jello

Name: jello
Author: Kelly Brazil

A command-line tool for filtering JSON and JSON Lines with Python expressions.

By Kelly Brazil

Free Open sourceWindows macOS Linux Command line

Official websitegithub.com

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Alternatives

qpqp filters and transforms JSON and newline-delimited JSON, while jello uses Python expressions to work with those formats.
gronA command-line tool that flattens JSON into discrete assignments so it can be searched with grep.
jqjq provides a dedicated filter language for slicing, mapping and transforming JSON, while jello filters JSON with Python expressions.
jidExplore JSON interactively with query suggestions.
fxInspect JSON interactively from your terminal.
gojqgojq runs jq-style queries through a Go implementation, while jello uses Python expressions to filter JSON and JSON Lines.

See all alternatives

About jello

jello reads JSON or JSON Lines from standard input or files and makes the data available as Python lists and dictionaries. You can query and reshape it using Python syntax, then output JSON, JSON Lines, shell array lines, or a searchable schema.

It can be installed with pip or a system package manager. The project also lists MSI packages and binaries for download.

Strengths

Queries JSON using Python list and dictionary syntax
Accepts JSON and JSON Lines from files or standard input
Can output JSON, JSON Lines, shell arrays, or a schema

Limitations

Queries use Python syntax rather than jq syntax

Details

Pricing: FreeFree and open source under the MIT license.
License: MIT
Developer: Kelly Brazil
Platforms: Windows, macOS, Linux, Command line
How it runs: Downloadable app
Best suited for: People who want to query JSON from a shell using Python syntax
Categories: CLI tools, Developer tools
Last verified: October 8, 2026
Added: October 8, 2026
Provenance: Selected from the Homebrew formula
Sources: github.com/kellyjonbrazil/jello

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