Refraction takes a block of code and produces the surrounding work that developers routinely defer: unit tests, refactors, documentation and explanations. It runs in the browser across a wide range of languages, so there is no editor extension or project setup to get an answer.
The scope is deliberately narrow and better for it. Rather than competing with in-editor assistants on writing new code, it targets the tasks that get skipped under deadline, where a decent generated first pass genuinely beats the nothing that would otherwise exist.
Note that the name collides with Refraction AI, an unrelated autonomous delivery-robot company. This listing covers the developer tool at refraction.dev. Generated tests still need reading before they are trusted, since a test asserting the wrong behaviour is worse than no test.
Key features
Unit test generation from pasted code
Refactoring suggestions and code explanations
Documentation generation for existing functions
Browser-based with no editor extension required
Screenshots & demo
Pricing
Refraction offers a free plan, with paid upgrades for higher limits and more features.
Pricing is provided as a guide. Check the official site for the latest plans.
Is Refraction expensive?
Refraction has no advertised paid tier. Among the 92 priced tools we list in Coding, the median entry price is $19.5 a month.
66% of Coding tools in the directory offer a free tier, and this is one of them.
Compared against every priced listing in Coding, recalculated as the catalogue changes. Method and the full market breakdown are in our AI tool pricing study.
Pros & cons
Pros
Targets the work that actually gets skipped under deadline
No setup, so it is usable on any codebase immediately
Cons
Generated tests can assert the wrong behaviour if accepted unread
Browser paste workflow is clumsier than an in-editor assistant
Refraction takes a block of code and produces the surrounding work that developers routinely defer: unit tests, refactors, documentation and explanations.
Is Refraction free?
Yes, Refraction offers a free plan. Paid plans unlock more features and higher usage limits.
What are the best Refraction alternatives?
The closest matches in the directory are DocuWriter.AI, Morph, and DebuggAI, compared side by side above.
Switch between GPT, Claude, Gemini and LLaMA instantly instead of locking into one vendor – AI code completion, debugging, and unit-test generation plugged into VS Code, Cursor, Continue and more.
