dates at the end of a month, and estimating reading time. Check the result and assumptions when using a tool for a professional or contractual purpose.

A transparent business model

This version includes no advertising or audience-tracking scripts added by O.I. The project may be supported by advertising in the future. Privacy information will be updated before those services are enabled.

Open-source components

The QR generator uses qrcode-generator by Kazuhiko Arase, under the MIT license. Calculations and image processing use browser capabilities.