Developer utilities
Daily tools that clean up data and speed up shipping.
Utyl is a lightweight toolbox for quick data transforms: compare lists, convert formats, and format JSON without leaving your workflow.
Local-first: run everything in the browser.Fast paste-in, clean results.Copy, download, and share-friendly output.Keyboard-friendly for daily use.
Compare Lists
Diff two lists and find overlaps, uniques, and mismatches instantly.
Deduplicate List
Remove duplicate entries and keep only unique values.
Delimiter ↔ Comma
Swap between comma-separated and line-separated values in one click.
JSON ↔ CSV
Convert structured data to the format your workflow needs.
JSON Formatter
Prettify, validate, and quickly spot structural issues.
Built for fast inputs and cleaner outputs.
Paste raw data, tweak your options, and copy the result without hopping across multiple sites. Every tool stays focused on one task with smart defaults.
- Dedicated input and output panels.
- Clear validation messages and formatting hints.
- Export as file or copy to clipboard.
Ready to build your first tool?
Start with a compare lists page or a JSON formatter and expand from there.