Local and privacy-first
Accuracy-first services
These tools either perform direct unit calculations or reproduce values supplied by the user. They do not claim brand-specific fit.
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How to measure library
Step-by-step measurement guides with neutral diagrams.
Open tool →⌐Eyewear frame dimensions
Read lens, bridge and temple measurements without making a fit promise.
Open tool →▦Size chart generator
Create a clean chart from values supplied by the seller.
Open tool →▤Item measurement card
Turn item measurements into a downloadable listing image.
Open tool →Embed table builder
Generate self-contained HTML for a shop or product page.
Open tool →★Popular conversions
Quick links to frequently used conversion pages.
Open tool →✓Reference register
See exactly what each source supports and what remains approximate.
Open tool →