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FastTool opens practical tools directly in your browser: PDF cleanup, image conversion, JSON formatting, calculators, SEO previews, and AI workflow checks. Most tools run locally, with visible proof and copyable output.

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LCM Calculator Calculate least common multiple with GCD, prime-factor proof, and a JSON receipt. Open calculator Amortization Calculator Estimate payment, total interest, payoff date, extra-payment savings, and schedule rows. Open calculator JSON Formatter Format and inspect JSON before pasting it into an API, script, or automation flow. Open formatter PDF Compressor Make a PDF smaller for upload and check the result before sending it. Open PDF tool Image Compressor Reduce image size in the browser for forms, websites, and social previews. Open image tool Google Snippet Preview Preview title and description length before publishing a page. Open SEO tool

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