Line Ending Final Newline Flag Tool

Description

Check for terminal CR or LF and label the ending CRLF, LF, CR, or none, prioritizing the two-character pair.

Text layout distinguishes Unicode characters, encoded bytes, and visual columns. These counts need not agree: a tab depends on its column position, while a newline is a sequence of characters with a particular spelling.

Check for terminal CR or LF and label the ending CRLF, LF, CR, or none, prioritizing the two-character pair.

When to use this tool

Use Line Ending Final Newline Flag when you need one deterministic text-layout or encoding component under the stated counting convention.

How to use the tool and how it works

Enter text. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read hasFinalNewline, ending. Inspect hasFinalNewline before interpreting the associated values.

Check for terminal CR or LF and label the ending CRLF, LF, CR, or none, prioritizing the two-character pair.^[1]

Input field	Meaning and units	Accepted input
text	Supplied text; only the transformations stated above are applied.	Required. Text; maximum UTF-16 length 8192.

Output field	Interpretation	Returned shape
hasFinalNewline	Has Final Newline	Required. Boolean.
ending	Ending	Required. Text; maximum UTF-16 length 8192.

json

{
  "input": {
    "text": "alpha\r\n"
  },
  "output": {
    "hasFinalNewline": true,
    "ending": "CRLF"
  }
}

Limitations and assumptions

Only the final ending is classified; internal or mixed line endings and text encoding are not inspected.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.

Alternative or Complementary methods

Inspect the final text in the target encoding and renderer when display width or line wrapping matters.

References

Calculation and input contract: text/line-ending-final-newline-flag — tool.io

Similar or alternative tools

Hymn Stanza Line Count
Normalize CRLF and CR to LF, split into lines, and remove one final empty split item.
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