Dechecker
Dechecker is a free-to-start AI content detector that scores text sentence by sentence, explains each flagged passage, and pairs detection with a built-in humanizer plus grammar, plagiarism and fact-checking tools inside one credit-based account.
What is Dechecker?
Dechecker is an AI content detector built around a single question: was this text written by a person or produced by a model? You paste or upload your text on the homepage, no account required, and the tool returns a verdict, an AI probability percentage, a human percentage and, most useful in practice, a sentence-by-sentence breakdown that explains why each flagged passage reads as machine-written. The publisher says the detector runs on machine learning models trained on large collections of human and AI-generated text, hunting for repetitive structures, rigid phrasing and abrupt transitions. Coverage is announced for ChatGPT, GPT-5, Claude, Gemini and LLaMa.
Detection is only the entry point. Three optional modules attach to the same analysis, namely plagiarism, grammar and a fact checker advertised as free, while a built-in humanizer picks up where the report stops. That rewriter offers Basic and Advanced modes, lets you freeze keywords, brand names or SEO terms so they survive the rewrite, strips quotation marks, stray spaces, dashes and invisible characters before it starts, generates several drafts to compare, and re-scores the result automatically at no extra credit cost.
Around this core sits a suite of 28 tools in seven families: AI checking, humanizing, homework help, summarising, essay writing, transcription and translation. Specialised detectors reach beyond prose to AI-generated code and to AI-generated or manipulated images. Files can be processed in batches, three at a time on the free plan and up to forty on Premium, detection reports export to PDF from the first paid tier, and a personal library keeps past results once you are logged in.
The economics are credit-based and shared across every tool in the account: guests get five uses a day, and signing in adds 80 monthly credits. The interface runs in seven languages, and detection is announced for English, Spanish, French and more. The site claims over one million users and a low false-positive rate, though it publishes no measured accuracy figure. It remains a young service, its domain having been registered in September 2025.
What it does
- Detect AI-generated text sentence by sentence, with a probability score and an explanation for every flagged passage
- Rewrite flagged passages with the built-in humanizer and re-check the score automatically
- Run grammar, plagiarism and fact-checking passes on the same text
- Scan documents in bulk, from 3 files on the free plan to 40 on Premium
- Export a detection report as a PDF and keep past results in a personal library
- Transcribe audio files, video files and live lectures into text
- Summarise YouTube videos, PDFs and long text, and translate PDFs and images
When to use Dechecker / When not to
A quick filter to help you decide if Dechecker is the right fit.
When to use Dechecker
- Students and researchers checking essays, dissertations or literature reviews before they hand them in
- Teachers and lecturers marking in batches, where bulk scanning handles 3 to 40 files in one run
- Bloggers and SEO writers who need AI-sounding drafts rewritten without losing their target keywords
- Freelance writers verifying originality before delivering a piece to a client
- Occasional users who want a capable detector without committing to a subscription, since guests get five checks a day
When not to use Dechecker
- Schools, universities and companies with a procurement process, since no legal entity, postal address or company registration is published anywhere on the site
- Anyone needing programmatic access, as there is no public API and no developer documentation
- Data protection officers and legal teams, given the absence of a DPA, a subprocessor list, any retention period and any mention of the GDPR
- Teams wanting shared seats, because pricing is per individual account and the Premium fair-use rules explicitly forbid account sharing
- Users who need a contractually guaranteed accuracy rate, which the site never publishes as a measured figure
How to use Dechecker
A typical end-to-end flow, from setup to results.
