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Pkl vs Dhall: catalog facts
Pkl	Dhall
Best for: Developers who want typed, validated configuration that outputs to common formats	Best for: Teams that want typed, reusable configuration instead of copied YAML or JSON
Free Free and open source under the Apache-2.0 license.	Free Free and open source under the BSD-3-Clause license.
Windows, Command line	Windows, Command line
Generates JSON, YAML, plist and properties files from one source Built-in validation constraints on values All 3 strengths for Pkl Generates JSON, YAML, plist and properties files from one source Built-in validation constraints on values Code generation for Java, Kotlin, Swift and Go	Types and functions catch configuration mistakes before deployment Converts to JSON and YAML All 4 strengths for Dhall Types and functions catch configuration mistakes before deployment Converts to JSON and YAML Semantic hashes and diffs help verify refactors Integrations for several programming languages
A new language for a team to learn Adds a generation step to existing configuration workflows	A new language for a team to learn Adds a conversion step if tools expect plain YAML or JSON
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: BSD-3-Clause
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Pkl pkl-lang.org Catalog checked October 2, 2026	Official website Full listing and sources Sources for Dhall dhall-lang.org Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.