Check a website change
Separate DNS answers, certificate problems, and redirect behavior before changing another setting.
Follow the worked guideOpen Website InspectorCalculate dates and costs, convert measurements, format JSON,
edit images, and check websites. Free, with no signup.
10 tools found
Add or subtract years, months, weeks, and days from a date. See the resulting date, weekday, and calendar-day difference.
Convert centimeters to feet and inches, or feet and inches to centimeters. Compare meters, total inches, and decimal feet with exact unit factors.
Compress a JPG, PNG, or WebP image locally. Adjust JPG or WebP quality, compare file sizes, and download the result without uploading your image.
Check public DNS, HTTPS, redirects, response headers, and basic page signals in one report.
Compare fulfillment quotes using the same order profile. Normalize storage, receiving, pick & pack, shipping, returns and monthly fees into a true cost per order.
Format, validate, and explore JSON. Clear structure, precise data, all in your browser.
Count words and characters, with reading and speaking estimates.
Find percentages and changes, apply a discount or increase, and work backward from a part to its total.
Build campaign URLs with consistent tracking parameters.
Convert Unix seconds or milliseconds to dates, and back.
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Separate DNS answers, certificate problems, and redirect behavior before changing another setting.
Follow the worked guideOpen Website InspectorCrop and resize an image, choose an output format, and inspect its actual dimensions and file size.
Follow the worked guideOpen Image CropperCompare the financed principal, nominal rate, schedule, and entered costs with a reproducible example.
Follow the worked guideOpen Loan Payment CalculatorPut two providers against the same orders, inventory, shipping assumptions, and monthly-minimum rules.
Follow the worked guideOpen 3PL Quote ComparisonWork through invalid syntax, large numeric IDs, duplicate keys, and nested JSON strings without changing the data you meant to keep.
Follow the guideCompare two illustrative fulfillment quotes, calculate monthly minimum shortfalls, and see why the lowest pick fee may not mean the lowest bill.
Follow the guideCheck A, AAAA, CNAME, MX, NS, and TXT answers, distinguish a cached response from the intended record, and separate DNS problems from HTTPS or redirect problems.
Follow the guide