Compress a List
Compress list space. 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 Compress a List
- 1. Paste your list. Put the list into the input pane, including any stray blank lines or extra spacing around items that you want cleaned up and condensed.
- 2. Set the Separator. Choose the character to join items with in the compressed output, such as a comma. This replaces the line breaks between items in the result.
- 3. Copy the compressed list. Copy the result, with whitespace trimmed, blank lines removed, and items joined by your separator into one condensed line.
When to use Compress a List
Compress a List trims whitespace, drops blank lines, and joins every item onto a single line with a separator you choose. Reach for Compress a List whenever a sprawling, loosely formatted list needs to become a compact, single-line value.
- Turning a messy pasted list into a CSV cell value. You copied a list with inconsistent spacing and blank lines and need it as one comma-separated value for a spreadsheet cell. Compress it with a comma separator.
- Preparing a compact value for a URL parameter. A multi-line list needs to fit into a single query string value. Compress it into one line joined by commas before appending it to the URL.
- Cleaning up a list copied from a PDF or web page. Text copied from a PDF often brings extra blank lines and inconsistent spacing along with it. Compress the list to strip the mess and get a clean single line.
- Shrinking a list for a compact log entry. You want to log a list of values as a single line in a log file rather than several lines. Compress the list with your chosen separator before writing the log entry.
Examples
Compress a list
Input
apple banana cherry
Output
apple,banana,cherry
About the Compress a List tool
Compress a List does its work locally, right in the browser. Compress list space. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the List Tools collection on EditSafely, a set of 114 small, focused List utilities that share the same instant, private workspace.
You can shape the output with the Separator setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Compress a List cost anything?
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?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
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?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
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.