Basic syntax sanity check for JSON (full parse), XML (root-element check), and YAML (real js-yaml parse) — JavaScript not included. Code never leaves your device. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Basic structural check for OpenAPI/Swagger specs — required top-level fields, non-empty paths, and $ref presence. A heuristic screen, not a full spec validation: passing here does not guarantee a valid spec.
Validate YAML formatting, detect indentation issues, convert YAML to JSON, and minify YAML comments. Code never leaves your device — formatting and validation run locally in your browser.
Check JavaScript code for syntax errors using the Function constructor. Validate code before execution. Code never leaves your device — formatting and validation run locally in your browser.
Convert data between JSON, CSV, XML, YAML, and TSV with structure preserved. Migrate configs across stacks without rewriting — local PapaParse/xml2js/yaml parsing, free, no signup.
Bidirectional YAML to JSON and JSON to YAML conversion with auto-format detection and real-time preview. Perfect for configuration files, API payloads, and data migration.
JSON (real parse), XML (root-element presence only), and YAML (real js-yaml parse — bad indentation and tabs fail). No JavaScript or grammar-aware parsing.
None — errors name the format and message only. Fix from the top of the snippet.
No — validation reports problems; deliberate edits stay yours to make.
No — validation runs locally in your browser, free with no signup.