DEVELOPER TOOLS
Code faster with powerful utilities
Format JSON, decode JWT tokens, test regex patterns, and minify code. All processing happens in your browser for maximum speed and privacy.
- ✓JSON formatter with syntax highlighting
- ✓JWT decoder with payload inspection
- ✓Regex tester with live matching
- ✓Code minifier for JS, CSS, HTML
MOST POPULAR
Essential Tools for
Every Developer
The most used tools by developers, marketers, and designers worldwide
Dev Tools
JSON Formatter
Format, validate, and beautify JSON data instantly. Most popular developer tool with syntax highlighting.
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Dev Tools
JWT Decoder
Decode and verify JWT tokens securely in your browser. Essential for authentication debugging.
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Marketing
UTM Builder
Create UTM tracking links for marketing campaigns. Track your traffic sources effectively.
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Dev Tools
Base64 Encoder
Encode and decode Base64 strings quickly. Perfect for data encoding and API integration.
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Design
Color Palette Generator
Generate beautiful color palettes for your designs. Export in multiple formats.
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Calculator
Percentage Calculator
Calculate percentages, discounts, and increases instantly. Most used calculator tool.
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SEO & MARKETING
Optimize your digital presence
Generate meta tags, build UTM parameters, analyze content readability, and preview search results. Everything you need for better SEO.
- ✓Meta tag generator with live preview
- ✓UTM builder for campaign tracking
- ✓Readability checker with scores
- ✓SERP preview for Google results
REAL-TIME INSIGHTS
Visualize usage through in-depth analytics
From high-performing tools to trending features, understand what drives user engagement.
Total Tool Usage
18.5K
+42.7%
Active Users
3.8K
+35.2%
Tools Available
95
+12.5%
Page Views
52K
+28.9%
DESIGN TOOLS
Create beautiful, accessible designs
Generate color palettes, check contrast ratios, create gradients, and test for color blindness. Professional design tools at your fingertips.
- ✓Color palette generator with harmony rules
- ✓WCAG contrast checker for accessibility
- ✓CSS gradient generator with live preview
- ✓Color blindness simulator
CALCULATORS
Plan smarter with business calculators
Instant SaaS metrics, ROI, and break-even calculations to guide your decisions. No spreadsheets required.
- ✓SaaS MRR, ARR, churn and LTV calculators
- ✓Break-even and pricing profit calculators
- ✓Marketing ROI and CAC payback
- ✓Currency-safe, offline, fast results
PROVEN IMPACT
Growing together,
click by click
Join 100,000+ active users who trust Free Tools to create, format, and optimize their work across the web.
95+
tools available
100K+
monthly users
500K+
tools used
100%
privacy guaranteed
Loved by 100,000+ users worldwide
From developers to marketers, designers to founders - professionals everywhere rely on our tools
These tools have saved me hours of work every week. The JSON formatter alone is worth its weight in gold.
The SEO tools are incredibly comprehensive. I can generate meta tags and test them all in one place.
The color tools help me ensure accessibility while creating beautiful palettes. Essential for my workflow.
The calculators helped me understand my metrics better. No more complex spreadsheets needed!
JWT decoder and regex tester are my daily companions. Fast, secure, and reliable.
The readability checker improved our content quality significantly. Our engagement has never been better.
Explore by Category
Choose from our comprehensive collection of professional tools
Developer Tools
JSON formatters, JWT decoders, regex testers, and code utilities
SEO & Marketing
UTM builders, metas generators, and SEO optimization tools
Design Tools
Color palettes, contrast checkers, and gradient generators
Calculators
SaaS metrics, financial calculators, and business tools
Got Questions?
Find answers to common questions about our free tools
Are these tools really free?
Yes! All our tools are completely free to use. No signup required, no hidden fees, no premium tiers. Just powerful tools that work.
Is my data secure?
Absolutely. All processing happens directly in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security.
Can I use these tools commercially?
Yes, all tools can be used for both personal and commercial projects. We don't place any restrictions on how you use the output from our tools.
Do I need to create an account?
No account required. Just visit the tool page and start using it immediately. We believe in frictionless access to useful utilities.
Are there any API limits?
Since everything runs in your browser, there are no API limits or rate restrictions. Use the tools as much as you need, whenever you need them.
Can I suggest new tools?
Absolutely! We're always looking to expand our collection. Send us your suggestions through our contact page and we'll consider adding them.