Tools for Developers
Free online tools designed for developers. No signup, process directly in your browser.
Recommended Tools
Format and beautify JSON data with proper indentation and highlighting. Free online JSON formatter for readable code validation.
Encode and decode Base64 strings for data transmission. Free online Base64 converter for binary data and API payloads.
Test and debug regular expressions with live matching highlights. Free online regex tester for pattern validation in your browser.
Encode and decode URL strings to proper percent-encoding format. Free online URL encoder for safe web addresses and query parameters.
Convert CSV data to JSON format with header detection. Free online CSV to JSON converter for data migration and API prep.
Common Needs
Other Use Cases
Frequently Asked Questions
Are these developers tools free?
Yes. Every recommended tool is free to use with no signup and no daily limits.
Do I need to install anything?
No. All tools run directly in your browser — no downloads or plugins required.
Are my files private?
Yes. Files are processed locally on your device and never uploaded to a server.