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The Complete Guide to Cropping Images Online
Use free online image cropper to crop photos instantly. Supports drag & drop, remote URLs, 5 aspect ratios (16:9, 4:3, 1:1, 2:3, Freeform), and 20 MB uploads. No signup required crop and download in seconds.
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Margin Calculator – Free Profit Margin & Markup Calculator Online
Calculate profit margin, markup, selling price, and gross profit instantly with our free online Margin Calculator. Fast, accurate, and easy to use.
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Free Online Tax Calculation Tool
Calculate sales tax instantly with our free Sales Tax Calculator. Find tax amount, total price, and reverse tax calculations quickly and accurately.
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Free Online UUID Generator Generate Random UUIDs Instantly
Use OKemall's free UUID Generator to create random UUID v4 strings instantly. One-click generation with copy-to-clipboard perfect for developers, database work, and API testing. No signup required.
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OKemall UTM Builder - The Complete Guide to Creating Trackable Campaign URLs
Use OKemall's free UTM Builder to create trackable campaign URLs instantly. Fill in source, medium, campaign, content, and term parameters — generates a complete UTM-tagged URL with copy-to-clipboard. No signup required.
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OKemall Charge Converter - Convert Electric Charge Units Instantly
Use OKemall's free charge converter to instantly convert between 17 electric charge units including coulombs, ampere-hours, faradays, elementary charge, and more. No signup required.
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