Mixed Line Endings

How to use

1. Load the source

   Select a file for exact diagnosis or paste text for a quick check.

2. Review positions

   Compare ending types, line numbers, UTF-16 offsets, and file byte offsets.

3. Save the required form

   Copy or download the LF or CRLF version required by the destination.

Scope of the result

Non-UTF-8 encodings without a BOM, such as Shift_JIS, and editor-specific save transformations are outside the scope. The original file is never overwritten.

Frequently asked questions

Why did pasted CRLF become zero?

Browsers and operating systems may normalize pasted line breaks to LF before the page receives them. Select the original file to inspect bytes.

Can the corrected file stay UTF-16?

The initial version outputs corrections as UTF-8. Diagnosis still preserves byte offsets from BOM-marked UTF-16LE/BE input.

Is the file uploaded?

No. The File API reads it only inside your browser.