The most popular alternative is jq, which is both free and Open Source. If that doesn't suit you, our users have ranked 3 alternatives to jello so hopefully you can find a suitable replacement. Other interesting jello alternatives are fx (Free, Open Source) and Emuto (Free, Open Source).
- jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.
- Emuto is a small language for manipulating and restructuring JSON and other data files. Emuto is inspired by jq and GraphQL.