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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.