TextSight is the entire product as a URL. No desktop app, no Windows installer, no Mac DMG, no mandatory Chrome extension. Open app.textsight.ai in Chrome, Safari, Edge, Firefox, or any modern browser and the result panel loads in about ten seconds. The same URL works on a laptop, phone, tablet, library terminal, classroom Chromebook, or office workstation locked down by IT. Sign in once and your scan history syncs across every device. The free tier covers 3 scans a day at 5,000 characters per scan, with sentence-level highlights and an Authenticity Score in the same panel.
Three patterns dominate the category in 2026. Where each tool sits decides whether it actually works on your computer.
TextSight, ZeroGPT, GPTZero, Quillbot, and most modern detectors all fit here. The whole product is a URL. No install, no extension, no download. You open the page, paste your text, and the server runs the classifier and sends results back. This is what "online" should mean in 2026, and it is the pattern TextSight is built around.
TextSight and a handful of competitors offer a Chrome extension as a convenience layer on top of the web app. The extension is not required. The detection itself still runs on the web. If you can install Chrome extensions, the extension is faster for one-off paragraphs; if you cannot (school Chromebooks, locked-down work laptops, library PCs), the web app keeps working with no feature loss.
A small number of older detection vendors still ship a Windows or Mac app for "offline" scanning. In practice the app still talks to a remote API for the classifier, so the install adds friction without much benefit. None of the major 2026 detectors require this, and TextSight has never shipped one.
Firmly in Pattern 1 with an optional Pattern 2 extension. Nothing about the core workflow needs anything installed. If your device has a browser and an internet connection, you have the detector. That is the entire promise of "online" for this category, and the rest of the page is how TextSight delivers on it.
Because the detector is a web app, the operating system underneath does not matter. Chrome on Windows behaves the same as Safari on iPad behaves the same as Firefox on a Linux laptop.
Chrome, Safari, Edge, Firefox, Brave, Opera, and Vivaldi are all supported on macOS, Windows, and Linux. The minimum required version is roughly anything released from 2024 onward. Older browsers like Internet Explorer 11 or Safari 13 are not supported because the result panel uses modern CSS and DOM features that older engines cannot render correctly.
iOS Safari and iPad Safari, Android Chrome, Samsung Internet, and Firefox for Android all render the responsive UI. Paste, scan, and the sentence colour map work on a 6-inch screen without horizontal scrolling or pinch-zoom. No App Store or Play Store download is required because there is no native app to install. The browser is the product on mobile too.
Library terminals, school computer labs, classroom Chromebooks, hotel business centres, and corporate workstations all work as long as the browser can reach app.textsight.ai. Some restrictive IT environments block the domain by category; in that case ask IT to allowlist it, or scan from a phone over mobile data. The detector itself does not need any local privilege.
Sign in once on any browser and the scan history syncs to every other browser and device on the same account. A scan started on a phone shows up on the laptop without an export step. Free users get the sync; paid users get longer history retention. Logging out clears local session data on shared computers.
Every plan runs in the same browser tab against the same classifier. Paid tiers raise daily caps, per-scan limits, and unlock file upload, API access, and team seats. Full details on the pricing page.
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 →
Four steps from open-tab to verified result. No installer prompt, no extension banner, no app store redirect, identical on every device.
Chrome, Safari, Edge, Firefox, Brave; on a laptop, phone, or tablet. There is no "right" browser. Visit app.textsight.ai. The text input field appears immediately, no popups, no signup wall. If you are on a shared or library computer, you can skip signin entirely and run the scan as an anonymous user.
Up to 5,000 characters on the free tier, about 800 words. A character counter ticks as you paste. Longer pieces split into sections, scanned one at a time within the daily three-scan budget. Pro raises the per-scan cap to 10,000 chars and unlocks file upload for PDF, DOCX, and TXT so dissertation chapters and long-form articles do not need to be chunked by hand.
The classifier runs on TextSight's servers in about ten seconds for an 800-word piece. The result panel shows an overall AI versus human score, the 0 to 100 Authenticity Score, the Plagiarism Risk read, and a sentence-level colour map. Green reads human, yellow reads borderline, red reads ChatGPT. The top three signals that fired on the passage are listed alongside.
Nothing is written to local disk. On a shared device, log out first if you signed in. The next user opens the same URL and starts fresh with their own scan budget. On your own device, leave the tab open or pin it; the next scan is one paste away.
Browser-only is not a limitation. It is the right answer for these four overlapping workflows.
The library Mac at a state university or the back-row PC in a high-school computer lab almost never allows software installs. The browser is the only option. No account is required for a first scan, so a student can verify an essay on a public terminal and walk away without leaving credentials behind. Logging out at the end of the session clears the rest.
A freelancer drafting on the train, a journalist filing from a hotel, a student writing on a Pixel because the laptop is at home. The responsive UI handles paste, scan, and the sentence colour map on a 6-inch screen. iOS Safari and Android Chrome both render the result panel correctly without pinch-zoom or horizontal scrolling.
Corporate IT departments often block app installs and Chrome extensions but leave general web browsing open. Marketing, comms, and PR teams use the online detector to verify outsourced copy without filing an IT ticket. The work happens entirely in the browser tab; no admin password, no install request, no exception process.
A copywriter drafts on the desktop, edits on the iPad on the sofa, and double-checks the final version on a phone before sending. With sign-in, the scan history appears on every device automatically. There is no export step, no email-to-self, no AirDrop dance. The same account is the single source of truth across devices.
Browser-only buys a lot of upside and costs a few things. Here is the honest accounting.
The classifier runs on TextSight's servers. If your laptop is on a plane with no Wi-Fi, the scan will not run. Queue the document and scan when you reconnect. There is no client-side fallback model because a serious AI detector needs the full model weights and current training data, which are too large to ship into a browser tab.
Slow cafe Wi-Fi will time out an 800-word scan after 60 seconds. Switch networks or wait for a stable connection before retrying. The request itself is small; only an unstable or blocked connection should cause a timeout. The default workflow assumes broadband or 4G at minimum.
The mobile experience is the responsive web app, not a store install. That keeps things lightweight and means the same URL works everywhere. The trade-off is no push notifications and no default home-screen icon. You can save the web app to your home screen on iOS and Android for a one-tap launcher.
3 scans per day, 5,000 chars per scan. Heavy users on a single device hit the cap quickly. Starter at $7.49 effective on annual lifts the cap to 20 scans per day. Pro at $14.99 effective on annual makes detector scans unlimited and raises the per-scan cap to 10,000 chars.
Some IT environments block app.textsight.ai by category. Ask IT to allowlist the domain. The browser still works on phones over mobile data as a quick workaround. If the network policy is strict enough to block the domain entirely, a desktop installer would not get past it either; this is a network rule, not a browser limitation.
The main ChatGPT detector landing page with the paid feature set and the full classifier write-up.
Open ChatGPT detector →The free tier scoped page: 3 scans a day, no signup, five ChatGPT-specific signals scored together.
See the free tier →Optional convenience layer for one-click scans from any page. Not required; the web app works the same.
Add the extension →Full tier breakdown for Free, Starter, Pro, and Business. Annual billing saves 25%.
See pricing →3 scans a day, 5,000 chars per scan, sentence-level highlights, Authenticity Score and Plagiarism Risk in the same scan. Your first scan in about ten seconds.