Cómo usar: Readability Score Checker
- Paste your text into the box — or click Sample to see how it works.
- Read the Flesch Reading Ease score and the grade levels: for most web content aim for 60+ and grade 8 or lower.
- Look at the highlights: long sentences are shaded and complex words underlined. Split long sentences and swap long words for short ones.
- Edit right in the box — the scores update as you type.
The six readability formulas
| Formula | Based on | Result |
|---|---|---|
| Flesch Reading Ease | Words per sentence, syllables per word | 0–100, higher is easier |
| Flesch–Kincaid Grade | Same inputs, scaled to US school grades | Grade level |
| Gunning Fog | Sentence length and words of 3+ syllables | Years of schooling |
| SMOG | Words of 3+ syllables per 30 sentences | Grade level (best for 30+ sentences) |
| Coleman–Liau | Letters per word and sentences per 100 words | Grade level |
| Automated Readability Index | Characters per word and words per sentence | Grade level |
Syllables are counted with English pronunciation rules (silent final “e”, “-es” and “-ed” endings, vowel groups), so the results match other readability tools closely but not always exactly. The scores are designed for English text.
Why readability matters for SEO
Search engines don’t use a readability score directly, but readers do: easy text keeps people on the page, answers their question faster and gets shared more. Most successful web pages land between grade 6 and 9. Check the length and keywords too with the Word Counter and Keyword Density Checker.
También se busca como: readability checker, readability score, flesch reading ease, flesch kincaid grade level, gunning fog index, reading level checker, smog index, text readability test.
Herramientas que combinan con: Readability Score Checker
- Contador de caracteres — Cuenta cada carácter mientras escribes —con y sin espacios, letras, números, signos de puntuación, emojis y bytes— y comprueba al instante si tu texto se ajusta a los límites de X, SMS, Google y las redes sociales.
- Convertidor de mayúsculas y minúsculas — Pega cualquier texto y conviértelo entre 11 estilos de mayúsculas y minúsculas: desde «Title Case» para titulares hasta «camelCase» y «snake_case» para código.
- SERP Preview — Write a title tag and meta description and see exactly where Google is likely to cut them off — measured in pixels, not just characters, on desktop and mobile.
- Verificador SEO y auditoría del sitio web — Pega una URL para realizar hasta 70 comprobaciones de SEO on-page, además de una auditoría completa del sitio web: velocidad de Lighthouse, encabezados de seguridad y SSL, datos estructurados, enlaces rotos, robots.txt y rastreadores de IA, aspectos básicos de accesibilidad, seguimiento y consentimiento, SPF/DKIM/DMARC y caducidad del dominio — todo ello resumido en una puntuación global del sitio web con soluciones priorizadas.