JSON & Data
Validate, repair, diff and optimize JSON — FastMinify guides for APIs, configs and payloads, with practical examples.
GraphQL SDL: Validate and Format a Schema Online
SDL syntax errors, schema review and formatting before merge — extends the existing GraphQL beautifier.
JSON Schema: Validate Data Online (Draft 2020-12)
Test API payloads and config files against JSON Schema Draft 2020-12 — errors pinpointed by JSON Pointer path, in the browser.
OpenAPI: Lint, Format and Structure a Maintainable API
operationId, tags, error responses: practical rules that prevent spec debt when you lint and format OpenAPI files online.
Validate OpenAPI 3 / Swagger Specs Online Before CI
Schema errors, broken $ref, missing responses: validate your OpenAPI 3.0–3.2 API contract in the browser.
JSON to YAML: When to Convert, Pitfalls and Online Tools
K8s, CI/CD, Ansible configs: convert JSON ↔ YAML in the browser without losing structure or types, then beautify the YAML.
JSON Formatter, Diff and Tree Viewer: Compare and Explore Payloads
Format, diff two API responses and explore deep JSON in a tree — a no-install debug workflow in your browser.
Validate and Repair JSON Online: A Practical Guide
Trailing commas, single quotes, Excel exports: diagnose and fix broken JSON before it reaches production.
Optimize REST API Performance with JSON Minification
Speed up your REST APIs by optimizing JSON payloads. Minification, compression, pagination and best practices for ultra-fast APIs.