Convert JSON/YAML, encode Base64, calculate hashes and compare text offline.
Free open-source desktop utilities · Windows, macOS and Linux.

Developer tools
Pretty-print or minify JSON while preserving its structure and values.
Pretty-print or minify JSON while preserving its structure and values.
Pretty-printing and minifying JSON only. API output was tested; native desktop integration and the other DevUtils utilities are outside this comparison.
Replaces the JSON formatting/minification slice of DevUtils, not its native macOS toolbox, offline integration or all 47+ utilities. Hands-on checks covered the API, not the browser UI. API requests leave your machine; client-side processing is a separate website claim. Anonymous API is rate-limited to 10 requests/minute. Terms prohibit using its API to build a competing clone. Paid API upgrades are optional.
Each comparison covers the workflow described above, rather than every paid feature.