Free Online Formatters
Format and beautify common developer formats without sending files to a remote service. DevTooKit formatters run in your browser so production configs, API payloads, and query drafts stay private. Pick JSON, SQL, HTML, or another formatter below — then jump between related tools in one workspace.
8 tools in this category · 91 total on DevTooKit · local-first, no upload
Tools in Formatters
- JSON FormatterBeautify, minify, and validate JSON. Catch syntax errors with line-precise feedback.
- XML FormatterPretty-print and minify XML documents with proper indentation.
- YAML FormatterValidate and reformat YAML with consistent indentation for configs and CI files.
- TOML FormatterPretty-print and validate TOML configuration files used by Rust, Python, and CLIs.
- SQL FormatterBeautify SQL queries with dialect-aware formatting (MySQL, Postgres, etc.).
- CSS FormatterBeautify or minify CSS with Prettier-powered formatting.
- JavaScript FormatterBeautify or minify JavaScript / TypeScript using Prettier.
- HTML FormatterBeautify or minify HTML documents with Prettier.
FAQ — Formatters
Do these formatters upload my code?
No. Each formatter processes input locally in your browser.
Which formats are included?
JSON, XML, YAML, TOML, SQL, CSS, JavaScript, and HTML formatters are available in this category.