Searching for a 大写 to 下划线命名 converter usually means you have messy text and need a dependable 下划线命名 version fast. Paste anything in the box above—sentences, product names, or variable fragments—and the result updates live. As a quick check, “Hello World Example” becomes “hello_world_example”.
Words are lowercase and separated by underscores (_).
Popular in Python, Ruby, and SQL column names. Teams often land here from 大写 searches when they already have a draft string and want reliable 下划线命名 output.
Suppose you are cleaning up copy before publish:
You get: hello_world_example — ready to copy into your doc, CMS, or codebase.
All-capital letters—useful when comparing against shouting copy.
Helpful reference when your source string already looks like 大写.
Produces snake_case tokens that fit Python and SQL conventions.
This page outputs 下划线命名 so you can paste into docs, UI, or repositories.
Normalize `API-KEY` or `API KEY`?
Spaces and hyphens become underscores after lowercasing: `API KEY` → `api_key`.
Postgres column from caps labels?
Paste column labels from a spreadsheet in ALL CAPS, export snake_case for migrations.
Does it insert underscores inside `APIKEY`?
No—there is no break inside the word. Add spaces or underscores in the source if you need `api_key`.
Python `SCREAMING_SNAKE` to snake?
`MAX_RETRIES` → `max_retries`—useful when down-casing config keys for filenames.
Use this 大写 to 下划线命名 page when you want fast, readable 下划线命名 text without a spreadsheet formula or manual retyping. Bookmark it for the next time design, marketing, or engineering needs the same casing call.