What counts as a comment line?

Any line that begins with the selected language's line-comment marker, plus every line inside a block comment.

Which languages are supported?

Pick the comment syntax: C-style (JS, TS, Java, C, Go, Swift), hash (Python, Ruby, Shell, YAML), SQL, or HTML/XML.

Is my code uploaded anywhere?

No, the counting runs entirely in your browser.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

Do I need an account or an API key?

No. Every tool on Coders Hub is free to use with no sign-up, no API key and no usage limits.

Code Line Counter (SLOC)

Count code, comment and blank lines in any source file.

Support

Works Offline

Privacy First

No Login

No API

Comment syntax

Exclude blank lines from SLOC

Source code

Line statistics

SLOC

Code lines

Comment lines

Blank lines

Total lines

Characters

Words

Longest line

Tab-indented lines

Comment density: 33%

About the Code Line Counter (SLOC)

Paste source code and get an instant SLOC breakdown: real code lines, comment lines, blank lines, characters, words, longest line and comment density. Supports C-style, hash, SQL and HTML comment syntaxes, including multi-line block comments.

Examples

JS file

// note
const a = 1;

Output

Code 1, Comments 1

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Comments

No login needed. Comments appear after a quick review.

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Version 1.0.0 · Updated 2026-08-25 · Runs entirely in your browser