June 23, 2026
Red squiggles, big feelings
In memory of the man who put red and green squiggles under words
The man behind Word’s famous squiggles is gone, and commenters got emotional, nostalgic, and weirdly feral
TLDR: Tony Krueger helped create Word’s famous red and green squiggles, the little lines that flag mistakes as you type, and commenters reacted like a piece of internet history had just been unmasked. The mood swung from heartfelt praise to nostalgic keyboard-warrior jokes, with side drama over circular sourcing and calls for imaginary yellow squiggles for bad thinking.
A quiet computer legend has left the chat, and the internet is suddenly realizing just how much one man shaped everyday life. Tony Krueger, the longtime Microsoft Word developer credited with making those now-ubiquitous red and green squiggles show up under your mistakes, is being remembered as the guy who turned spell-check from an annoying interruption into a live, blinking little judgment system. In plain English: before Tony’s work, checking your writing could freeze what you were doing. After him, your typos got called out instantly. Brutal? Maybe. Useful? Absolutely.
But the real show was in the comments, where grief collided with nostalgia, snark, and comedy. One camp was pure retro-energy: “F7 gang standup!” cried one commenter, summoning the old-school keyboard shortcut crowd and mourning the loss of Word’s more chaotic design era, complete with animated text and wild underlines. Another reaction hit a more bittersweet note, wishing stories like this were told before people pass away, which gave the thread a genuinely emotional sting.
Then came the mini-drama. One commenter pointed out a delightfully nerdy loop in the sourcing: the article cites Wikipedia, and Wikipedia cites the article right back. Internet truth, but make it Spider-Man meme. And of course, the jokes landed fast: one person wanted a magic button that auto-fixes the last typo after gathering context, while another demanded yellow squiggles for logic errors—which, honestly, would keep half the world employed forever. The verdict? Tony’s feature was iconic, everyone used it, and the comment section turned a software obituary into a surprisingly funny, heartfelt squiggle-fest.
Key Points
- •The article memorializes software developer Tony Krueger and argues that his most widely felt contribution was to Microsoft Word rather than his documented Windows port of *Chip’s Challenge*.
- •Krueger worked on multiple Word releases, including Word 1.0, 1.1, 2.0, Word for OS/2, Word for Mac, and later Word 6.0 and beyond.
- •Early Word spell checking was a blocking process, even in Auto Spell Check mode, which could interrupt users and lead some to disable it.
- •Krueger is credited with making spell checking unobtrusive and with introducing immediate red squiggles for spelling problems and later green squiggles for grammar issues.
- •The article says the squiggle approach later spread broadly to many word processors and other software, while also noting that Krueger reverse-engineered the MS-DOS version of *Chip’s Challenge* to create its Windows port without source code.