Contact Us
We read every message
Found a bug? A calibration looks off on your device? Have a feature idea? We'd love to hear from you. The fastest way to reach the team is email.
hello@onlineruler.example
We aim to reply within a few business days.
Before You Write
A few quick checks that help us help you faster:
- Confirm your browser zoom is at 100% — zoom changes effective pixel density and affects measurements.
- Re-run calibration for your screen if measurements look wrong.
- Note your device model and browser (e.g. "iPhone 15, Safari") so we can reproduce.
Report a Bug
Please include what you did, what you expected, and what happened. A screenshot helps enormously. Sensitive images are never uploaded by the tool — you choose what to send us.
Feature Requests
We prioritize features that keep the tool fast, private, and accurate. Tell us how you use the ruler and what would save you time.
Privacy Note
Anything you share with us by email is used only to respond to you. We do not add you to marketing lists. See our Privacy Policy for more.