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Free online tools that just work
Calculators, converters, generators, and checkers — fast, private, and free. Everything runs in your browser.
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Finance Calculators
Free calculators for loans, investments, salary, and tax — instant results, no signup.
12 tools →
SEO & Marketing Tools
Generators and checkers for meta tags, schema, slugs, and everything search engines read.
22 tools →
Developer Utilities
Formatters, encoders, generators, and testers that run entirely in your browser.
12 tools →
Text Tools
Clean, count, convert, and compare text in one click — nothing leaves your browser.
10 tools →
Converters
Convert data, units, colors, and file formats instantly, with no upload required.
10 tools →
Business & HR Tools
Invoices, letters, pricing, and payroll calculators for freelancers and small teams.
6 tools →
All tools
Finance Calculators
- CD Interest Calculator
- Credit Card Interest & Minimum Payment Calculator
- Federal Income Tax Calculator (2025)
- Investment Goal Calculator
- Loan Payment Calculator
- Loan Prepayment Calculator (Extra Payments & Lump Sum)
- Pay Raise Calculator
- Rent Affordability Calculator
- Reverse Sales Tax Calculator
- Sales Tax Calculator
- Take-Home Pay Calculator (2025)
- Tip Calculator
SEO & Marketing Tools
- Article Schema Generator
- Conversion Rate Calculator
- CPM / CPC / CPA Calculator
- CTR Calculator
- FAQ Schema Generator
- Google Ads RSA Character Counter & Preview
- Google Review Link Generator
- Hreflang Tag Generator
- Keyword Combiner / Mixer
- Keyword Density Checker
- PPC Keyword Wrapper (Match Types)
- LocalBusiness Schema Generator
- Meta Tag Generator
- Open Graph Meta Tag Generator
- Product Schema Generator
- Review Schema Generator
- ROAS Calculator
- Robots.txt Generator
- SERP Snippet Preview & Meta Length Checker
- URL Slug Generator
- UTM Builder (Campaign URL Generator)
- WhatsApp Click-to-Chat Link Generator
Developer Utilities
- Aspect Ratio Calculator
- Base64 ⇄ Image Converter
- CSS Box Shadow Generator
- chmod Permissions Calculator
- Hash Generator (MD5/SHA-1/SHA-256/SHA-512)
- HTML Formatter / Beautifier
- .htpasswd Generator
- JSON Escape / Unescape
- JSON Formatter & Validator
- SQL Formatter / Beautifier
- WiFi QR Code Generator
- YAML Validator / Linter