Instantly vs Just like that

When to use each in English, with meaning, register, and examples.

Instantly

Top 5,000 (fairly common)B2adverb

Just like that

InformalTop 2,000 (common)
Most formal: InstantlyMost common: Just like that
 InstantlyJust like that
Pronunciation🇬🇧 /["/ˈɪnstəntli/"]/🇺🇸 /["/ˈɪnstəntli/"]/🇬🇧 //dʒʌst laɪk ðæt//🇺🇸 //dʒʌst laɪk ðæt//
MeaningRight away, without waiting.Suddenly or easily without effort.
ExampleHer voice is instantly recognizable.He finished his homework, and just like that, he was free to play.
RegisterNeutralInformal
How commonTop 5,000 (fairly common)Top 2,000 (common)
CEFR levelB2-
Part of speechadverb
Collocationsinstantly available, instantly recognizable, instantly regret, instantly noticeablejust like that, just like magic, just like before
Antonymsgradually, slowly, eventually-
Common mistakesUsing 'instantly' with past tense incorrectly, e.g., 'I instantly saw' instead of 'I saw instantly'., Confusing it with 'immediately' when the emphasis on speed differs., Forgetting to use it with an action verb.Used in formal contexts where a more precise phrase is needed., Confused with similar phrases like 'just so' which means 'exactly like this'.
Usage notesUse 'instantly' in both spoken and written English to emphasize immediate action. It's appropriate in most contexts but less common in very casual conversations.Used in casual conversation to indicate something occurs quickly or unexpectedly. Avoid in formal writing.

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Just like that

Frequently asked questions: Instantly vs Just like that

What's the difference between Instantly and Just like that?

Instantly: Right away, without waiting. Just like that: Suddenly or easily without effort.

Which is more formal: Instantly and Just like that?

Instantly is the most formal of these.

Which is more common: Instantly and Just like that?

Just like that is the most common in everyday English.

Can you show an example of each?

Instantly: Her voice is instantly recognizable. Just like that: He finished his homework, and just like that, he was free to play.

Can I use Instantly and Just like that interchangeably?

Not always. Instantly and Just like that are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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