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JUNE 23, 2026 · 3 MIN READ

PRISMA flow diagrams that balance: the new PRISMA 2020 tool

Systematic reviewers lose hours to a diagram whose main job is arithmetic. So we did the arithmetic.

What the tool does

Enter records identified per source, duplicates removed, records screened and excluded, reports sought and not retrieved, reports assessed and excluded with reasons, and studies and reports included. The tool fills the PRISMA 2020 template, including the optional 'other methods' column, and exports a vector diagram.

The arithmetic check

Identified minus duplicates must equal screened; screened minus excluded must equal sought; and so on down the diagram. The tool checks every equation as you type and shows exactly which box does not balance. Reviewers look for these mismatches first; now they will not find them.

Exclusion reasons with counts

PRISMA 2020 requires each exclusion reason to carry a number. The tool lists reasons as editable rows, sums them, and refuses to export if the sum does not match the excluded total.

2009 versus 2020

Many reviews still use the 2009 layout. The 2020 diagram separates studies from reports, adds the retrieval step, and moves 'other methods' to its own track. The tool produces only the current template so that updated reviews are not rejected on formatting.

Editable like everything else

Boxes, arrows, and labels are live objects. If a journal wants different wording or a different arrow style, edit the exported SVG or change it in the tool and re-export. Read the box-by-box guide for the reporting details.

Make your next figure in about 30 seconds.

Free to start. No credit card. Every element stays editable.