Most drafts do not need a full rewrite. They need one or two lines repaired: the sentence a scan shaded as AI, the one that runs the same length as the three around it, the one stuffed with stock vocabulary. A sentence rewriter changes exactly that line and nothing else, so the parts of your text that already sound like you stay untouched. Paste the line, pick how hard to push, splice the new version back in. You see an Authenticity Score against our own detector for the line you changed, so you know whether it still reads AI-patterned.
When a draft is mostly yours and only a few sentences read as AI, running the whole thing through a rewriter is a blunt instrument. It changes lines you were happy with to fix lines you were not. The sentence rewriter is the scalpel for that case.
A draft you wrote yourself usually has a handful of weak spots: a sentence you copied from notes, a line an assistant suggested, a clause you never quite finished. Send the whole passage to a rewriter and it touches every one of those weak spots and every strong spot too. The lines you spent time getting right come back changed, sometimes for the worse. Working one sentence at a time means the rewriter only ever sees the line you decided was a problem, and the rest of the draft survives exactly as you left it.
The hardest part of trusting any rewrite is verifying that nothing important was lost. Across a whole paragraph that is real work; across one sentence it takes seconds. You read the old line, you read the new line, you confirm the figure is still there and the claim is unchanged, and you move on. The smaller the unit, the cheaper the check, which is why line-level editing tends to produce fewer quiet errors than batch rewriting a long passage.
Detectors that grade at the sentence level make this clear: in a lot of real drafts, one or two lines carry almost all of the AI signal while the rest reads human. When that is the situation, rewriting the whole passage is solving a problem you do not have. Fix the flagged line, re-scan, and the highlight clears without disturbing anything else. The honest move is to change as little as the text actually needs.
One-click rewriting the whole passage is faster on the clock. Going line by line costs more minutes. But the trade is control: you decide which lines change, you read each replacement against the original, and you never wake up to a draft that reads smoothly but no longer says what you meant. For a piece that is mostly your own work, the extra minutes buy a cleaner result and fewer surprises.
A line gets shaded as AI for concrete reasons, not a hunch. Knowing the four most common ones tells you what the rewrite is fixing and lets you judge whether the new line actually addressed it.
The single most reliable line-level tell is a sentence that matches the length of its neighbours too closely. Human writing varies: a short line, then a long one, then something medium. AI tends to settle into one comfortable length and hold it. When a scan flags a line that is otherwise fine, uniform length is often the reason, and the fix is to rewrite it deliberately shorter or longer so it breaks the run. That single change can lift the cadence of the whole paragraph it sits in.
A line that leans on the recognisable AI word set (delve, tapestry, leverage, multifaceted, robust, navigate) reads as machine-generated even when its grammar is perfect. The rewrite swaps those for plainer words that say the same thing without the template smell. Because you are working on one line, you can see exactly which words changed and confirm the swap did not soften the meaning.
Sentences that start with Furthermore, Moreover, In addition, or Additionally are doing connective work the content should be doing on its own. AI bolts these on as cheap glue. Rewriting the line removes the crutch and rebuilds the connection from the idea itself, so the sentence leads into the next one because the thoughts relate, not because a signpost word announced it.
A line written in the hedging, over-qualified, eager-to-please tone that chat models default to stands out against your own plainer voice. The rewrite strips the throat-clearing (It is worth noting that, It is important to remember) and the reflexive hedges, leaving a sentence that states its point directly. At the line level you can decide case by case whether a hedge was load-bearing or just filler.
The mechanic of sentence-level editing is a clean swap: the rewriter hands you a replacement for one line, and you put it back exactly where the old line was. Nothing around it moves. Here is what that looks like in practice.
Copy the flagged sentence on its own, or highlight it inside the passage so the tool isolates it. The rewriter returns a fresh version of that one line. It does not see, and cannot change, the sentences before and after. That is the guarantee line-level work depends on: the only thing that can possibly change in your draft is the line you handed over.
Delete the old sentence, paste the new one in the same slot, and read the join. A replacement line has to fit two seams: the sentence that comes before it and the sentence that comes after. Most of the time it fits cleanly because the meaning is the same. Occasionally the new line needs a one-word tweak at the start so the handoff reads smoothly, and because you are looking at a single seam, that tweak is obvious.
After the swap you can re-scan the single line to confirm its own highlight cleared, or re-scan the whole passage to see the paragraph in context. Checking the line tells you the local fix worked; checking the passage tells you the swap did not accidentally make a neighbour stand out by comparison. For one stubborn sentence, the line-level re-scan is faster; before you call the whole piece done, the passage re-scan is worth one pass.
A passage rewrite asks you to trust the tool with everything at once and then diff a wall of changes to find what moved. The splice-back swap inverts that: one line in, one line out, one seam to read. There is no hunting for unintended edits because there cannot be any. For a draft that is mostly yours, that bounded, auditable change is the whole appeal of working at the sentence level.
The free tier covers a real line-level workflow: paste up to 5,000 characters, use Light and Balanced, and see the Authenticity Score on every line you rewrite. Maximum and larger word quotas start on Starter.
