JSON Tools
Format, validate, minify, and analyze JSON
Format, validate, minify, and sort JSON via the shared DevFoundry json registry — same actions as CLI and MCP. Paste JSON to pretty-print, validate with line-level errors, minify, or sort keys.
Live tool
Shared registryUses the shared DevFoundry registry via the web API — same logic as devfoundry json.
Input0 chars
Output
Parse Error
Valid JSON
Capabilities
Pretty print
Validation
Minify
Sort keys
Stats
Local-First / Privacy
- All processing happens in your browser — nothing is uploaded
- No data is sent to third-party services
- No telemetry or usage tracking
- Your JSON never leaves your browser tab
