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A free, searchable library of online tools — calculators, converters, and utilities — for developers, designers, marketers, and everyday users. No signup needed: pick a tool, use it in your browser, and get results instantly. Categories include PDF, image, developer, AI, and security tools. Free forever.

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All-time revenue

All-time

MRR (estimated)

No active subscriptions

Founder

@marcfergusonbiz

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Anonymous Startup

Revenue (30d)

$355k

MRR

Total

$1.3M

Dropkiller

We offer a subscription-based service that provides e-commerce entrepreneurs with access to product insights, ad creatives, and market analysis tools. Customers are charged at checkout or on a recurring monthly basis.

Revenue (30d)

Cool Free Tools

Cool Free Tools

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Anonymous Startup

Dropkiller

Product updates

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SyncForge

The database of verified startup revenues