Category Hub
Free Online Developer Tools
Essential utilities engineered for software engineers, API developers, and data specialists.
QR Code Generator
Generate high-resolution custom QR codes for URLs, text, Wi-Fi networks, emails, and phone numbers instantly.
Open Tool
JSON Formatter & Validator
Format, beautify, minify, and validate JSON data with instant syntax error locating and tree view.
Open Tool
Regex Tester & Debugger
Test, validate, and debug regular expressions in real-time with match highlighting and capture group inspection.
Open Tool
URL Encoder / Decoder
Encode and decode URLs, query strings, and percent-encoded characters instantly in your browser.
Open Tool
FAQ
Developer Tools FAQ
Is it safe to paste proprietary JSON, API responses, or regex patterns?
Yes. All developer tools run entirely in your local browser sandbox. No input is ever sent over the network or saved anywhere.
Do generated QR codes expire?
No. Our QR Code Generator creates static, permanent QR codes that encode your data directly into the matrix without expiring or relying on third-party redirection servers.
Can I download vector SVG QR codes?
Yes, you can export your custom QR codes in both pixel-perfect PNG and infinite-resolution vector SVG formats.
Does the JSON validator show the exact line of syntax errors?
Yes. Our validator inspects the error pointer and displays exact line and column numbers to help you fix syntax problems instantly.