About ratelimitlens

Rate-limit headers rarely give a straight answer. Is x-ratelimit-reset epoch seconds, epoch milliseconds, or seconds-until-reset? Is Retry-After seconds or an HTTP-date? APIs differ, and getting it wrong means retrying too early or waiting too long.

ratelimitlens disambiguates by a disclosed magnitude heuristic (≥1e12 → ms, ≥1e9 → epoch seconds, else delta), follows RFC 9110 for Retry-After, supports X-RateLimit-*, legacy RateLimit-* and the IETF combined RateLimit header, and shows the absolute retry time, a countdown, quota remaining and a per-header explanation. It is a static page — nothing you paste is uploaded.