Free Online Converters & Utilities
Instant, private tools for developers and designers. Transform formats effortlessly.
No signup•No limits•Client-side processing
Why Okel Tools?
Built with developers and designers in mind. Fast, private, and honest.
Start with MutaCode
The only tool you need for data format conversion. Convert between XML, JSON, YAML, CSV, TOML, SQL and Base64 instantly.
Bidirectional conversion
Convert both ways between most formats
Monaco code editor
Professional syntax highlighting and editing
Files up to 100MB
Handles large files with optimized processing
Copy, download, or drag & drop
Flexible input and output options
More Tools on the Way
We're building utilities for developers and designers every week.
How It Works
Simple, transparent, and privacy-first.
Paste or Upload
Paste code directly, upload a file, or drag and drop. No signup needed.
Convert Instantly
Select formats and get your converted output immediately. Real-time sync.
Copy or Download
Copy to clipboard or download as a file. Your data stays private.
Transparency: You get the full tool experience on the left. A non-intrusive billboard ad supports the platform on the right. No pop-ups, no tracking tricks.