SlopProx

Overview

SlopProx screens text, images, and YouTube videos as you browse, with optional ad-network blocking. It suits people who want those checks to run locally, especially editors and researchers working in browser-based workflows. Its main advantage is on-device processing; detection can still be wrong.

Key features

Text and image screening

Text detection combines more than 76 curated phrases and structural signals with an on-device ONNX transformer. Image detection draws on three ONNX vision models and checks C2PA manifests, EXIF data, and PNG metadata. The range of signals makes SlopProx useful as a first-pass screening aid, not a final judgment: false positives and false negatives can occur.

YouTube and browsing tools

The YouTube filter checks for an AI disclosure before the player renders, and can overlay videos or dim cards in feeds and search results. This is useful for people who want disclosures surfaced while browsing, but it should not be mistaken for a general verdict on a video's origin.

Optional Enhanced Mode uses a local HTTPS proxy to block 29 listed ad networks. It installs a local CA certificate in the user certificate store without requiring admin rights. That adds a distinct blocking function, though it also means installing a certificate; readers who only want AI screening can leave Enhanced Mode aside.

Privacy and workflow

The maker says processing happens locally, without cloud calls or telemetry, and that no data leaves the machine. SlopProx is open source under GPL-3.0. Its browser extension is described for use with email, Google Docs, and a CMS, so it can fit review work in those tools rather than requiring a separate checking workflow.

Pro forensic view

SlopProx Pro is described as offering a browser-based breakdown of signals for selected text or images, including a verdict and confidence. Pro is marked coming soon, so that forensic view is not a reason to choose the product today.

Pricing

The Open Source plan is free, with free-forever access, open-source licensing, and on-device processing. It is the straightforward choice for individuals who want the core project without a subscription.

Individual Pro costs £49 a year, billed per year, for one seat with all model updates included. It is aimed at an individual who wants the Pro offering, but its described forensic capability is still coming soon.

Teams costs £10 a month per seat, billed annually, with a minimum of 5 seats. It includes a shared licence key and covers the whole team, making it the plan for group use rather than a small one-person budget. The minimum commitment is five seats; the annual billing term matters even though the price is expressed monthly.

Platforms

SlopProx is offered as a Windows desktop app and browser extensions for Chrome and Firefox. Its platform coverage also includes Linux and macOS. The maker says broader device and system support is planned.

Who it's for

SlopProx is a good fit for people who want local screening across text, images, and YouTube, and for editors who work inside email, Google Docs, or a CMS. The Pro page names newsrooms, universities, journalists, researchers, freelance editors, and legal or research users as intended audiences. Anyone who needs dependable proof of authorship should look elsewhere or treat SlopProx's findings as one signal among others, given the stated possibility of detection errors.

Pros and cons

• Pros: Text, image, and YouTube checks are brought into browsing, including checks for YouTube disclosures before the player renders.
• Pros: On-device processing, according to the maker, avoids cloud calls and telemetry; the project is GPL-3.0 open source.
• Pros: Optional Enhanced Mode blocks 29 listed ad networks through a local proxy, without requiring admin rights to install its certificate.
• Cons: False positives and false negatives can occur, so results should not be treated as conclusive.
• Cons: The browser-based Pro forensic breakdown is not yet available.
• Cons: Teams requires at least five seats and annual billing, which is a poor fit for a small group seeking a short-term plan.

Alternatives

If you want a free local detector with no usage limits and no API key, AI Detect is an alternative for Linux, macOS, Windows, and self-hosted use. For a broader writing platform, Trinka is a freemium option with a free plan and support for API, extension, desktop, web, and self-hosted platforms.

Grammarly offers a free plan with 100 AI prompts per month and a Pro plan with 2,000 AI prompts per member per month; its listed platforms are Android and iOS. Sapling may suit users who want a detector with a free trial, including API, extension, self-hosted, web, and Windows support; its free plan caps checks at 2,000 detector characters and batches at five files.

ZeroTrue offers a free plan with 100 detections per month, API access, a web dashboard, and community support, for readers who prefer that mix and its Android, iOS, web, API, and self-hosted platforms. GPTZero is another freemium alternative, with a free plan capped at 10,000 words per month and 50,000 characters, and support for API, extension, and web.

IA Checker may suit readers looking for a web or iOS tool that bundles AI text detection with paraphrasing, grammar checks, translation, and summaries. Polygraf AI Detector offers a free trial and a free plan with 2.5K monthly tokens, approximately 2K words, for users comparing token-based detection allowances.

Browse the AI Detection Software category for more options.

Verdict

Choose SlopProx if you want local, in-browser screening of text, images, and YouTube, with optional ad-network blocking in the same tool. Its privacy-oriented approach and open-source license are compelling; its key limitation is that detection can be wrong, and the planned forensic view is not yet ready. For conclusive authorship judgments, it is not the right standalone choice.