Entwickler-Tools
Werkzeuge für die Softwareentwicklung.
JavaScript Beautifier
Format and beautify JavaScript code with indentation, readable blocks, and optional minification.
Fake API Directory
Browse free fake REST APIs for testing and prototyping — JSONPlaceholder, ReqRes, FakeStore, and more with live endpoints and copy-ready URLs.
CIDR Calculator
Analyze CIDR blocks, convert prefix lengths to subnet masks, split networks, and check whether an IP belongs to a range.
Regex Tester
Test regular expressions live against sample text with flags, match details, and replace preview.
Timestamp DateTime Converter
Free timestamp converter — Unix epoch, ISO 8601, SQL datetime, and more, both ways. Instant, in your browser.
GraphQL Formatter
Free online GraphQL formatter and pretty printer — format or minify queries, mutations, and fragments in your browser.
Reverse DNS Lookup
Look up PTR reverse DNS records for a public IP address. Resolve hostnames and verify forward DNS (FCrDNS) alignment.
GitHub README Downloader
Download README.md from any public GitHub repository URL — preview Markdown and save the file instantly. Free, no signup.
Port Scanner
Scan common TCP ports on a public host — check which services are reachable from the server.
AES Encrypt
Encrypt and decrypt text with AES-GCM or AES-CBC using a passphrase or hex key, entirely in your browser.
CSS to Tailwind HTML to React
Free CSS to Tailwind converter and HTML to React JSX tool — paste code, preview, and copy utilities or components in your browser.
Base64 Decoder
Decode Base64 strings back to UTF-8 text instantly in your browser with byte-size stats.