4coders

About the project

4coders bundles 18 small developer tools, and every one of them computes inside the browser tab. It covers the everyday conversions in both directions — Base64, URL and HTML escaping, hex, binary, Base32, Unicode escapes, Morse and Caesar shifts — plus inspectors for JSON, JWTs and Unix timestamps, a text diff that exposes invisible characters like BOM, NBSP and zero-width joiners, a hash panel that runs every algorithm at once, and generators for UUIDs, passwords, QR codes and barcodes. A ⌘K palette jumps straight to any of them, and each tool page carries its own reference section in English and German: what the format actually is, what people use it for, and where to read more. Whatever you paste stays in the page's memory — nothing is uploaded, and the only thing written to browser storage is your light/dark preference. There are no accounts, no ads and no cookies at all — the traffic measurement is cookieless, and the language lives in the URL. A tool page that has finished loading keeps computing with the network unplugged — only the QR and barcode renderer fetches its module the first time you use it.

Highlights

• ✓Encoders for Base64, URL, HTML entities, hex, binary, Base32, Unicode escapes, Morse and Caesar shifts 0 to 25
• ✓Inspectors that format, minify and validate JSON, decode JWT claims and convert Unix timestamps
• ✓Hashing with MD5, SHA-1/256/384/512 and CRC32 in one pass, plus a compare field that names the matching algorithm
• ✓Generators for UUIDs and passwords with an entropy read-out, QR codes and five barcode symbologies
• ✓A bilingual reference section on every tool page: what the format is, common use cases, further reading