- Open the homepage, where the AI checker is available immediately without an account
- Paste your text, upload a document, or start a bulk scan of several files at once
- Or load one of the preset examples labelled ChatGPT, Claude, Gemini and Human to see how scoring behaves
- Tick the optional add-ons you want alongside detection: plagiarism scan, grammar review or fact check
- Run the analysis and read the verdict, the AI percentage and the human percentage
- Work through the sentence-level breakdown, where each flagged passage comes with an explanation
- Send the flagged text to the humanizer, freeze the keywords you must keep, and pick Basic or Advanced mode
- Compare the generated drafts, edit any of them by hand, and let the tool re-score the result
- Export the detection report as a PDF from the Basic tier upwards, and sign in to keep it in your library
- Manage or cancel the subscription from Account Settings, then My Subscription, or Profile then My Plan
Pros & Cons
Pros
- Usable straight away with no account and no card, guests getting five checks a day
- Permanent free plan of 80 monthly credits, raised to 100 in the first month
- Very low paid entry point at 3 USD per month at the time of review
- Sentence-level results with an explanation, rather than a single opaque percentage
- Detection and rewriting in one flow, with the score recalculated automatically
- Keyword freezing protects SEO terms and brand names through the rewrite
- 28 tools share one credit balance, and the interface runs in seven languages
Cons
- No legal entity, postal address or company registration is published anywhere on the site
- Support runs through a Gmail address rather than one on the tool's own domain
- No mention of the GDPR at all, and a privacy policy anchored to a directive repealed in 2018
- No retention period, no deletion procedure, no DPA and no subprocessor list
- Nothing published on whether submitted content is used to train models
- No API and no developer documentation, so the tool cannot be wired into another system
- Internal contradictions on refunds, on the claim of being free, and on whether text is stored
Pricing & Plans
A permanent free plan is available, requiring no payment card and granting 80 credits per month, raised to 100 in the first month, with unregistered guests limited to five uses per day. The lowest paid entry point is the Basic plan at 3 USD per month, advertised as a 40% reduction on a 5 USD list price. Pro is offered at 9 USD per month and Premium at 29 USD per month, both likewise displayed as reduced prices. All billing observed is monthly, and credits do not carry over between cycles.
- 80 credits per month plus a 20-credit first-month bonus
- up to 8
- 000 AI Checker words and 4
- 000 Humanizer words per month
- 1
- 500 words per check
- 600 words per rewrite
- batches of 3 files
- 400 credits per month
- up to 40
- 000 AI Checker words and 20
- 000 Humanizer words
- 3
- 000 words per check
- 1
- 500 words per rewrite
- 1
- 500 credits per month
- up to 150
- 000 AI Checker words and 75
- 000 Humanizer words
- 20
- 000 words per check
- 10
- unlimited credits under fair use
- 20
- 000 words per check
- 10
- 000 words per rewrite
- batches of 40 files
- Premium Active status
Data, GDPR & hosting
A consolidated view of how Dechecker handles your data.
GDPR overview
There is no mention of the GDPR anywhere on the site: the acronym appears zero times across every page collected. The privacy policy instead invokes Directive 95/46/EEC, repealed and replaced by the GDPR in May 2018, together with the 2003 e-Privacy Regulations. Rights are granted jointly to residents of the European Union and Australia: access, copies, rectification, and objection to marketing. Access may carry a legally permitted fee and may be refused in cases the law allows. Erasure, portability and restriction are never mentioned. The policy then directs users to the contact details in section 11 to exercise those rights, but the page stops at section 10 and no such section exists. No Article 27 representative, no data protection officer, no legal basis and no transfer mechanism is named, while transfers outside the EU are announced.
Who owns the data?
The terms contain no clause assigning ownership of the text you paste into the detector: the question is simply never addressed. What the documents do cover is narrower. Anything you post in a public area of the site remains your responsibility, and Dechecker states it may then be collected, used and disclosed by the publisher or by third parties without limitation. In the other direction, the licence granted over the site's own material is temporary, personal and non-commercial, and forbids reproduction, public display, commercial use, reverse engineering and transfer to anyone else. Read together, the user is left with no documented guarantee over submitted content.
Reuse rights
For material published by Dechecker itself, reuse is explicitly restricted: the licence covers a single temporary copy for personal, non-commercial viewing, and prohibits reproduction, public display, commercial use, decompiling and passing the material to anyone else. Content you generate through the tools is never addressed, so no reuse permission is granted or denied in writing. In the other direction the privacy policy is expansive. Data feeds site operation, personalised content and advertising, and marketing messages, and may be shared with the publisher's Clients and their service providers, with affiliated companies, with hosting, payment, emailing and support vendors, with authorities on legal request, and with an acquirer in a sale, merger, change of control or liquidation, due diligence included. Google Analytics is named, alongside Apple IDFA and Android Advertising ID mobile identifiers, and advertising opt-outs are delegated to third parties such as the DAA, the NAI, YourOnlineChoices and the Ghostery extension. One gap deserves attention: the homepage promises text is processed without storing it, a claim the privacy policy never repeats or confirms.
