User Rating 0.0 ★★★★★

Total Usage 0 times

Category Code Utilities

⇩

Drag & Drop file here or Click to Upload

.txt, .js, .py, .html, .css (Max 10MB)

Trim Mode (Ignore whitespace-only lines)

Total Lines 0

Non-Empty Lines 0

Empty Lines 0

Input / Preview

Is this tool helpful?

Your feedback helps us improve.

★ ★ ★ ★ ★

About

Counting lines of code (LOC) or text segments is a fundamental requirement in software development, content auditing, and data processing. Precision matters when billing clients based on source code volume or strictly formatting data for legacy systems. A standard text editor often obscures the difference between a truly empty line and one containing invisible whitespace characters like tabs or spaces.

This tool processes raw text and uploaded files to distinguish between total lines, non-empty lines, and purely whitespace lines. It handles cross-platform inconsistencies regarding line breaks, specifically the difference between Windows CRLF and Unix/Linux LF standards. Visual verification ensures that hidden characters do not inflate the final count.

Formulas

The calculation defines the set of lines L derived from the input text T. The counting logic adjusts based on the presence of whitespace characters when Trim Mode is active.

{

counttotal = length(split(T, CRLF ∨ LF))countvalid = n∑i=1 (trim(li) ≠ ∅ ? 1 : 0)

Where trim removes leading and trailing whitespace W (spaces, tabs) from line li. The difference defines the empty line count.

Reference Data

Standard	Symbol	Hex Code	Operating Systems	Impact on Count
Line Feed	LF (\n)	0x0A	Linux, macOS, Unix	Standard break. Counts as 1 new line.
Carriage Return	CR (\r)	0x0D	Legacy Mac (Pre-OSX), Commodore	Often ignored or treated as overwrite in modern editors.
End of Line	CRLF (\r\n)	0x0D0A	Windows, MS-DOS	Two bytes, but logically represents one line break.
Next Line	NEL	0x85	EBCDIC Mainframes	Rare. Requires specific encoding parsers.
Line Separator	LS	0x2028	Unicode Systems	Used in specific high-level formatting protocols.
Paragraph Separator	PS	0x2029	Unicode Systems	Defines block boundaries rather than visual lines.
Null Character	NUL	0x00	Binary Files	Terminates strings in C-based languages.
Vertical Tab	VT	0x0B	Legacy Printers	Moves cursor down without carriage return.

Frequently Asked Questions

Yes. If text appears on the final line without a trailing newline character (EOF), it is still counted as a valid line. Many terminal tools incorrectly report N-1 lines in this scenario; this tool counts visually apparent lines.

Standard mode counts these as non-empty lines because they contain data (whitespace characters). If you enable "Trim Mode", the parser ignores lines consisting solely of whitespace, categorizing them as empty lines.

Browser-based parsing loads the entire file into the DOM memory. A 10MB limit ensures the browser tab does not crash or freeze during the split and render process, especially when generating the visual line preview.

Minified code (like .min.js) often resides on a single line. The counter will report 1 line regardless of the file size (e.g., 500KB). You must format or "pretty print" the code before pasting if you require a logical line count.

No. The logic relies on text-decoding algorithms (UTF-8). Uploading images or executables will result in garbage data or incorrect line counts due to the random occurrence of byte sequences resembling line breaks.