ChatGPT extension privacy
Your chats deserve fewer recipients.
Client details. Unpublished work. Personal questions. What you share with ChatGPT can be sensitive. Your extension should help you work with it while keeping that content out of another provider’s servers.
StylerGPT’s privacy-first approach keeps search, saved prompts, folders and document export local. Here is how that compares with Superpower ChatGPT, GPT Master and AI Toolbox.
Compare where your data goesPrivacy starts before the upload.
Once content reaches another service, you rely on that provider’s access controls, retention rules and deletion practices. A privacy policy explains its commitments; you cannot directly observe all of its internal processing from your browser.
Keeping the task local removes that additional handoff. The provider does not need to protect or delete a copy it never received.
StylerGPT · local conversation tools
Your browser processes the content.
Search, prompts, folders, prompt checks and export stay on-device. No conversation upload to StylerGPT for these tools.
When a feature uses a provider’s server
Your content reaches another service.
That service processes the upload under its own privacy rules, even when it promises to discard the content afterward.
ChatGPT itself remains an online service. This comparison concerns the additional recipients introduced by an extension; it does not change what you send to ChatGPT or your ChatGPT account’s data settings.
Compare where your data goes.
Among these four extensions, StylerGPT is the only one whose conversation tools described here avoid sending chat content through the extension provider’s servers. Each alternative has local features alongside workflows that transmit content.
| Extension | What stays local | What reaches the provider |
|---|---|---|
| StylerGPTLocal by design | Search index, saved prompts, history, folders, prompt guard checks and all five export formats, including PDF and DOCX. | No conversation content for these tools. Prompt enhancement goes directly to ChatGPT. Limited licensing and trial data are handled separately. |
| Superpower ChatGPT | PDF generation and the Chrome prompt optimizer use browser-side paths. | Conversation sync can upload full chats. Saved prompts, notes, highlights, annotations and audio features also send content. |
| GPT Master | Folders, notes, bookmarks and the saved prompt library use local storage. | Side Chat and server-based prompt optimization send questions, drafts or conversation context to GPT Master’s AI services. |
| AI Toolbox | Search and TXT, Markdown and JSON export run locally. Personal prompts and chains have a device-only option. | The normal PDF path uploads the conversation. Context summaries and cloud organization also use AI Toolbox’s services. |
On smaller screens, scroll the table sideways. Read the feature-specific details below.
01 / Superpower ChatGPT
A synchronized workspace adds another recipient
Superpower’s conversation sync can send full conversation records to its own service. Other feature requests transmit saved prompts, notes, highlights, annotations and pinned-message text. Audio generation also sends selected message text for processing.
Its policy says service data is hosted on AWS and is not sold, used for advertising or used to train AI models. These commitments describe how received data is handled. They do not mean that the data stays in your browser.
Some paths are local: Superpower’s PDF generator and Chrome prompt optimizer run in the browser. That matters when choosing a feature, but does not make its synchronized workspace local. The data sent depends on the features you use and enable.
StylerGPT keeps its search index, saved prompts and folder assignments on your device, without a StylerGPT-hosted copy of your conversations.
02 / GPT Master
Local organization, separate AI processing
GPT Master keeps its organizer and prompt library locally. Its AI features have a different boundary: Side Chat sends your question, the selected passage and the relevant user/assistant exchange. Prompt optimization can send your draft with recent conversation context.
Its policy names OpenRouter and downstream model providers for AI processing, and describes retention of AI request and result content for up to 30 days. It also describes a Side Chat quality evaluation through your signed-in ChatGPT session, with the answer returned to GPT Master.
An optimizer storage control can limit content retention. On a server-processing path, the draft and context still need to be transmitted to produce the answer. Choosing not to store a request does not remove that transmission.
StylerGPT’s Prompt Enhancer communicates directly with ChatGPT. Your draft does not pass through an additional StylerGPT AI service.
03 / AI Toolbox
An export can become a content upload
AI Toolbox’s normal PDF workflow sends conversation messages and their title to its server for rendering; the full comparison also notes a local fallback. Long-context summaries send selected messages and their title for server processing. Its policy identifies OpenAI as the processor used for summaries.
The policy says PDF and summary content is processed temporarily and discarded. That is a retention commitment after an upload. It also describes cloud storage for organization and saved prompt data.
AI Toolbox’s search index stays on-device, and TXT, Markdown and JSON exports are generated locally. Personal saved prompts and chains can use a device-only setting. Folder operations and custom tag rules still use its service, so that setting does not make every workflow local.
StylerGPT generates PDF and DOCX in your browser. Exporting a sensitive conversation does not send it to an additional document-conversion service.
How StylerGPT keeps your data local.
The advantage is concrete: fewer services receive your conversation content. These are the boundaries to keep in mind.
Local tools, direct ChatGPT requests.
Conversation retrieval uses your existing ChatGPT session. Prompt Enhancer sends its request directly to ChatGPT. Exports can fetch fonts or referenced images, but do not upload the conversation to a conversion server.
Optional checks before you send.
Prompt Guard checks supported outgoing text locally, without storing prompts or findings. It is off by default, can miss sensitive values and does not inspect files, images, voice or connector uploads.
Limited service data still exists.
Trial verification, licensing and payments use limited identifiers and technical data as explained in our privacy policy. Local conversation processing does not mean the extension has no network activity.
Other extensions keep their own boundaries.
Using StylerGPT alongside another extension does not stop that extension’s uploads. Choose which tools handle sensitive content, and remember that local files and browser data still need protection on your device.