Editing AI Output Until It Sounds Human

I can tell when something was written by AI and never touched by a human. So can you. So can everyone you're writing for, whether they can name why or not.

It's not one thing. It's a cluster of small habits AI models fall into by default: sentences that all run the same length, hedge words stacked on top of each other, transitions that sound like a corporate memo. None of it is wrong, exactly. It's just uniform in a way real human writing never is.

The fix isn't 'don't use AI to write.' The fix is a short, repeatable editing pass that catches the patterns before anyone else sees them. I run this pass on client emails, social captions, blog posts, everything that leaves my desk with AI in the first draft. It takes about 10 minutes once you know what you're hunting for, and Grammarly does real work at the very end of it, not the start.

Why AI writing sounds like AI writing

Before you can edit the patterns out, you need to be able to spot them on sight. Here are the six that show up in almost every raw AI draft, regardless of which model wrote it.

• Uniform sentence length: every sentence lands around 15 to 22 words. Real human writing swings wildly: a 4-word sentence next to a 30-word one. Uniformity reads as flat even when the content is fine.
• Hedging stacked on hedging: 'it's worth noting that this could potentially help in many cases.' Three hedges in one sentence. Humans commit to a claim or drop it entirely.
• Filler transitions: 'in today's fast-paced world,' 'it's important to note,' 'when it comes to,' 'at the end of the day.' These add zero information and exist only to bridge one idea to the next.
• The rule-of-three tic: everything comes in groups of three adjectives or three examples, whether or not three is the right number. 'Fast, reliable, and efficient.' Watch for it, it's everywhere once you start looking.
• Over-explaining the obvious: the draft tells you why something matters right after telling you what it is, even when the 'why' is self-evident from context.
• The summary that restates the intro: a closing paragraph that just repeats the opening in slightly different words instead of adding a new thought, a next step, or a specific ask.

The 10-minute manual edit routine

This is the pass I run before any tool sees the draft. It's five steps, roughly two minutes each, done in order. Don't skip the order, each step catches something the next one would miss.

1. Cut the first paragraph, or at least the first sentence. AI models love a warm-up lap: 'In this piece, we'll explore...' Real writing starts at the interesting part. If you can delete the opening and the piece still makes sense, delete it.
2. Break the rhythm. Scan for three or more sentences in a row that are close to the same length. Pick one and cut it down to 5 words or less. This single move does more to kill the 'AI voice' than almost anything else on this list.
3. Kill every hedge you can live without. Search for 'may,' 'might,' 'could,' 'potentially,' 'it's possible that,' 'in many cases.' For each one, ask: do I actually believe this, or am I just afraid to commit? If you believe it, state it plainly. If you don't, cut the sentence.
4. Replace every filler transition with nothing, or with a real fact. 'It's important to note that response time matters' becomes 'Response time matters.' Or, better, becomes the actual number: 'Customers who wait more than 4 hours for a reply rarely come back.'
5. Add one thing only you know. A specific number, a real client detail (nothing fabricated, something true), a phrase you'd actually say out loud, a small opinion. AI can produce competent generic copy all day. It cannot produce your specific experience. One real detail does more for authenticity than a full rewrite.

If you want the first draft to need less of this pass, front-load the request. Use this before you even generate the draft:

Write [WHAT YOU NEED, e.g. "a 150-word Instagram caption about our new loyalty program"] for [AUDIENCE].

Rules for how it should sound:
- Vary sentence length on purpose. Include at least one sentence under 6 words.
- No hedge words: cut "may," "might," "could," "potentially," "it's worth noting."
- No filler transitions: cut "in today's world," "it's important to note," "when it comes to," "at the end of the day."
- Do not restate the opening idea in the closing line. End on something new: a specific next step, a number, or an invitation.
- Write like a person talking to one other person, not a brand addressing a crowd.

Context on voice: [2-3 WORDS, e.g. "direct, warm, a little blunt"]

Before and after: four full rewrites

Reading the patterns in isolation only gets you so far. Here's the same de-robotifying pass run on four different kinds of copy, so you can see it work end to end.

1. A social caption

2. A customer service email

3. A blog intro

4. A LinkedIn post

Where Grammarly fits, and where it doesn't

Grammarly is a good tool used at the wrong stage by almost everyone who owns it. If you run it first, before your manual pass, it will happily polish the grammar of a sentence that should have been deleted entirely. It fixes commas. It does not fix voice. Run your manual pass first, then bring Grammarly in as the final gate, not the first read.

