Programming

Builds crontab schedules from pickers instead of memorised field syntax, and shows the next run time on every change so a schedule that never fires is obvious.

MD5, SHA1, SHA256 and SHA512 digests computed locally; the implementation is diff-tested against Node crypto so the results match other tools.

Signs JWTs with the browser WebCrypto API (HS256 / HS512); the secret never leaves your machine.

Highlights matches and capture groups live, with the position of each hit. The pattern and the text stay in your browser.

Generates v4 UUIDs with crypto.randomUUID, in batches when you need more than one.

Parses a cURL command into a structured request and emits the equivalent Python requests, fetch or Go code, headers and body included.

Generates a .gitignore from the languages and tools you tick, merging duplicate rules and grouping them with comments.

Produces the basic SEO tags — title, description, canonical and the OG/Twitter card set — in one copyable block.

NanoIDs with adjustable length and alphabet, drawn from the browser crypto source — good for short IDs and invite codes.

Configures allow and disallow rules per user-agent group, with an optional sitemap line and a full preview before copying.

Turns a list of URLs into sitemap-protocol XML, with optional lastmod, changefreq and priority entries.

Turns a title into a URL slug, with optional pinyin for Chinese and a choice of separator.

Generates time-sortable ULIDs: the first 48 bits are a millisecond timestamp, so they sort in insertion order.