The Hemingway App — Free Prose Analysis for Authors

Ernest Hemingway didn't write the way he did by accident. The short sentences, the direct verbs, the absence of qualification and hedge — it was a deliberate philosophy about what prose should do. The Hemingway App (hemingwayapp.com) applies that philosophy as an automated analysis tool: paste your text in and it highlights, in color-coded categories, every place where your writing is longer, more passive, more adverb-heavy, or more complex than it could be.

It's free, it's instant, it requires no account, and it works in any browser. Open the page, paste your text, and the analysis appears in real time as you type or edit. For certain types of author writing — book descriptions, newsletter copy, advertising text, nonfiction — it's one of the most useful free tools available. For fiction prose, it requires more careful interpretation. This article covers both.

What the App Analyzes — The Color Code System

Hemingway highlights text in five colors, each representing a different type of readability issue:

Alongside the highlighting, the app generates a readability grade level based on the Flesch-Kincaid scale and a summary panel showing counts for each issue type. The grade level indicates the US school grade level a reader needs to comfortably understand your text — Grade 6 means accessible to most adult readers, which is appropriate for commercial fiction. Literary fiction and professional nonfiction appropriately score higher.

Where Hemingway Works Best for Authors

Book Descriptions — The Highest-Value Use Case

This is the single most valuable use of the Hemingway App for indie authors, and the one Randall recommends most consistently: run your book description through Hemingway before finalizing it.

Book descriptions are commercial copy. A reader encountering your description on Amazon or in a newsletter is making a purchase decision in seconds — often in under 10 seconds. Direct, clear, short-sentence writing converts better than complex, layered prose in that context. The same sentence structure that earns praise in a literary novel will cause a reader's eye to skip in a product description.

Hemingway's directness criteria — shorter sentences, active voice, simpler word choices, fewer adverbs — are exactly the criteria that make commercial copy more effective. Running your description through Hemingway and addressing the red and purple highlights will consistently produce a cleaner, more reader-facing description than the version you drafted without it.

Newsletter and Email Copy

Author newsletters and marketing emails benefit from the same directness principles as book descriptions. Subject lines, opening paragraphs, and calls-to-action all perform better when they're direct rather than complex. A subject line that gets red-highlighted by Hemingway is almost certainly too long. An opening paragraph with multiple passive constructions will lose readers before they reach the point.

The combination of Hemingway (polishing the copy) and ScribeCount Email (measuring the results) creates a feedback loop: you can see whether the cleaner, Hemingway-edited version of your newsletter copy produces better open rates and click-through rates than the version you wrote first. Over time, that data tells you whether the Hemingway directness standard actually resonates with your specific reader audience.

Nonfiction, Blog Posts, and How-To Content

Nonfiction authors writing instructional content, blog posts, or educational material will find Hemingway's analysis most consistently applicable. Readers of instructional content want clarity above all — they're not reading for prose artistry, they're reading to learn something. Direct sentences, active voice, and simple word choices serve that goal. The Hemingway standard was built for this kind of writing.

For nonfiction authors with substantial online content presences — blogs, articles, author resource content — Hemingway is worth running on every piece before publication. The improvement in clarity is often substantial, particularly in first drafts where complex sentence structures accumulate without the author noticing.

Advertising Copy

Amazon Ad copy, Facebook Ad copy, ARC reader recruitment text, cover reveal announcements — any short-form marketing copy benefits from Hemingway's analysis. In advertising copy, where you have 30–150 words to communicate a hook and a call to action, every word that doesn't earn its place is a word that's competing with the ones that do. Hemingway's purple highlights (complex word where a simpler one exists) and blue highlights (adverbs) are particularly useful in advertising copy — they identify the padding that dilutes the punch.

Where to Use Hemingway Cautiously — Fiction Prose

The Hemingway App is named for a writer with a very specific aesthetic. That aesthetic — short declarative sentences, active voice, minimal adverbs, direct word choices — is not the only valid aesthetic for fiction prose, and applying it uncritically to literary or stylistically distinctive fiction will flatten the voice rather than improve it.

Consider:

• A dense, layered sentence that is exactly right for a Gothic novel will get red-highlighted by Hemingway. That doesn't mean the sentence is wrong.

• Passive voice constructions are appropriate in many fiction contexts — when the agent of an action should be obscured, when the rhythm requires it, when the character's perspective would naturally frame events passively.

• Adverbs are a tool. 'He said quietly' is unnecessary if 'he murmured' does the job, but not every adverb is eliminable.

• Long sentences create rhythm. A string of short sentences creates a staccato effect that is appropriate for action sequences and wrong for contemplative passages.