1. Run your manual 10-minute pass first, from the section above. Do not open Grammarly until this is done. It has no opinion on whether a sentence should exist, only whether it's grammatically clean.
2. Turn on Tone Detection and check the tone reading against what you actually intended. If you wrote a direct, warm email and it reads back as 'formal' or 'diplomatic,' that's a signal a hedge or a filler transition survived your first pass. Go find it.
3. Use the Clarity score as a second sentence-length check, not a first one. Grammarly flags long, dense sentences, which is useful, but it will never tell you three short sentences in a row are too uniform. That's still your job, from step 2 of the manual pass.
4. Accept fluency and correctness suggestions freely (typos, subject-verb agreement, punctuation). These are mechanical fixes with almost no downside.
5. Treat every 'tone' and 'delivery' rewrite suggestion as optional, not a command. Grammarly's rewrite suggestions trend toward smoother, more formal, more hedged language, which is the exact direction you just spent 10 minutes editing away from. Read each one and reject anything that sounds more like a form letter than you.

If the tone reading comes back off, don't guess at the fix. Ask the model that helped you write it in the first place to diagnose the gap:

I intended this piece of writing to sound [YOUR TARGET TONE, e.g. "direct and warm, like talking to a friend"].

Grammarly's tone detector read it as [TONE GRAMMARLY REPORTED, e.g. "formal" or "diplomatic"].

Here's the draft:
[PASTE DRAFT]

Find the specific words or sentences most likely causing that mismatch. Quote each one and tell me what to change it to so it matches my intended tone. Don't rewrite the whole piece, just point to the problem spots.

A copy-paste prompt to catch what you missed

After your manual pass and your Grammarly gate, run the draft through one more check, this time asking the AI itself to hunt for the patterns you just spent 10 minutes editing out. It's much better at spotting these in someone else's draft (even its own) than it is at avoiding them while writing.

You are a ruthless editor who specializes in making AI-generated writing sound human. Review the draft below and do the following:

1. List every sentence over 25 words and suggest where to cut it in half.
2. Flag every hedge word or phrase (may, might, could, potentially, it's worth noting, in many cases) and tell me whether the sentence is stronger with it removed.
3. Flag any filler transition that adds no information (in today's world, it's important to note, when it comes to, at the end of the day).
4. Point out any paragraph where three or more sentences in a row are close to the same length.
5. Tell me if the closing paragraph just restates the opening instead of adding something new.

Do not rewrite the draft for me. Just give me the numbered list of what to fix. I'll do the editing myself.

Draft:
[PASTE YOUR EDITED DRAFT HERE]

Setting Grammarly up so this becomes automatic

You don't need the paid tier to run this workflow, but it removes friction if you're editing AI drafts daily. Here's a realistic setup, no guesswork on pricing.

• Free tier covers spelling, grammar, and basic clarity flags. Enough to run the 'final gate' step above if you're editing occasionally.
• Grammarly Pro (roughly $12 to $30/month depending on billing term) adds Tone Detection, the Clarity rewrite suggestions, and full-document tone summaries. This is the tier that makes the workflow in this guide fast, since you can see the tone reading at a glance instead of guessing.
• Set your default tone goals once, in your account or document settings, to match how you actually want to sound (direct, confident, friendly are the useful ones for most small business writing). Grammarly checks your draft against that target instead of a generic 'professional' default, which is usually the opposite of what you're trying to sound like after your manual edit pass.
• Install the browser extension so the check runs wherever you're actually pasting the draft (email, social scheduler, CMS), not just inside Grammarly's own editor. This is what makes the final gate a 30-second habit instead of a separate task you skip when you're busy.

Before you set that tone profile, get the actual voice on paper instead of guessing. This prompt builds a one-page voice reference from a handful of real examples, yours or a client's:

I'm going to paste 3 to 5 pieces of writing that represent the voice I want to sound like (mine or a client's). Read them and build a short voice profile I can reuse:

1. Sentence length pattern (short and punchy, long and flowing, mixed)
2. 5 words this voice would never use
3. 5 words or phrases this voice uses often
4. How it opens (does it warm up or start mid-thought)
5. How it closes (does it summarize, ask a question, or make a specific ask)

Writing samples:
[PASTE 3-5 REAL EXAMPLES]

The full workflow, start to finish

Here's the whole thing stitched together, the order that actually works.

1. Get your first AI draft. Don't judge it yet, that's not what it's for.
2. Read it out loud once. Note where it catches in your mouth.
3. Run the 10-minute manual pass: cut the warm-up, break the rhythm, kill the hedges, cut the filler, add one real detail.
4. Run the de-robotify audit prompt on your edited draft and fix what it flags, by hand, yourself.
5. Paste the final draft into Grammarly (or wherever your extension is running) as the last gate: accept grammar and correctness fixes, check the tone reading matches your intent, ignore full-paragraph AI rewrite suggestions.
6. Publish.

Total time for a normal-length piece, once you've run this a few times: about 12 to 15 minutes past the first AI draft. That's the whole cost of not sounding like a robot.