letools

Find every regex in a codebase, and report which can be driven into catastrophic backtracking

Extract every color in a codebase, and say which ones are not in your palette

Extract every hardcoded number in a codebase, so a person can check them

Extract every URL in a codebase, with its protocol and exact position

Find hardcoded credentials in a codebase, and never print one into the report

Compare the dotenv files in a tree, and say which keys are missing from which

Extract every string in a codebase, with its position, so a person can read them

Check whether a page is scrapeable before the scraper is written, and say when it cannot tell

letools.dev — the hub site for the LE family of VS Code extensions, by nolindnaidoo. Static Next.js + HeroUI on Vercel.

Extract every date and timestamp, and the exact instant each one resolves to

Extract every file path in a codebase, and say whether it still points at anything

Find the Unicode that hides meaning — bidi controls, invisibles, homoglyphs, mixed scripts

Extract every IP address, CIDR block and MAC, normalized and classified by scope

Extract every UUID, ULID, NanoID, ObjectId and Snowflake, and decode the time inside

Find where one dependency is constrained differently across a repository's manifests

Extract every quantity with its unit, normalized, and refuse the ambiguous ones by name

Identify the i18n library a project uses, then audit its catalogs by that library's rules