Data & Text
JSON Formatter & Validator
Format, validate and minify JSON. Clear error messages with line positions. Runs fully in your browser — safe for sensitive data.
Runs in your browser
Nothing uploaded
Free, no signup
Ctrl + Enter to run · Recent brings back your last inputs · Everything stays in this browser
Image Resize Calculator
Calculate new dimensions while preserving aspect ratio
Password Strength Checker
Analyze password entropy and weaknesses
YAML ↔ JSON Converter
Convert between YAML and JSON
JSON to YAML
Convert JSON to YAML format
JSON Schema Generator
Infer and validate API contracts
API Response Diff
Find breaking response changes
Made something with AI? Share it as a private link.
Drop in the HTML from Claude, ChatGPT or any editor and get a link your client can open anywhere — with a password, view tracking, comments and approval.