Format a Multi-line String
Tidy a multi-line string: trim lines and collapse blank runs. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Format a Multi-line String
- 1. Paste the multi-line text. Enter the text you want tidied up into the input pane, such as a document with trailing spaces or unwanted extra blank lines.
- 2. Choose which cleanups to apply. Turn on Trim trailing spaces on each line to remove invisible whitespace at line ends, and Collapse repeated blank lines to reduce multiple consecutive blank lines to just one.
- 3. Copy the tidied text. Copy the cleaned-up result and paste it wherever the neatly formatted version of the multi-line text is needed.
When to use Format a Multi-line String
Format a Multi-line String tidies a block of text by trimming trailing spaces and collapsing runs of blank lines. It cleans up the small formatting inconsistencies that accumulate from copying, editing, and merging text.
- Cleaning up text pasted from a word processor. A document copied from a word processor into a plain-text editor carries invisible trailing spaces on many lines and awkward extra blank lines between paragraphs.
- Tidying a config file before committing it. A configuration file accumulated trailing whitespace and extra blank lines over several edits, and cleaning it up first avoids a noisy whitespace-only diff in the commit.
- Normalizing spacing after merging two text sources. You combined text from two different files and the result has inconsistent blank line spacing between sections; collapsing repeated blanks makes it read more evenly.
- Preparing text for a strict formatter or linter. A tool downstream flags trailing whitespace or excessive blank lines as style violations, and running the draft through this first clears those issues before the real check.
Examples
Tidy up
Input
a b
Output
a b
About the Format a Multi-line String tool
Format a Multi-line String runs as plain JavaScript in your browser tab, with no server behind it. Tidy a multi-line string: trim lines and collapse blank runs. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's String Tools section, 159 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 2 settings, including Trim trailing spaces on each line and Collapse repeated blank lines, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Format a Multi-line String free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.