Observed arrival · 2026-10-19

typetools: 30 conversions in the browser

typetools.dev Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

A browser-based utility for converting data and schemas across 30 formats, from JSON to TypeScript or Avro to cURL to Fetch.

Landing page captured for the 2026-10-19 issue.

For: Developers moving data between code and schema formats
Worth noticing: It lists 30 converters and calls out BigInt precision, optional properties, and Avro union defaults.

Field notes

The interface offers paste-or-drop input and shows a generated result alongside controls for optional properties and strict nulls. Its index groups 30 routes across types, schemas, configuration, databases, and frontend tasks. The site says payload handling stays in a browser Web Worker and highlights edge cases such as 64-bit BigInt precision and Avro union defaults; these are site claims rather than independently verified behavior.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

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