MetaSyn Statistical Converter by MetaSyn Academy

MetaSyn Statistical Converter is a free, browser-local statistical conversion tool for meta-analysis and evidence synthesis.

It helps researchers transform selected already-reported statistical quantities into supported meta-analysis-ready representations while keeping the formula, analysis scale, assumptions, warnings and uncertainty source visible.

Supported operations in version 1.0.4

• Standard error (SE) → sampling variance
• Sampling variance → SE
• Two-sided Wald confidence interval → SE + sampling variance
• OR, RR, HR or rate ratio + two-sided Wald CI → natural-log effect + SE + sampling variance
• Ratio estimate ↔ natural-log ratio estimate
• Natural-log ratio + SE or sampling variance → ratio estimate + Wald confidence interval

Methodological transparency

• Shows the calculation and analysis scale
• Requires explicit acknowledgement for supported Wald-CI reconstructions
• Warns when interval asymmetry may be incompatible with the assumed Wald form
• Keeps full-precision values internally and separates display rounding from calculation

What it does not do

• It does not select the appropriate effect measure for you
• It does not calculate effect sizes from raw 2×2 or continuous-group study data
• It does not estimate means or SDs from medians, ranges or IQRs
• It does not treat t-based, profile-likelihood, exact, bootstrap, Bayesian or one-sided confidence intervals as ordinary Wald intervals
• It does not reconstruct uncertainty generically from P, t, F or z statistics in version 1

Validation

Version 1.0.4 uses the same validated statistical engine as the Chrome/Edge release and passed the predefined 220-case suite: 200 direct cases plus 20 cross-method/round-trip cases. Passing this suite is evidence of predefined test performance, not a universal accuracy guarantee.

Privacy

Calculations run locally in Firefox. The extension has no account system, analytics, advertising, backend API, browsing-history access, content scripts or host permissions, and it does not save calculation history.

Methodology and validation:
https://metasyn.academy/free-systematic-review-templates/meta-analysis-statistical-converter/

Privacy policy:
https://metasyn.academy/free-systematic-review-templates/meta-analysis-statistical-converter/privacy/

Academic support:
https://metasyn.academy/contact-support-faq/

MetaSyn Statistical Converter is an independent MetaSyn Academy research tool. It is not affiliated with or endorsed by Cochrane, the metafor project, Mozilla, or any publisher or standards organization.