Hemingway Editor

Free tier

Make your writing bold and clear — AI-powered editing for faster, better prose

Free tier available·All audiences

Key strengths

Readability scoring and grade-level analysisReal-time highlighting of complex sentences and passive voiceAI-powered grammar checking and proofreadingTone adjustment via AI (Hemingway Editor Plus)Free online tools including paraphraser and readability checker

Free tier + paid plans

US

Founded 2013

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Technical Details & Integration

Hemingway Editor Classic runs entirely in the browser and does not require authentication or an API key. The readability analysis is based on the Automated Readability Index (ARI) and related heuristics applied to sentence length, word complexity, voice, and adverb usage.

Hemingway Editor Plus adds server-side AI processing for:

Grammar correction — Inline fixes with one-click acceptance
Tone adjustment — Rewrite suggestions that shift the register of selected text
AI Proofreading — Comprehensive pass over the full document

Available Free Tools (no login required):

hemingwayapp.com/grammar-checker — Free online grammar checker
hemingwayapp.com/paraphrasing-tool — Free online paraphrasing tool
hemingwayapp.com/proofreader — Free online AI proofreader
hemingwayapp.com/readability-checker — Free online readability checker

Note: No public REST API or developer SDK is currently available. The tool is designed for direct browser use only.

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