A drawer of small developer utilities — hashes, JWT decoding, cron parsing, colour conversion, QR codes — in one tidy interface you can also self-host.
Type code on the left, watch the assembly appear on the right, colour-matched line by line, across dozens of compilers. The fastest way to see what yours actually does.
Merge, split, compress, sign and convert PDFs in the browser. The quickest fix for most PDF chores.
Thousands of community-made cheat sheets for programming languages, tools and shortcuts, all printable.
A long, maintained list of services with genuine free tiers for developers: hosting, databases, CI, email, monitoring and more.
Like Can I use, but for email clients. Look up any HTML or CSS feature and see whether Gmail, Outlook and Apple Mail will actually render it.
