What is Casual mode?
Casual mode lowers the register of a paragraph for writing that needs to sound like a person, not a press release. It uses contractions ("do not" becomes "don't"), prefers shorter sentences, swaps stiff verbs for conversational ones ("utilize" becomes "use", "commence" becomes "start"), and strips the throat-clearing phrases that turn a friendly paragraph into a corporate one.
What Casual is careful about is going too far. Lowering register isn't the same as adding fake enthusiasm, exclamation points, or "hey friends" filler. The goal is writing that reads natural — a smart person talking, not a brand trying to sound young. If you've ever read marketing copy that's clearly trying to be relatable and isn't, that's the failure mode Casual is tuned to avoid.
When to use Casual mode
Pick Casual when your draft is technically correct but reads stiffer than the audience expects. Most common case: a blog post where one paragraph sounds like it wandered in from a whitepaper. Run it through Casual at Medium strength and you'll get three versions that match the rest of your post. Also useful for social copy where the first draft is too dense, newsletter sections that need to feel conversational, FAQ answers that read like legal disclaimers, and friendly emails where you started typing in business mode by accident.
For full blog drafts, the article rewriter handles the paragraph-by-paragraph workflow at scale. Casual mode plus Medium strength is the standard combination for that use case.
Casual is the wrong call when the audience is paying you for expertise and expects formal register. Don't run a client deliverable through Casual just because the first draft reads dry — the register is probably right; the wording might be the issue, and Standard handles that.
How Casual mode compares to other modes
Casual and Standard look similar on input that's already conversational. The difference shows up when input is stiff: Standard will leave it stiff and only clean wording; Casual will deliberately lower the register. Pick Casual when you want the output to read more relaxed than the input.
Formal is the opposite direction. Academic is the other opposite, with hedging on top. Shorten and Expand are about length, not register, and you can stack them mentally — if your input is too long and too stiff, run Shorten first, then run the output through Casual.
A note on slang: Casual won't reach for current internet slang or trendy phrases. Those date fast and read worse than plain prose six months later. The output uses everyday English a careful editor would let through, not whatever's trending on a given platform.