jqwik

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Code · Vendor site 2026-10-04

jqwik brings property-based testing to Java and Kotlin on the JVM, generating randomized inputs to falsify incorrect assumptions about code behavior. Developers write properties with annotations while jqwik shrinks failing cases and integrates with JUnit Platform.

Updated 2026-10-04View sources

Official website

Category: Code
Free access: jqwik is an open-source library distributed via Maven with documentation on jqwik.net and no vendor pricing.
API access: User guide documents @Property annotations, arbitraries, and JUnit Platform integration APIs.

Is jqwik right for you?

A good fit for

Java and Kotlin engineers adopting property-based testing to complement example-based unit tests.

Before you choose

Starting with version 1.10 the project publishes an Anti-AI Usage Clause that restricts certain AI-assisted usage.

PBT for the JVM

jqwik.net introduces property-based testing that combines randomized data generation with familiar JUnit-style properties for Java and Kotlin codebases.

What it can do

Features & capabilities

Unknown is different from unavailable. Each fact carries its own evidence.

Capability	Value	Evidence	Checked
Property-based tests	Homepage explains jqwik generates many input sets to falsify properties describing generic invariants.	Facts sourced	2026-10-04
Latest release	Site banner lists latest release 1.10.1 with user guide and release notes links.	Facts sourced	2026-10-04
Language focus	Overview notes primary support for Java and Kotlin with Groovy compatibility.	Facts sourced	2026-10-04

Understand the total cost

jqwik pricing & plans

Free

jqwik is an open-source library distributed via Maven with documentation on jqwik.net and no vendor pricing.

Access: jqwik is an open-source library distributed via Maven with documentation on jqwik.net and no vendor pricing.

Explore pricing & history

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The practical questions

Frequently asked questions

What is jqwik used for?

Does jqwik have a free plan?

jqwik is an open-source library distributed via Maven with documentation on jqwik.net and no vendor pricing.. This record lists ongoing free access; check the plan limits before starting.

How much does jqwik cost?

No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.

Can I use jqwik through an API?

User guide documents @Property annotations, arbitraries, and JUnit Platform integration APIs.. API access and subscription access may have different terms; consult the linked sources.

What should I check before choosing it?

Starting with version 1.10 the project publishes an Anti-AI Usage Clause that restricts certain AI-assisted usage.

Price history

No retained pricing changes yet. A current price alone does not establish a historical trend.

How this profile is supported

Identity and profile

Reviewed vendor source

Read original source ↗

2026-10-04

Facts apply to the named version and check date. Send a sourced correction if something changed.