Free alternatives to Impact
Impact (Stephenson Blake): Impact, designed by Geoffrey Lee in 1965, is an ultra-condensed, very bold grotesque built to do exactly what its name says. Bundled with Windows for decades, it became the default meme font and a headline staple.
Impact ships with Windows under a system license, which does not cover embedding it freely in every product, and standalone licenses are sold through Monotype. On non-Windows platforms you need a licensed copy or a substitute.
Anton is the go-to free Impact substitute: a single heavy, tightly condensed sans reworked from classic advertising typefaces. At headline sizes the silhouette is very close.
Archivo Black matches Impact's blunt weight but sits wider, giving headlines the same force with a little more air. Useful when Impact feels too compressed.
Fjalla One is a medium-contrast condensed display sans, slightly friendlier than Impact, and it stays readable a bit smaller than the heavier options.
Oswald is a condensed gothic family with multiple weights, so it covers Impact-style headlines while also giving you lighter styles Impact never had.
Bebas Neue is caps-only but shares the tall, compressed poster energy Impact is used for. A common pick for meme text, YouTube thumbnails, and banners.
Impact is a trademark of its owner and is not distributed by DaFontFonts. This page recommends independent open-licence typefaces with a comparable feel; they are not copies and render with their own metrics and details.
Questions
Can I use Impact commercially?
If it came with your licensed copy of Windows, you can use it in documents and designs you create, but redistributing or embedding the font file itself usually requires a separate license from Monotype.
What is the meme font, and is there a free version?
Classic image memes use Impact with a white fill and black outline. Anton, free under the SIL Open Font License, is the closest open substitute and is what most meme generators actually serve.