DEVELOPERS // CONFIG TOOL
Make config
make sense.
Format, validate, compare, and convert JSON, YAML, and TOML without uploading your files. See the exact line that needs attention and leave with clean output.
INPUT
Edit the source.
OUTPUT
Use the clean version.
VALIDATION
Paste a file to begin.
The tool stays in your browser. It does not send source, credentials, or configuration files anywhere.
Use JSON, YAML, or TOML above, then choose Format or Validate now.
COMPARE
See what changed.
Paste a second version to compare it with the current input. Differences stay local and are shown by line.
CONVERT
Change the format.
Convert structured JSON, YAML, and TOML locally. Conversion is intentionally conservative: comments and format-specific features may not survive a change of format.
USEFUL BY DESIGN
Built for real config work.
JSON errors show their line and column. YAML and TOML checks point to the line that could not be understood.
Format or minify JSON, normalize YAML, and produce readable TOML without leaving the page.
Move structured data between JSON, YAML, and TOML with a visible warning about comments and special syntax.
No upload, account, API key, or server processing. Your configuration remains in this browser.