If your writing happens in Gmail, Google Docs, LinkedIn, ChatGPT, or any of the dozen webpage editors a busy day cycles through, the AI rewriter has to live in the browser, not in a separate tab. The TextSight Chrome extension puts a one-click rewrite action on selected text in most editors on the web. Pick a mode in the popup (Light, Balanced, Maximum), click Rewrite, and the rewrite replaces your selection or copies to clipboard. Same model, same three modes, same Authenticity Score as the web app. The extension is the interface; the backend is identical to what powers app.textsight.ai.
A web AI rewriter is fine for one paste. It stops being fine when you are cycling between Gmail, Docs, LinkedIn, and a chat window a hundred times a day.
The friction in a paste-and-copy AI rewriter is not the rewrite itself. It is the tab switch, the manual copy, the visual reorientation to a different app, and the paste back. The extension removes those steps. Select a sentence in Gmail, click the toolbar icon, choose a mode, and the rewrite drops into the compose box. The flow is the same whether you are drafting an email, a LinkedIn post, or a ChatGPT prompt.
Writers who rewrite a handful of paragraphs across an afternoon care less about model quality (every AI rewriter is converging there) and more about how cheap each rewrite is to invoke. The extension makes a single authenticity a three-second action: highlight, click, mode, done. Over a 50-rewrite session that is meaningful time saved compared to bouncing into a separate tab each time.
The extension is not a separate product. It uses your existing TextSight account, the same monthly word quota, the same Authenticity Score logic, and the same AI rewriter endpoint as the web app. Sign in once, the extension stays signed in, and your usage from the toolbar counts against the same monthly bucket as a paste-flow rewrite. No second subscription, no extension-only credits, no quota fragmentation.
Most standard text inputs accept in-place rewrites. A handful of apps with custom editors fall back to a popup workflow. Honest list, both columns.
Gmail compose, reply, and forward. Standard contenteditable, the extension writes the rewrite directly back into the message body. Works in the main composer and the small reply window.
LinkedIn post composer and direct messages. Both surfaces use a standard editor. The extension rewrites selected text in posts, articles, comments, and the messaging panel.
Twitter/X compose. Tweet composer, reply composer, and the DM box all accept in-place rewrites. Short-form copy is where the Light mode gets the most use.
ChatGPT, Claude, and Gemini chat boxes. Rewrite a prompt before sending it, or rewrite a draft response you are about to copy out of the chat. The extension treats the chat input as a standard textarea.
Substack, Medium, and most blog editors. Long-form drafts where Balanced and Maximum modes do their best work. Selection-based rewrites slot into the editor without reformatting.
Generic webpage textareas and contenteditable fields. Comment boxes, ticket trackers, CRM note fields, and most form inputs. If you can select the text, the extension can rewrite it.
Google Docs. The Docs editor uses an iframe-based contenteditable that ignores extension-driven writes. The extension drops into popup mode: select text on the page, click the icon, copy the rewrite back. The tab switch is still removed, just not the paste.
Notion blocks and Notion-style SPAs. Block-based editors with custom keyboard handling do not accept scripted text replacement. Same popup fallback applies.
ATS systems and sanitised editors. Workday, Lever, and similar single-page apps strip formatting and reject scripted writes. The popup workflow covers those surfaces honestly without pretending in-place rewrite works everywhere.
No extension-only tier, no extension-only credits. Your TextSight account quota applies. Yearly billing saves 25% on every paid tier.
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Yearly billing saves 25%. View full pricing →
A standard Chrome extension install. About 30 seconds end to end. No build flags, no developer mode, no unpacked-extension warnings.
Open the TextSight listing on the Chrome Web Store and click Add to Chrome. The browser prompts you to confirm the permissions: read and modify selected text on pages where you trigger a rewrite action, plus clipboard access for the copy-back fallback. Confirm and the extension installs in a few seconds.
Click the puzzle-piece icon in the Chrome toolbar to open the extension menu. Find TextSight in the list and click the pin icon next to it. Pinning keeps the extension icon visible in the toolbar so you can click it without opening the puzzle-piece menu every time. Most users want this on; the extension still works unpinned but the trigger is one extra click.
Click the TextSight icon and sign in with the same email you use on app.textsight.ai. The extension stores an authentication token locally and stays signed in until you sign out manually or the token expires (typically 30 days). One sign-in per browser profile covers every site you use the extension on.
Open Gmail, LinkedIn, ChatGPT, Substack, or any editor on the web. Highlight the sentence or paragraph you want to rewrite. The extension does not act on its own; it only ever sees text you explicitly select and submit through the popup or the right-click menu.
Click the toolbar icon (or right-click and choose Rewrite with TextSight). The popup shows your selected text, the mode toggle (Light, Balanced, Maximum), and a Rewrite button. Pick a mode, click Rewrite, and the rewrite appears with the Authenticity Score. Hit Replace selection to swap it into the editor in-place, or Copy if the host editor is in the popup-fallback list above.
The mode toggle lives in the popup, not in extension settings. Switching is one click per rewrite so you can match each piece of writing to the right level of reshape.
Closest to the original. Keeps sentence structure, only shifts vocabulary and rhythm enough to break the AI signature. Right for technical writing, citations, and voice-sensitive work where exact meaning has to survive the rewrite. A LinkedIn post quoting a manager, a customer email with specific names and dates, a paragraph with technical terms; Light protects those.
The default and the right mode for most everyday writing. Moderate sentence rewrites, varied rhythm, mixed sentence lengths. Use it on blog drafts, marketing copy, internal documents, and anything where the goal is human-feeling prose without preserving every original phrase. About 80% of extension rewrites land here.
The most aggressive reshape. Rhythm and word choice change heavily; sentences merge or split; vocabulary tier drops a notch. Right when the source AI signature is loud and the target is a flat, low-AI-probability output. Pair it with a Light pass on voice-sensitive work first so you do not flatten the writer's distinctive phrasing in the process.
Browser extensions with broad permissions are a real category of risk. This is the honest list of what TextSight requests, what it uses, and what it ignores.
The extension does not read pages passively. It does not scan form fields, email bodies, or chat history in the background. The only text that ever leaves your browser is text you explicitly selected and submitted by clicking Rewrite. Close the popup without clicking Rewrite and nothing leaves the device.
The extension does not inject tracking pixels, third-party analytics scripts, or fingerprinting code into sites you visit. The only outbound network call the extension makes is to the TextSight AI rewriter endpoint on api.textsight.ai when you trigger a rewrite action. That call carries the selected text, the chosen mode, and your authentication token; nothing else.
The extension is governed by the privacy policy at www.textsight.ai/privacy.html. Text submitted through the extension is processed for the rewrite, billed against your monthly word quota, and not retained beyond the standard logging window applied to web app submissions. Sign-out clears the authentication token and the locally cached preferences (mode default, last-used setting).
The main AI rewriter landing page covering modes, Authenticity Score, and the web-app paste flow.
Open AI rewriter →REST endpoint for the same AI rewriter the extension calls. Same model, scriptable from any language.
Read the API page →Umbrella AI rewriter guide covering source models, mode selection, and detector behaviour.
Open the guide →Full tier breakdown for Free, Starter, Pro, and Business. Annual billing saves 25%.
See pricing →Same AI rewriter, same three modes, same Authenticity Score as the web app. One click on selected text inside Gmail, Docs, LinkedIn, ChatGPT, and most editors across the web. Install in 30 seconds.