What is the ideal keyword density?

There is no ideal percentage. Google rewards relevance, not ratios. This tool flags potential stuffing (e.g., density above ~3–4% on a single term) but never prescribes a magic number. Aim for natural usage with related terms and synonyms.

How is density calculated?

Density = (term count / total non-stop-word tokens) × 100. For n-grams, the denominator is total n-gram slots. We use Intl.Segmenter where available (CJK-friendly) and fall back to whitespace tokenization.

What extras does this tool include?

Extras: (1) 1/2/3-gram frequency tables with count + density %, (2) Stop-word toggle + language presets (en/es/fr/de/it), (3) Porter stemmer toggle for grouping inflections, (4) Position weighting (title/H1/H2/body/anchor), (5) HTML element breakdown, (6) Over-optimization flags, (7) Reading-level (Flesch) + word/char count, (8) Highlight occurrences in source text, (9) CSV export, (10) CJK/Thai support via Intl.Segmenter, (11) HTML entity decoding, (12) Stop-word editor, (13) Sortable tables, (14) Sample comparison.

Does the tool fetch URLs?

No. Paste text or HTML only — no network. We strip HTML server-side-free using DOMParser-free regex; everything runs locally.

SEO Runs in your browser

Keyword Density Analyzer

Analyze pasted text or HTML for word and n-gram (1/2/3-word) frequency and density, with configurable stop-word lists, stemming, position weighting (title/H1/H2/body/anchor), and over-optimization flags — not magic % targets. 100% client-side.

100% Private Works Offline Instant

Paste text or HTML

Language

Stuffing threshold (%)

Custom stop words (comma)

StemmingStop-words off

Built-in stop words for en: a, an, the, and, or, but, if, then, else, for, to, of…

⚠️ "running" density 12.94% is very high — likely keyword stuffing. Consider using synonyms or related terms.

⚠️ 6 terms exceed 60% of the stuffing threshold — content may read unnaturally. Aim for natural variation.

⚠️ Top term "running" appears in >5% of tokens — check for over-repetition.

Words: 119Unique: 50Chars: 729Flesch: 76Read time: 1 min

Unigrams (1-word)

Term	Count	Density	Flag
running	11	12.94%	●
shoes	8	9.41%	●
best	6	7.06%	●
runners	4	4.71%	●
trail	3	3.53%	●
example	3	3.53%	●
2026	2	2.35%	●
miles	2	2.35%	●
each	2	2.35%	●
road	2	2.35%	●
shoe	2	2.35%	●
race	2	2.35%	●
reviews	1	1.18%	●
buying	1	1.18%	●
guide	1	1.18%	●
tested	1	1.18%	●
47	1	1.18%	●
200	1	1.18%	●
racers	1	1.18%	●
team	1	1.18%	●
evaluated	1	1.18%	●
cushioning	1	1.18%	●
weight	1	1.18%	●
durability	1	1.18%	●
price	1	1.18%	●

Bigrams (2-word)

Term	Count	Density	Flag
running shoes	8	9.52%	●
best running	6	7.14%	●
road runners	2	2.38%	●
trail runners	2	2.38%	●
running shoe	2	2.38%	●
shoes 2026	1	1.19%	●
2026 reviews	1	1.19%	●
reviews buying	1	1.19%	●
buying guide	1	1.19%	●
guide tested	1	1.19%	●
tested 47	1	1.19%	●
47 running	1	1.19%	●
shoes 200	1	1.19%	●
200 miles	1	1.19%	●
miles each	1	1.19%	●
each 2026	1	1.19%	●
2026 best	1	1.19%	●
shoes road	1	1.19%	●
runners trail	1	1.19%	●
runners racers	1	1.19%	●
racers team	1	1.19%	●
team evaluated	1	1.19%	●
evaluated each	1	1.19%	●
each running	1	1.19%	●
shoe cushioning	1	1.19%	●

Trigrams (3-word)

Term	Count	Density	Flag
best running shoes	5	6.02%	●
running shoes 2026	1	1.20%	●
shoes 2026 reviews	1	1.20%	●
2026 reviews buying	1	1.20%	●
reviews buying guide	1	1.20%	●
buying guide tested	1	1.20%	●
guide tested 47	1	1.20%	●
tested 47 running	1	1.20%	●
47 running shoes	1	1.20%	●
running shoes 200	1	1.20%	●
shoes 200 miles	1	1.20%	●
200 miles each	1	1.20%	●
miles each 2026	1	1.20%	●
each 2026 best	1	1.20%	●
2026 best running	1	1.20%	●
running shoes road	1	1.20%	●
shoes road runners	1	1.20%	●
road runners trail	1	1.20%	●
runners trail runners	1	1.20%	●
trail runners racers	1	1.20%	●
runners racers team	1	1.20%	●
racers team evaluated	1	1.20%	●
team evaluated each	1	1.20%	●
evaluated each running	1	1.20%	●
each running shoe	1	1.20%	●

Honest note: there is no ideal keyword density. Google rewards relevance, not ratios. This tool flags stuffing, it doesn't prescribe a magic %. 100% client-side, no URL fetch, no upload.

How to use

Enter your input in the tool above.
Adjust any options to your preference.
Use the Copy or Download buttons to save the result.
Everything happens locally — your data never leaves your browser.

All tools