Using jar.tools from the Command Line (Free, with cURL)

Decompile Java .class files from your terminal for free using jar.tools' cURL API — no install, no login. Endpoint, examples, rate limits, and scripting tips.

The Free Endpoint: Decompile One `.class`

Reading the Limits

A Small Free-Tier Script

Whole JARs and Extraction: Use the Browser (Free)

FAQ