Contact
Last updated: 2026-10-15
We read every message.
Found a bug, spotted a wrong measurement, or have an idea to make Online Ruler better? Send us a note — we're a small project and your feedback genuinely helps.
The fastest way to reach us is by email:
What to include
- Your device and browser (e.g. Windows / Chrome) if reporting a display or calibration issue.
- A short description or screenshot of the problem.
- For content corrections, the page URL and the change you'd suggest.
Response time
We aim to reply within a few business days. Because this is a free tool run by a small team, please allow a little extra time during busy periods.
Privacy
Any information you send is used only to reply to you and is not added to a marketing list. See our Privacy Policy for details.