What's the difference between 'log in' and 'login'?

'Log in' (two words) is the verb: 'Please log in to continue.' 'Login' (one word) is a noun or adjective: 'Enter your login details' or 'Go to the login page.'

Should I say 'log in' or 'sign in'?

Both are correct and widely used. 'Sign in' is more common in consumer apps (Google, Microsoft). 'Log in' is more common in technical contexts. Use whatever your product or team uses.

Is it 'log in to' or 'log into'?

Both are acceptable, but 'log in to' (three words) is more standard. 'Log into' is increasingly common and understood, but style guides often prefer 'log in to.'

How do I use 'logged in' as an adjective?

Use it to describe someone's state: 'You need to be logged in to view this page' or 'Only logged-in users can comment.'

Can I say 'do login' or 'make login'?

No. Say 'log in' as the verb: 'I need to log in' or 'I logged in.' Don't use 'do' or 'make' with login.

What preposition comes after 'log in'?

Use 'to': 'Log in to the server,' 'Log in to your account.' The preposition 'to' is required when specifying what you're logging into.

What Does "Log In" Mean in Tech?

Commonness
Versatility
Formality	CasualFormalNeutral
Spoken ↔ Written	SpokenWrittenBoth
Directness ↔ Diplomatic	DirectDiplomaticNeutral
Region

Say it like this

✓Can you log in to the staging server and check the logs?

✓I can't log in—it keeps saying invalid password.

✓Make sure you're logged in before you try to access the dashboard.

✓Users need to log in with their SSO credentials.

✓Log in to Jira and assign the ticket to yourself.

Real examples

Standup

"I couldn't log in to the production server this morning, so I'm blocked until DevOps fixes my access."

Slack message

"Hey, can you log in to the admin panel and check the user permissions?"

GitHub PR

"This PR adds a new error message when users fail to log in after 3 attempts."

Jira ticket

"Bug: Users cannot log in using Safari on iOS 16."

Retrospective

"We lost time because half the team couldn't log in to the new CI/CD tool."

Sprint planning

"We need a story for the 'remember me' feature so users don't have to log in every time."

Pair programming

"Can you log in to your GitHub account? I want to see if you can access the private repo."

Don't say this

✕I need to login to the system.

✓I need to log in to the system.— As a verb, 'log in' is two words. 'Login' (one word) is a noun or adjective.

✕Log in the system.

✓Log in to the system.— You log in TO something. The preposition 'to' is required.

✕I logged in my account yesterday.

✓I logged in to my account yesterday.— You log in TO an account, not just 'log in my account'. The preposition is needed.

Other forms

phrasal verb (base)

"Please log in to continue."

phrasal verb (past)

logged in

"I logged in this morning."

phrasal verb (continuous)

logging in

"I'm logging in now."

noun/adjective

"Enter your login credentials."

adjective (past participle)

logged in

"You need to be logged in to see this page."

Often used with

stay logged inOption to keep your session active

unable to log inCommon phrasing in bug reports and tickets

Similar words

sign inVery similar meaning; more common in consumer apps like Google or Microsoft

authenticateMore technical; emphasizes the security verification process

accessBroader meaning; logging in is one way to access something

connectOften used for servers or remote systems (e.g., 'connect to the VPN')

Opposites

log outsign outdisconnectend session

Practice

Try it

4 quick exercises

Choose the most natural phrasing

1. Telling a coworker how to access the system:

You need to login the admin panel.You need to log in to the admin panel.You need to log in at the admin panel.

Find the error

2. I can't login to my account since yesterday.

I can't login to my accountto my accountsince yesterday

Complete the sentence

3. Users need to _____ with their company email to access the dashboard.

Make this more natural

4. I made login to the system at 9 AM.

More words

log out sign in authentication credentials session SSO (Single Sign-On)two-factor authentication

Questions

Quick poll

Have you said "log in" in a standup this week?

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