Validate structured text
Use JSON Formatter to parse, locate syntax errors, format, or minify JSON.
Developer tools
Format and inspect developer data without sending it elsewhere.
Developer tools here are small inspection utilities with transparent local behavior. JSON Formatter parses the text you paste, reports syntax failures, and can format or minify valid JSON. Color Contrast Checker computes the WCAG contrast ratio from two colors and explains which text-size thresholds the pair meets.
Neither tool uploads the working input. That makes them useful for routine checks, but it does not turn a browser utility into a full security or accessibility audit. A valid JSON document can still have the wrong schema, and a passing color ratio does not prove that focus order, names, states, target sizes, or the rest of a product are accessible.
Pick the inspection you need
Check color contrast
Use Color Contrast Checker for the mathematical ratio and current text thresholds.
Review the larger system
After the quick check, use schema validation, automated tests, and human review appropriate to the project.
Developer review checklist
- Remove credentials, tokens, or personal data before pasting any sample.
- Separate syntax validity from schema and business-rule validity.
- Treat contrast as one accessibility requirement, not the entire audit.
2 tools
Color Contrast Checker
Check an opaque foreground and background color against WCAG 2.2 text and UI contrast thresholds. Preview the pair, find lightness-only passing suggestions, and copy CSS or a share link.
Open tool →JSON Formatter
Format, minify, and validate JSON online without uploading it. Get readable indentation, compact output, and clear syntax feedback directly in your browser.
Open tool →