Billed $89.88/year — Save $30
Billed $179.88/year — Save $60
Billed $359.88/year — Save $120
Yearly billing saves 25%. View full pricing →
The sentence workflow is a loop, not a single pass. You scan, fix the most-flagged line, re-scan, and repeat only as far as the highlights actually go.
Paste the full passage and click Scan. The detector grades line by line and shades the sentences that read AI-patterned. Read the highlight map before you touch anything: it tells you how many lines are actually flagged and which one carries the strongest signal. If only one or two lines light up in an otherwise clean passage, this is exactly the tool for the job.
Start with the single sentence shaded most strongly, not the first one in reading order. Isolate it: copy it out on its own, or highlight it in place so the rewriter works on that line alone. Working worst-first means each fix you make has the largest effect on the passage's overall read, and it stops you fiddling with borderline lines that the strong one was dragging down.
Light reshapes the line gently and is right for technical or cited sentences where you cannot risk the claim shifting. Balanced is the default and does the real line work: changing length, swapping stock vocabulary, removing the transition crutch. Maximum rewrites the line hardest and suits casual sentences where voice variation is welcome; read it carefully because it strays furthest from the original phrasing.
Put the replacement next to the original and check three things: the claim is the same, every figure and named source survived, and the new line is a different length from its neighbours if length was the problem. Because it is one sentence, this read takes seconds. If the new line lost a qualifier that mattered, rewrite it again or edit it by hand before you accept it.
Delete the old line, drop the new one into the same slot, and read the sentence before and after it. A replacement has to hand off cleanly on both sides. Most of the time it does; occasionally a one-word tweak at the seam makes the join read naturally. This is the only place a line-level edit can ripple, so it is the only seam you need to watch.
Scan again. If the line's highlight cleared and no neighbour now stands out by comparison, that sentence is done. Move to the next flagged line and repeat, or stop entirely if the passage is now clean. The discipline of line-level work is knowing when to stop: once the scan shows no flagged sentences, rewriting more lines only risks introducing the very patterns you just removed.
Line-level rewriting fits the moment when a piece is nearly finished and a single sentence is the only thing holding it back. That moment shows up across very different kinds of writing.
An essay that is mostly your own work but has one line you pulled from a source summary, or one sentence an assistant suggested, is the textbook case. The rest reads like you; that one line does not. Rewriting just that sentence to match your voice fixes the outlier without rewriting an essay you already wrote. Disclose any AI assistance your institution requires, and keep the argument yours.
In a finished blog post or page there is often one sentence that reads flatter or clunkier than the rest, usually the one you wrote in a hurry. Reworking that line for rhythm and a sharper phrasing lifts it to the level of its neighbours, so the paragraph reads as one voice instead of a good draft with a snag in the middle. No need to disturb the lines that were already working.
Technical writing tends to produce the occasional overloaded sentence: too many qualifiers, too long, no breathing room. A Light-mode rewrite of that single line splits or shortens it without softening the precision, while the figures and citations stay exactly as written. Because only the one line changes, the surrounding argument and its careful hedging are untouched.
When a draft is almost done and a scan flags two or three lines, the practical move is to fix those lines and leave everything else. Sentence-level work is the editing pass at the end, after the structure is settled, when you only want to repair the specific places that still read AI. Used responsibly and reviewed by you, it is the lightest-touch way to finish.
Being clear about the limits is part of using a rewrite tool responsibly. Here is what this tool does not claim to be.
No rewriter can promise that a line will clear Turnitin, GPTZero, Originality.ai, or any other tool, and TextSight does not make that promise. Those detectors disagree with each other and change their models, so a guarantee against them would be dishonest. The Authenticity Score you see here is measured against TextSight's own detector only, as a signal of how AI-patterned the sentence still reads.
Rewording a sentence does not make borrowed content yours. If the idea or the wording came from a source, cite the source; rephrasing a line does not remove the obligation to attribute. The tool is for improving the clarity and voice of writing you have the right to use, not for disguising the origin of someone else's sentence.
The goal is a line that reads in your own voice, used in writing you are entitled to submit or publish. Framing it as a way to cheat a detector or sneak AI text past a marker is the wrong use and not what the product is built for. Honest use is clarity and own-voice polish, with disclosure where it is expected.
The cadence rules, trigger-word swaps, and length logic are tuned for English; output in other languages is not guaranteed and should be treated as a rough draft. And the rewrite preserves meaning by design: it changes wording, length, and structure within a line, but it keeps the facts, figures, and citations that sentence carries rather than dropping detail to read cleaner.
When several lines read AI or the block's arrangement is the problem, rework the whole paragraph instead of one line.
Rework a block →The main rewriter page covering every source model and all three intensity modes.
Open AI Rewriter →Scan first to see which exact sentences read AI, so you know which single line to repair.
Run the detector →What the score on each rewritten line means, and why it is measured against our own detector only.
Understand the score →Scan a passage, pick the line that lit up, rewrite it, and splice it back. The sentence you changed gets an Authenticity Score against our own detector; every other line stays exactly as you wrote it. Free to start, no card.