Generate UUIDs, random strings, QR codes, barcodes, placeholder text and cron schedules. No watermarks, no expiry, no sign-up.
6 tools in this category.
Generate v4, v7 or v1 UUIDs in bulk — including the time-sortable v7 that makes a much better database key.
Generate secure random strings for API keys, tokens and test data, from preset or custom alphabets.
Generate placeholder paragraphs, sentences or words — optionally wrapped in <p> tags.
Generate a downloadable QR code for any text or URL — no watermark, no tracking redirect, no expiry.
Generate retail and logistics barcodes — CODE128, EAN-13, UPC-A and more — as downloadable PNGs.
Translate a cron expression into plain English and preview its next run times — including the day-field OR rule most tools get wrong.
Six tools for producing values rather than transforming them: identifiers, codes, placeholder copy and schedules. The QR Code Generator and Barcode Generator output files you own outright — no watermark, no tracking redirect, no expiry. That is worth checking wherever you generate a QR code, because a great many free generators encode a URL that points at their own domain and forwards to yours, which means your code stops working the day that service does.
The UUID Generator produces version 4 identifiers from the browser's cryptographic random source. UUIDv4 is the right default when you need an identifier that can be created independently in several places without coordination and without collision. It is the wrong default for a clustered primary key in a database that stores rows in index order: random values scatter inserts across the whole index, fragmenting pages and slowing writes as the table grows. Where that matters, a time-ordered scheme such as UUIDv7 or a database-native sequence performs far better.
The Cron Expression Generator exists because cron syntax is famously easy to write and hard to read back. Five fields with different ranges, two of which overlap in confusing ways — day-of-month and day-of-week are ORed together, not ANDed, which is why an expression meant to run on the first Monday of the month usually runs far more often than intended.