PID Toolkit By ADMX

Generate PID

Create 6-character pseudonymised IDs, with an optional appended date (format: XXXXXX-YYYYMMDD).

QR Code

Render a QR for the PID output text (payload matches exactly). Adjustable size; copy/download/print; human-readable text shown beneath the QR.

Open QR Tool

PID Verification

Verify a given PID by recomputing it from name, DOB, and seed. Supports verifying a PID with an appended date (when specified).

Open Verifier

Build Your Own PID Toolkit

Generate a ZIP containing all toolkit files with your own unique "pepper" inserted into settings.js. This can be run offline, or on your own servers.

Open Builder

CSV — Bulk Pseudonymisation

Use a CSV with first_name, last_name, dob columns. Adds sanitised_first_name, sanitised_last_name, pid, and pid_with_date only when row-level date columns specify a date.

Open Bulk Pseudonymisation

CSV — Bulk Verification

Use a CSV with first_name, last_name, dob, and pid. Recomputes expected values and flags mismatches; supports per-row date columns.

Open CSV Verification

Notes

Pepper: set in settings.js and defines the PID “universe”. Rotate it to produce a new scheme.

Seed: must remain confidential and is never stored or exported.

Sanitisation: names are normalised (accents removed; hyphens/spaces unified; apostrophes ignored; uppercase).

QR payload: matches the text PID exactly (with date if appended; without if not).

Local-only: everything runs in your browser; no data is transmitted.

One-way: PIDs are generated using a one-way SHA-256 based pseudonymisation process. Participant details cannot be recovered from the PID alone. Re-identification would require knowledge of the original inputs and the study seed used to generate the identifier.

Manual Verification: Whilst the probability of PID collisions within the same namespace is extremely low (approximately 1 in 2.2 billion possible identifiers), it is not zero. Always check your database for existing identifiers before assigning a new participant. Individuals with identical names and dates of birth will generate the same PID when using the same seed and pepper. In these situations, add a middle initial, middle name, or another agreed differentiator before generating the identifier. The CSV tools will not currently check for duplicates.