Stem a String
Reduce every word in a string to its Porter stem. 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 Stem a String
- 1. Paste the text. Enter a sentence or block of text into the input pane. Stem a String applies the Porter stemming algorithm to every word it finds.
- 2. Read the stemmed output. Each word is reduced to its stem form, dropping common suffixes like ing or ly, so running becomes run and quickly becomes quickli. There are no options to configure.
- 3. Copy the stemmed words. Copy the stemmed text out of the output pane for use in search indexing, text analysis, or wherever grouping related word forms together is useful.
When to use Stem a String
Stem a String reduces every word in a block of text to its Porter stem, the algorithmic root shared by related word forms. This is the classic preprocessing step search engines and text-analysis pipelines use to match run, running, and runs to the same underlying term.
- Building a simple search index. You are indexing documents for search and want a query for 'running' to also match documents containing 'run' or 'runs'. Stemming both the index and the query solves the mismatch.
- Comparing word frequency across suffix variants. A text-analysis project is counting word usage but wants 'organize', 'organizing', and 'organized' to count as one term rather than three separate entries.
- Studying the Porter algorithm for a class. You are learning natural language processing and want to see exactly how the Porter stemmer transforms a list of sample words before implementing it yourself.
- Normalizing tags before deduplication. A tagging system has accumulated near-duplicate tags like 'connect' and 'connecting' that should be treated as the same concept. Stemming both reveals the shared root.
Examples
Stem each word
Input
running quickly
Output
run quickli
About the Stem a String tool
Stem a String runs as plain JavaScript in your browser tab, with no server behind it. Reduce every word in a string to its Porter stem. 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.
There is nothing to configure. Provide the input and the result appears on its own. 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
Does Stem a String 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.