UUID Generator

How to use the uuid generator

Choose a quantity from 1 to 1,000, optional uppercase output and hyphenation, then generate. Copy the results or download a text file.

Supported features and limitations

Generates random UUID version 4 only. Requires a modern browser with Web Crypto. Random UUIDs do not guarantee uniqueness and should not replace authentication secrets.

Related tools

Base64 Encoder / Decoder

• Meta Tag Generator — Generate escaped SEO, Open Graph and Twitter card tags from your page details.
• JSON Diff Checker — Compare JSON values by structure and see added, removed and changed paths.
• JWT Decoder — Read a JWT header, payload and timestamp claims locally in your browser.
• Cron Expression Generator — Build five-field cron schedules and preview upcoming execution times in UTC.
• YAML ↔ JSON Converter — Convert YAML to JSON or JSON to YAML with clear validation errors.
• Base64 Encoder / Decoder — Encode UTF-8 text or files as Base64 and decode standard Base64 or Base64url locally.
• Unix Timestamp Converter — Convert Unix seconds or milliseconds to UTC and local time, or convert a UTC date to a timestamp.
• Regex Tester — Test JavaScript regular expressions, highlight matches and inspect captured groups.
• SQL Formatter — Format SQL queries for PostgreSQL, MySQL, SQLite, SQL Server and other dialects in your browser.
• JSON Schema Generator — Infer a draft 2020-12 JSON Schema from sample JSON, including nested objects and mixed arrays.
• Hreflang Generator — Generate HTML alternate-language tags from language codes and page URLs without fetching any website.
• n8n Workflow JSON Checker — Check exported workflow JSON for structural issues, duplicate nodes and broken connection references.
• Invoice Generator — Create an invoice with line items, a discount and a manually entered tax rate, then print or save as PDF.
• ROI Calculator — Calculate simple return on investment, net gain or loss from investment cost and total returns.