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The quickest way is to enter your username into a browser checker such as GittyAge, which shows your account creation date and account age. The most reliable way is GitHub’s own REST API: request GET /users/{username} and read the created_at field. Neither needs a token for a public profile.
Method 1: Use a browser checker (GittyAge)
- Confirm the account’s current GitHub username.
- Open the checker, type the name into the “GitHub username” field and select “Check.”
- Read the three values it displays: the username, “Created at” and “Account age.”
The page says it uses public GitHub data and no token. That is the tool’s own claim and has not been independently audited, so treat it as stated behavior, not a security guarantee. The page also does not document how it rounds elapsed time, so use the raw timestamp if you need precision.
Method 2: Query GitHub’s REST API directly
GitHub’s documentation describes the user endpoint as providing “publicly available information about someone with a GitHub account.” It can be called without authentication when you only request public resources.
- Open
https://api.github.com/users/USERNAMEin a browser, replacing USERNAME with the account name. From a terminal, runcurl https://api.github.com/users/USERNAME. - Find the
created_atline in the JSON response. - Read the value as a UTC timestamp. It looks like
2008-01-14T04:33:35Z, which is the example value for theoctocatprofile in GitHub’s docs. It is not a real figure for your account. - For an exact age, subtract that timestamp from the current time.
Method 3: Search users by creation date
GitHub’s user search has a created: qualifier. The documentation gives these examples:
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created:<2011-01-01finds accounts created before a date.created:>=2013-05-11finds accounts created on or after a date.created:2010-01-01..2011-01-01finds accounts created within a range.
This is for filtering many accounts. For one known username, the REST endpoint is more direct.
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Which method should you use?
| Method | Best when | What it shows | Consideration |
|---|---|---|---|
| Browser checker | You want the simplest interface | Creation date and calculated account age | You rely on the tool’s stated behavior |
| REST API | You want a reproducible source or the raw timestamp | created_at in the user JSON |
Needs a web request and reading one field |
User search created: |
You want to filter accounts by date or range | Matching user search results | Not the most direct single-user lookup |
Limits and troubleshooting
- A 404 does not prove the account never existed. GitHub notes that some Enterprise Managed User accounts, and GitHub App bots installed in organizations using Enterprise Managed Users, require an authorized request. Without authorization the API can return
404 Not Found. - Check the username first. Lookups use the current username, so a renamed account will not match its old name.
- Checker and API results should agree on the date. If they differ, trust the API’s
created_at, since it is the official field. Differences in the “age” figure usually come from the tool’s own rounding, which it does not document.
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