HTTP Headers Checker - Online Inspect URL Response Headers
Enter a URL and see the full HTTP response headers returned by the server. Detect redirects and server type. Useful for SEO and web debugging.
UD5 Toolkit
Trace every hop in a redirect chain. Uncover hidden SEO pitfalls and understand exactly how search engines see your URL.
| # | Status | URL | Type | Response |
|---|
Enter a URL and see the full HTTP response headers returned by the server. Detect redirects and server type. Useful for SEO and web debugging.
Check HTTP status codes for multiple URLs at once. Identify broken links and redirects. All requests made via browser fetch.
Pull out all URLs and links from text. Extract domains, paths, and protocols. Perfect for SEO scraping or analyzing text documents. Client-side execution.
Query DNS records for any domain directly from your browser using DNS-over-HTTPS. See A, AAAA, MX, CNAME, and TXT records. No logs.
Convert speed units such as miles per hour, kilometers per hour, knots, and meters per second. Accurate and quick, works offline in your browser.
Look up common acronyms and abbreviations from a built-in list. Search by acronym or meaning. Always expanding, no internet needed.
Calculate water and soda ash needed to pre‑soak fabric for tie‑dye. Achieve vibrant, long‑lasting colors.
See how making extra payments reduces tenure and saves interest. Visual graph comparing original vs prepaid amortization. Purely local financial tool.
Displays the national poison control number and basic first steps for common household ingestions. Seek medical help immediately.
Estimate how much agricultural lime or elemental sulfur to add to change soil pH by a target amount. Based on soil type and current pH. Educational.
Estimate the total price after adding US state sales tax. Select state, enter amount, and see breakdown. Simple and quick, perfect for shoppers.
Adjust material types (leaves, grass) to achieve the ideal 30:1 C:N ratio. Improve compost bin performance. Local only.
Search a curated dictionary of modern internet acronyms (IMO, TBH, IYKYK) and slang. Simple offline-capable reference. No tracking.
Compare stick models by length, diameter, and taper. Find the perfect balance for your playing style.
Learn to tie essential knots with step-by-step animated diagrams. Includes bowline, square knot, clove hitch, and more. Pure CSS/JS animation.
Quickly find the final price after a percentage discount. Also works in reverse to find the original price. Handy for budget shoppers.
Compute simple interest and final amount given principal, annual rate, and duration. Also reverse-calculates rate or time. Local only.
Paste a mixed text and get a list of only the emojis found within. Counts each unique emoji. Data cleanliness tool.
Enter length or period to find the other. Visual swinging animation. Quick physics reference.
Schedule your iron supplement away from inhibitors (coffee, calcium). Visual reminder and log.
Based on move size, hours, and crew, estimate appropriate tip per mover. Quick reference.
Find the CAGR of an investment given start and end values over a time period. Instant growth rate.
Select a color in an image and completely remove it or make it transparent. Great for background removal experiments. Local.
Project how your savings and investments grow over time with compound interest. Interactive chart and detailed table. Free and anonymous.
Perform common percentage calculations: find percent of a number, percentage increase/decrease, and more. Simple, fast, and always available for free.
Match your fabric design size to the correct embroidery hoop diameter. Visual guide showing how much fabric margin is left.
Estimate required CFM for your dust collector given machine port size and length. Woodshop aid.
Calculate monthly EMIs for any loan type and see the detailed amortization schedule. Compare different interest rates and tenures with instant results.
Calculate required bags of cement, sand, and gravel for a given concrete volume using standard mix ratios (1:2:4, etc.). Supports metric and imperial.
Test min, max, and step constraints on `<input type='number'>`. See how invalid values are handled. Undocumented behavior.