Is the keywords generator free? What are the limits?

Free with a ProofreaderPro account: 2 runs a day, up to 250 words of input each, returning 8 to 12 candidate keywords. Each run calls a language model on our servers, so the account requirement and daily cap keep it free. Paid plans share a pool of 50 runs a day across all the AI checker and generator tools on this site.

What happens to my abstract when I generate keywords?

Your text is sent to our server and used once to produce the keywords. A daily usage count is recorded against your account, which is how the daily limits work.

What input works best?

Your finished abstract, because it names the topic, method, population and findings in your field's own vocabulary, which is the raw material for keywords. A summary works if the abstract is not written yet; just make sure it names the method and the population, since those produce the most search-valuable terms and cannot be inferred if omitted.

Why do the keywords mix broad and specific terms?

Because searchers arrive at different levels. One person searches the broad field, another the exact method, a third the population. A keyword set that covers only one level is invisible to the other two searches. The generator deliberately mixes the broader field, the specific topic, the method or design, and the population or setting, and the chips make each level easy to keep or drop.

Free Keywords Generator for Research Papers

Generate journal submission keywords from your abstract. Paste it and get 8 to 12 candidates spanning the broader field, your specific topic, the method and the population, in your field's standard terminology, so you pick the strongest set for your target journal's limit.

Paste your abstract or summary

Paste or type your text, then run the tool. Results appear below in seconds.

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How to generate keywords in three steps

01

Paste your abstract

The abstract already holds your paper's vocabulary: topic, method, population, findings. That is exactly the raw material keywords are distilled from.

02

Review the candidate set

8 to 12 terms across four levels: broader field, specific topic, method or design, and population or setting. Each chip is one keep-or-drop decision.

03

Select for your journal

Cut duplicates of your title words, check your field's controlled vocabulary where one exists, and keep the strongest terms up to your journal's stated limit, usually 4 to 8.

Why researchers use this keywords generator

Four levels of search

Broad field, specific topic, method and population terms in every set, because searchers arrive at all four levels and a one-level keyword set is invisible to three of them.

Database-grade terms

The standard term of art where your field has one, which is what indexers map and searchers type, rather than novel phrasings no one queries.

Candidates, not padding

More options than any journal allows, deliberately, so your submitted set is a selection of the strongest rather than a stretch to fill a quota.

From your abstract only

Every term is grounded in what your paper actually covers. No aspirational keywords for topics the paper does not address; editors and reviewers notice.

Keywords are the cheapest discoverability your paper will ever get

Academic search is unforgiving in a specific way: it matches words, not meanings. A paper about physician burnout is invisible to a search for "clinician wellbeing" unless some indexed field carries those words. Title and abstract cover the vocabulary you happened to write; the keywords field exists to cover the vocabulary you did not, the synonyms, the adjacent terms, the broader category. That is why the standard advice is complement, not repeat.

Keywords also work inside the journal before the paper is ever public: editorial systems use them to shortlist peer reviewers and route submissions to handling editors. A vague keyword set can literally send your manuscript to the wrong reviewer pool, an outcome far more costly than a missed search. The double duty is worth the five minutes: a set that names your field, topic, method and population serves both the searcher and the editor.

Keywords are one leg of the discoverability tripod. The title generator builds the headline searchers click, and the abstract generator drafts the summary databases index; the three should divide the searchable vocabulary between them rather than repeat it. If your venue also wants a general-audience version, the plain language summary generator covers the fourth audience: readers outside the field entirely.

Discoverability gets readers to the paper; the paper itself keeps them. The ProofreaderPro editor proofreads the complete manuscript with tracked changes you approve line by line, so what they find is worth the search.

Example: from abstract to journal-ready keywords

The generator mixes your field, topic, method and setting into terms databases actually index.

You paste

An abstract about microplastic contamination in freshwater lakes: sediment sampling at 18 sites, polymer identification by spectroscopy, and implications for water policy.

You get back

microplastics, freshwater lakes, sediment sampling, polymer identification, spectroscopy, water quality, environmental policy, contamination monitoring

The mix is deliberate: topic terms (microplastics, freshwater lakes), method terms (sediment sampling, spectroscopy) and application terms (environmental policy, water quality) each catch a different search route into the paper. Most journals ask for four to eight, so keep the ones your title and abstract do not already contain; repeating a title word wastes the slot.

Keywords generator FAQs

Why do journal keywords matter?

Keywords are one of the fields academic databases and journal platforms match searches against, alongside the title and abstract. They are also used to route your manuscript to appropriate peer reviewers and to place your paper in subject collections. Weak keywords cost discoverability twice: searchers do not find the paper, and editors work harder to find it reviewers. For five minutes of effort at submission, few fields repay attention this well.

How many keywords should a research paper have?

Most journals ask for between 4 and 8; some allow up to 10, and the author guidelines state the number. This generator returns 8 to 12 candidates deliberately, so you select the strongest set for your target's limit rather than padding to reach it. Selection beats generation here: the right 5 keywords outperform a permissive 12.

Should keywords repeat the words in my title?

The standard advice is to complement the title rather than duplicate it, since the title is already indexed; keywords spent repeating it are search terms wasted. Good keyword sets cover the synonyms and adjacent terms searchers actually use: the alternative name of your method, the broader field, the population. This tool works from your abstract and does not see your title, so cut any generated keyword that duplicates a title word and keep the coverage.

What about controlled vocabularies like MeSH?

Some fields index against controlled vocabularies: MeSH in medicine, PsycINFO terms in psychology, JEL codes in economics. Where your field has one, check your generated keywords against it, because a term from the controlled list is guaranteed to be a term searchers and indexers use. The generator prefers each field's standard terms of art, which usually lands on or near the controlled term, but the authoritative list is worth the lookup for submission.

Keywords set. Now perfect the paper they point to.

The ProofreaderPro editor proofreads your complete manuscript with tracked changes you accept or reject line by line: grammar, punctuation, academic register and consistency. Free to try.

Proofread my manuscript

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