Free Developer Tools
15+ utilities for developers that run entirely in your browser. Format JSON, encode Base64, generate UUIDs, convert Markdown, and more. No installation. No signup. No server uploads.
JSON Formatter
Validate, format, and beautify JSON
HTML/CSS Minifier
Compress HTML and CSS
Regex Tester
Test regular expressions
Color Picker
Pick colors and generate gradients
QR Code Generator
Create QR codes for URLs, text, email
SSL Checker
Check SSL certificate validity
Base64 Encoder/Decoder
Encode and decode Base64 strings
UUID Generator
Generate random UUIDs in bulk
Markdown to HTML
Convert Markdown with live preview
Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
Timestamp Converter
Convert Unix timestamps to dates
IP Lookup
Get location and ISP info for any IP
HTTP Header Checker
Inspect HTTP response headers
Port Checker
Test if a port is open on any host
URL Status Checker
Check HTTP status codes for URLs
Why Browser-Based Developer Tools?
Browser-based developer tools process everything locally on your machine. Your code, data, and files never touch a server. This means faster results, better privacy, and zero setup time. Unlike desktop apps, these tools work on any operating system and stay updated automatically.
Frequently Asked Questions
Are these tools free?
Yes, all developer tools on AllDayTools are completely free with no usage limits or registration required.
Is my data secure?
Absolutely. All processing happens client-side in your browser. Nothing is uploaded to our servers.
Can I use these for commercial projects?
Yes. There are no restrictions on personal or commercial use.