Browser Speed Test - Online Measure Download/Upload
Measure your internet connection speed by downloading and uploading a small test file. Works from your browser.
UD5 Toolkit
Measure latency to servers worldwide. Compare response times across multiple targets simultaneously.
Browser-based HTTP ping — measures TCP round-trip time via resource requests.
Measure your internet connection speed by downloading and uploading a small test file. Works from your browser.
Quickly estimate your internet connection speed by downloading a small test file. See class and recommendations.
Enter a URL and click to check if it's reachable from your browser (CORS-limited, uses no-cors fetch). Quick manual test. Local only.
Measure your typing speed in words per minute and accuracy. Random word prompts. Compare results over time. No data sent.
Paste text to calculate the estimated reading time based on your WPM. Set speaking time too. Perfect for speeches.
Enter a URL and get a rough client-side performance simulation: request count, DOM size, and potential speed tips. No real Lighthouse.
Test how your page loads under slow, 3G, or offline conditions by intercepting fetch and applying delays. No DevTools needed.
Morse characters flash on screen; you must tap them correctly on a single button. Points for accuracy and speed. Learn Morse in a fun way.
Keep track of a tennis match: points, games, sets, and deuce. Supports tiebreak. Great for friendly matches. Local.
Set launch angle, initial speed, and height. See the trajectory, max height, and range plotted on a canvas. Learn kinematics.
Enter a URL and view it in three iframes: mobile, tablet, and desktop side‑by‑side. Quick responsive check.
Enter pins per roll and calculate total bowling score including strikes and spares. Supports 10 frames. Learn scoring rules visually.
Paste a Content‑Security‑Policy header and get a human‑readable breakdown. See potential risks and suggestions.
Analyze letter/symbol frequency with an interactive bar chart and heatmap. Useful for breaking simple ciphers, linguistics, and SEO keyword analysis. Local processing.
List assignments with estimated minutes. See total time and break into Pomodoro sessions. Stay motivated.
Compare text‑rendering: auto, optimizeSpeed, optimizeLegibility, geometricPrecision. See kerning and ligature changes live.
Request permission and detect when the user is idle (away from keyboard). See screen lock state. For native‑like apps.
Tap any key multiple times. Shows average BPM, standard deviation, and a visual metronome beat. More accurate than simple tap.
Estimate hiking time using Naismith's rule (distance + elevation gain). Adjust for terrain and fitness. Plan your outdoor adventure.
Simulate a PWA receiving shared text, links, and images. Test the Web Share Target API without a server.
If your device has a barometer, read the pressure and see trend analysis for short-term weather prediction. Fully local sensor access.
Check if the current page can be loaded offline by examining the service worker cache. Developer tool for PWAs.
Enter megapixels and desired DPI to see the maximum print size without upscaling. Quick quality check.
Paste text and get a rough analysis of its emotional tone (happy, sad, angry, etc.) based on keyword matching. Local.
Based on desired annual income and billable days, calculate your minimum day rate. Don't undercharge.
Convert torque units between Newton-meter, foot-pound, inch-pound, and more. Essential for mechanics and engineers. Instant local conversion.
Paste text to compute reading ease and grade level using Flesch-Kincaid, SMOG, and ARI. Improve your writing clarity. All in browser.
Enter hole saw diameter and material to find the recommended RPM and feed pressure. Prevent burning and kickback.
Compute multiple readability scores (Flesch Reading Ease, Grade Level, ARI, SMOG). Paste any English text and see which grade level it's suitable for. Local.
Test the Web Share API by sharing text, links, and files directly from the browser. Check compatibility and see example code.