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Generators & Calculators

Generate IDs, passwords, timestamps, QR codes, barcodes, random lists, and test data.

11 tools

Topic cluster

Generators & Calculators

Generate IDs, passwords, timestamps, QR codes, barcodes, random lists, and test data.

UUID Generator

Instantly generate secure, random UUIDs (version 1 or 4) in bulk.

ID Generator

Generate UUID v4, UUID v7, ULID, and NanoID in bulk with configurable options.

Password Generator

Generate secure, cryptographically random passwords instantly.

Fake IBAN Generator

Generate realistic, checksum-valid IBAN samples for QA and testing without exposing real banking data.

Supporting guides

Hash functions compared

Choose hash algorithms deliberately when reviewing evidence or compatibility.

base64-encoding-when-and-how-to-use-it

Validate JSON before API requests

A checklist for validating request payloads before replaying or sharing them.

Common tasks

Use this hub for local IDs, timestamps, QR codes, barcodes, passwords, random lists, and test fixtures.

Generate stable placeholder values for examples and documentation.
Create timestamps, UUIDs, and random data without embedding real user records.
Prepare repeatable fixture values before contract and payload review.

Related workflows

JSON to TypeScript contract review

Turn representative JSON into TypeScript, query edge fields, and compare contract changes before implementation.

Open workflow

API payload cleanup

Validate, convert, diff, and document request payloads before they leave your browser.

Open workflow

Tutorials and checklists

JSON Schema validation checklist

Review schema coverage, required fields, and compatibility before implementation.

Validate JSON before API requests

A checklist for validating request payloads before replaying or sharing them.

JSON vs JSON5 differences

Know which syntax belongs in strict JSON contracts and which does not.

Category FAQ

Can generated values replace real production examples?

Often yes. Generated IDs and timestamps are safer when the exact production value is not needed.

Where do generators fit in workflow pages?

They provide safe placeholder values for payload, contract, and documentation examples.

Unix Timestamp

Convert epoch timestamps instantly to human-readable dates (supports both seconds and milliseconds).

Open

UUID Generator

Instantly generate secure, random UUIDs (version 1 or 4) in bulk.

Open

Lorem Ipsum

Instantly generate dummy text for your layouts and mockups.

Open

Password Generator

Generate secure, cryptographically random passwords instantly.

Open

QR Code Generator

Generate QR codes with custom sizes and colors. Download as PNG or SVG.

Open

Barcode Generator

Generate CODE128 and EAN-13 barcodes with SVG/PNG export and checksum-safe normalization.

Open

Fake IBAN Generator

Generate realistic, checksum-valid IBAN samples for QA and testing without exposing real banking data.

Open

List Randomizer

Shuffle, deduplicate, and sample list items with optional seeded randomness for reproducible QA runs.

Open

ASCII Art Generator

Convert text or images to ASCII art.

Open

ID Generator

Generate UUID v4, UUID v7, ULID, and NanoID in bulk with configurable options.

Open

Image Privacy Workbench

Strip metadata from supported images by local re-encoding and follow a safe screenshot redaction workflow before sharing.

Open