Data retention & training
Hosting summary
The privacy policy states that collected information is typically stored on servers in the United States or in other international territories, and that personal data may be transferred to the publisher's systems, to third-party processors and to affiliated companies located in various countries worldwide. No processor is named, no country of subcontracting is identified, and users cannot choose a hosting region. The site itself is served behind Cloudflare, on an anycast address that says nothing about where processing actually happens. Security is described only in general terms: firewalls, data centres with controlled physical access, and internal reviews of collection, storage and processing practices. No certification such as SOC 2 or ISO 27001 is claimed anywhere, and the publisher explicitly acknowledges that no system achieves perfect security. In short, the jurisdiction is United States by default, with an open-ended possibility of transfers elsewhere and no published safeguard mechanism.
Things to keep in mind
Risks and trade-offs to weigh before adopting Dechecker.
- No AI detector is infallible, and this one publishes no measured accuracy rate. A percentage on a screen is not proof of authorship, and treating it as evidence in a classroom or a client dispute can wrongly accuse someone who wrote every word themselves.
- The same publisher sells detection and evasion side by side, with tools named Bypass AI and AI Detection Remover. Used in an academic setting, that combination invites exactly the behaviour the checker is supposed to discourage.
- Leaning on a rewriter to make your own writing sound acceptable is a slow way to stop developing a voice. The convenience is real, and so is the atrophy if the tool replaces revision rather than assisting it.
- The privacy policy describes an advertising and analytics business, with Clients, viewing data and Ghostery opt-outs, and never states what happens to the text you submit. Pasting a confidential report, an unpublished manuscript or a client deliverable is therefore an unquantified risk.
- Exercising your data rights is effectively blocked: the policy sends you to a section 11 that does not exist, and the site publishes no postal address and no legal entity to write to.
- The refund terms contradict each other, the homepage calls the service completely free while the pricing page requires credits and a subscription, and every paid tier sits at a permanent discount, so the reference price may never be the real one.
- A 4.9 out of 5 rating from 13,832 reviews is declared in the site's own structured data, with no independent review platform behind it. Treat it as marketing, not as social proof.
Setup & Integrations
Technical difficulty
Essentially none. There is nothing to install, no plugin, no browser extension and no API key: everything runs in the browser, and the AI checker is usable on the homepage without even creating an account. Signing in is only needed to keep a history, use the saved library and receive monthly credits. There is no administration console and no configuration step. The single concept worth understanding before you start is the credit system and its consumption rates, since checking, rewriting, grammar and plagiarism each draw from the same monthly balance at different rates.
Deployment
Supported languages
Behind Dechecker
Social
Resources
All the official URLs gathered for verification and reference.
Alternatives
Tools that compete with or complement Dechecker.
Frequently asked questions
Is Dechecker free to use?
How does the credit system work?
Which AI models does the detector cover?
Can I rewrite text after detection?
Can several files be checked at once?
Is there an API or a mobile app?
Is my text used to train AI models?
How long is my data kept?
Can I get a refund?
Who is behind Dechecker?
Should you pick Dechecker?
Dechecker is a capable, generous and unusually cheap AI detector wrapped in a suite far larger than the job needs. What it does well is concrete: sentence-level scoring with an explanation for each flagged passage, a rewriter that preserves the keywords you tell it to protect, automatic re-scoring after every rewrite, batch processing up to forty files, and a free tier that works without an account at all. For a student checking an essay, a freelance writer verifying a delivery, or a blogger cleaning up an AI draft, the 3 USD entry point is hard to argue with.
The reservations are not about the product but about the company behind it. No legal entity is named, no postal address is published, there is no about page and no contact page, and support runs through a Gmail address. The privacy policy reads as though it were borrowed from an advertising technology vendor, discusses Clients and viewing data rather than the text you submit, never mentions the GDPR, and points users to a section 11 that does not exist. No retention period, no deletion procedure, no DPA. Three claims on the site contradict other pages: that it is completely free, that text is never stored, and that refunds are not given.
So the split is clean. As a personal tool for individual work, it delivers more than its price suggests. As a purchase for a school, a university or a company, it fails the first questions a procurement or legal review would ask. And whichever side you fall on, remember that no AI detector is infallible, that this one publishes no measured accuracy figure, and that a percentage on a screen should never be treated as proof of who wrote something.
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