Fix · GitHub and Git

Warning: LF will be replaced by CRLF

What you may see

Git prints line ending warnings on every commit
Every line of a file shows as changed

Most likely cause

Windows and Mac/Linux mark the end of a line differently, and Git is converting between them.

Check first (about two minutes)

Run git diff --stat: do whole files show as changed with no real edit?

The fix prompt

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The exact error or what you see

What you did before it happened

Kept only in this browser, on this device. Keys and passwords are removed before anything is saved.

Prompt language

You are a patient senior engineer who knows Git and GitHub very well and explains them to people who are not developers. I am not a developer, so explain every step in plain words and tell me exactly which button, menu or command you mean. If you are not sure about something, say so; do not guess.

THE PROBLEM
Warning: LF will be replaced by CRLF

THE EXACT ERROR OR WHAT I SEE
[paste the exact error here]

WHAT I DID BEFORE IT HAPPENED
[write in a few words what you did before it happened]

MOST LIKELY CAUSE
Windows and Mac/Linux mark the end of a line differently, and Git is converting between them.

DO THESE STEPS, IN THIS ORDER
1. Explain in plain words why this happens.
2. Add a .gitattributes file at the top with the line * text=auto and set git config core.autocrlf appropriately for my system (ask me which one I use).
3. Show me git diff --stat again to confirm only real changes remain.
Stop and tell me if what you see does not match a step. Do not skip ahead.

CHECK THAT IT WORKED
- The warnings stop and git diff --stat lists only files I really edited.
Tell me exactly what I should see on the screen when it works.

DO NOT CHANGE
- Do not reformat or rewrite my files by hand.
- Anything I did not ask about: the design, the text, other pages, other settings or the data.
- Do not delete files, data or branches, do not reset or force-push, and do not rewrite history, unless you first show me exactly what would be lost and I say yes.
- Do not paste, print or ask me to paste a password or secret key into this chat. If one is needed, tell me which settings page of the right service to store it in.

WHEN YOU FINISH
Explain in simple words what you changed (file by file or setting by setting), why you changed it, and how I can undo it.

Paste it into Claude, ChatGPT, Gemini or Cursor, then follow what it says.

After you tried it, did it work?

Steps

Explain in plain words why this happens.
Add a .gitattributes file at the top with the line * text=auto and set git config core.autocrlf appropriately for my system (ask me which one I use).
Show me git diff --stat again to confirm only real changes remain.

Do not do this

Do not ignore the problem if it makes every commit huge.
Do not reformat or rewrite my files by hand.

Word Git

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