Developer tools
Focused utilities for everyday debugging — JSON workflows and network lookups. Your data stays in the browser unless a tool explicitly calls a public API (like IP lookup).
JSON & data
Format, validate, diff and convert JSON — all in your browser.
JSON Formatter
Pretty-print, validate and syntax-check JSON.
OpenJSON Validator
Pinpoint the exact line and column of any JSON syntax error.
OpenJSON Minifier
Strip whitespace to shrink JSON for APIs and configs.
OpenJSON Diff
Compare two JSON documents — added, removed and changed paths.
OpenJSON → CSV
Flatten nested JSON into spreadsheet-friendly CSV.
OpenJSON → TypeScript
Generate TypeScript interfaces from a JSON sample.
OpenNetwork
Look up IPs, ASNs and approximate geolocation.