Developer Tools APIs

Color data API — convert between hex/RGB/HSL, get color names, and generate schemes

Check if an email domain is disposable/temporary — useful for anti-spam and signup validation

GitHub REST API — search repos, code, issues, users, and get repository metadata

Hacker News — top stories, new posts, comments, and full-text search via Algolia

Generate cryptographic hashes — MD5, SHA-1, SHA-256, and SHA-512 for any input

Compare two JSON documents and return structured diff results

NPM registry — search packages, get metadata, versions, dependencies, and download stats

Python Package Index — package metadata, versions, dependencies, and download files

Generate and decode QR codes — create QR images from text and read QR from images

Generate and decode QR codes with custom size and colors.

Fetch and parse robots.txt for any domain — check crawl rules and sitemaps

Rust package metadata, versions, downloads, and dependencies.

Stack Exchange API — search questions, answers, tags, and user reputation across Stack Overflow

Resolve shortened URLs (bit.ly, t.co, etc.) to their final destination

Generate UUID v1, v4, v5, and nil UUIDs.

Generate and decode UUIDs — v1, v4, v5, and nil UUIDs with timestamp extraction

Internet Archive Wayback Machine snapshots and availability.

Local echo test service