Randora: a Free Randomization Tool for Research Studies

Randora is a free, web-based randomization tool built by Mosio for researchers who need to generate randomization sequences for their studies. It's available at www.randora.org; no account, login, or installation required.

What Randora Does

Randora lets you create randomization sequences using five methods, each with configurable parameters:

• Simple Random — basic random assignment
• Block Randomization — balanced assignment within fixed-size blocks
• Stratified Randomization — randomization within defined strata
• MTI Clinical — minimization for clinical trial designs
• Covariate-Based Balancing — balancing across multiple covariates

Key Features

• REDCap-Compatible Export — Download CSV files formatted for direct import into REDCap's randomization module.
• Built-In Balance Verification — Automated balance checks with quality ratings and recommendations when imbalance is detected.
• Reproducible Results — Optional random seed lets you reproduce identical randomization sequences for audit and verification purposes.
• No Account Required — Fully functional with no sign-up, no login, and no data stored between sessions.
• Privacy by Design — Randora does not collect, store, or transmit participant data. All processing occurs in your browser.

Getting Started

1. Go to www.randora.org
2. Select your randomization method
3. Configure your parameters (number of participants, arms, block sizes, etc.)
4. Generate your sequence
5. Download as CSV (REDCap-ready) or copy your results

Requirements

Randora is optimized for desktop browsers. No software installation or download is needed.

Important: Randora is a research support tool. All randomization outputs should be reviewed and validated by your study team or statistician before use in a live study. Mosio does not guarantee suitability for any specific research protocol.