Safetyper review
A self-managed browser checker for technical users who bring their own AI access.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Safetyper is an open-source browser extension for real-time grammar, spelling, and punctuation corrections while users type on websites such as Gmail, Slack, and Notion. It is aimed at technical users and privacy-conscious individuals or teams who want browser-based AI writing assistance while supplying their own model access. The extension supports Chrome and Firefox, with universal input detection across editable web fields.
Its provider support is the central part of the product’s ecosystem fit. Users can connect OpenRouter or Groq with their own API keys, or use a local Ollama model. Safetyper also includes secure API key storage and key-format validation, while its open-source model supports a self-managed approach. This setup gives technical users control over which AI provider processes text, but it also means the experience depends on configuring an external provider or local model rather than using an included writing service.
The inline visual diff display makes suggested changes easier to review by showing the difference between existing and proposed text. Real-time correction covers grammar, spelling, and punctuation, and smart caching is designed to reduce API calls. Those features make Safetyper a focused fit for people who want AI checking directly inside editable web fields. It is less suitable for users seeking a broader writing application, standalone desktop coverage, or a turnkey checker that does not require provider credentials or model access.
Safetyper pros and cons
- Where it wins
- Supports local Ollama models plus OpenRouter and Groq API keys
- Detects editable web fields across sites such as Gmail, Slack, and Notion
- Shows inline diffs and uses caching to reduce API calls
- Where it doesn't
- Requires access to an external model provider or local Ollama
- Browser-based coverage does not extend beyond supported web fields
- Users must manage their own provider keys and model access
Safetyper fact sheet, pricing and score →
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