Developer Tools
These developer tools help with formatting, validating, parsing, generating, and debugging common development data and code structures.
About these developer tools
This category page collects the main developer tools available on Toolyo. These tools are built for speed, simplicity, and direct browser-based use.
Instead of using heavy software, you can open one focused tool, solve one task, and move on quickly. This makes Toolyo useful for everyday workflows and fast checks.
Featured in this category
Format and validate JSON instantly.
Validate JSON data instantly.
Escape HTML special characters.
Convert escaped HTML back to normal text.
Normalize unicode text instantly.
Minify HTML code instantly.
How to use these tools
- Choose the tool that matches your task.
- Paste or type your input into the tool page.
- Copy the result and continue your workflow.
Format and validate JSON instantly.
Validate JSON data instantly.
Escape HTML special characters.
Convert escaped HTML back to normal text.
Normalize unicode text instantly.
Minify HTML code instantly.
Minify CSS code instantly.
Minify JavaScript code instantly.
Generate UUID values instantly.
Generate strong passwords instantly.
Generate random numbers instantly.
Test regular expressions instantly.
Check color contrast ratios instantly.
Generate CSS gradients instantly.
Format SQL queries instantly.
Minify SQL queries instantly.
Prettify HTML code instantly.
Prettify CSS code instantly.
Prettify JavaScript code instantly.
Parse URL query strings instantly.
Build URL query strings instantly.
Validate email addresses instantly.
Extract domain names from text instantly.
Check password strength instantly.