The practical approach: use Hemingway's fiction prose analysis as a pattern-finding tool. If red highlights cluster in your action sequences, that's a signal your action scenes may read slowly. If passive voice is appearing throughout your narrative rather than just in dialogue where a character's voice calls for it, that's a structural pattern worth addressing. Use the highlighting to identify patterns, then apply judgment to each individual instance.

The Hemingway Editor Desktop App

A desktop version of the Hemingway App is available for Mac and Windows for a one-time purchase of approximately $19.99. It allows you to write and edit directly in the app — rather than pasting from another application — and export your work to HTML and Markdown. The highlighting updates in real time as you type.

For authors who want the analysis integrated into a drafting environment for their marketing copy and nonfiction, the desktop version is worth the one-time cost. For authors who use Scrivener, Atticus, or Word for their manuscript drafting, the free web version is sufficient — paste the section you want to analyze, review the highlights, and return to your primary drafting tool.

🔗 hemingwayapp.com

Hemingway vs. Grammarly vs. ProWritingAid

These three tools are frequently compared but serve meaningfully different purposes:

The three tools don't compete — they layer. Many authors use all three at different stages: Grammarly for live error-catching while drafting, ProWritingAid for a thorough manuscript revision pass, and Hemingway for the book description, newsletter copy, and marketing text that needs to be punchy rather than literary. Each tool analyzes different dimensions of writing quality, and none of them duplicates the others' function.

The Hemingway Standard — What It Rewards and What It Misses

Understanding what Hemingway's algorithm rewards helps you use it appropriately. It rewards:

• Short, declarative sentences — the shorter, the better in its model

• Active voice — almost always

• Common words over complex ones

• No adverbs — or as few as possible

• No hedging or qualification

What it doesn't and can't assess:

• Whether your prose is rhythmically varied — a string of short sentences scores well but reads like a machine gun

• Whether the voice is consistent and authentically yours

• Whether the complexity of a sentence is intentional and appropriate

• Whether adverbs that remain are necessary or vestigial

• Whether passive voice is used deliberately for effect

The Hemingway App is a blunt instrument that makes one dimension of prose visible. It's not a substitute for an editor, for ProWritingAid's pattern analysis, or for your own craft judgment. But for making overly complex prose visible quickly — and especially for making marketing copy direct — it does the job faster and at lower cost than anything else available.

ScribeCount Author OS — Hemingway and ScribeCount Email

Hemingway improves the quality of your book descriptions and newsletter copy. ScribeCount Email — the Author OS's integrated email marketing module — is where that polished copy meets your readers and its performance gets measured.

The feedback loop works like this: write your newsletter copy, run the subject line and opening paragraph through Hemingway and address the highlights, send through ScribeCount Email, and review the open rate and click-through data in your campaign analytics. Over multiple newsletters, you build a picture of whether Hemingway-edited copy consistently outperforms your first-draft copy with your specific audience.

The same principle extends to your Amazon book description, which you can A/B test through Amazon's own tooling. Run both your original description and your Hemingway-edited version and compare conversion rates. The data is more reliable than any stylistic opinion about which version reads better.

Practical Workflow for Authors

The most efficient way to incorporate the Hemingway App into your publishing workflow:

• Book description: write your draft, paste into hemingwayapp.com, address red highlights first (split or restructure dense sentences), then purple (simplify complex words), then blue (cut or strengthen adverbs). Aim for Grade 6–8 for commercial fiction descriptions.

• Newsletter copy: paste your draft email into Hemingway, focus on the subject line and first paragraph. These are read before the reader decides whether to continue — they need to be direct.

• Ad copy: paste your 30–150 word ad into Hemingway. If anything is highlighted red, the sentence is almost certainly too long for an ad. Purple and blue highlights in ad copy almost always indicate words worth cutting entirely.

• Nonfiction chapters: paste sections into Hemingway as a pattern check. Clusters of red highlights in the same section indicate a structural density problem worth addressing before the editor sees it.

• Fiction prose (optional): use as a pattern-finding pass only. Address clusters of similar issues where they appear; exercise judgment on individual highlights.

Conclusion

The Hemingway App is free, instant, and requires nothing except a browser and text to paste. Its limitations are real — it applies one stylistic philosophy to prose that may be intentionally built on a different one — but within those limitations it does what it does very well: makes dense, passive, adverb-heavy prose visible so you can decide what to do with it.

For indie authors, the highest-value use is not the manuscript — it's everything around the manuscript. The book description that has to convert browsers into buyers in 10 seconds. The newsletter subject line that has to earn an open. The ad copy that has to communicate a hook in 30 words. These are the places where Hemingway's directness standard is not just appropriate but actually the right goal.

Run your marketing copy through it before every launch. Track whether the Hemingway-edited versions of your descriptions and newsletters perform better in ScribeCount Email's analytics. The answer, for most commercial fiction authors and their audiences, is yes.

— Randall