JSKAPPSIdeas, guides & product news
Notes on browser tools, credits, and getting more done — from the team and our contributors.
Compress images to an exact target file size — in your browser
upload limits are everywhere. Instead of guessing at quality sliders, aim straight for a file-size budget — locally, with real codecs, no upload required. Here's how target-size compression works.
How to make a passport-size photo for free — without uploading it anywhere
Most free passport photo tools want your face on their server first. Here is how to make a correctly sized photo entirely on your own machine, in about two minutes, and check it against the actual specification before you submit it.
Loudness Levelling: Why Dialogue Is Quiet, Ads Are Loud, and Volume Cannot Fix It
You turn it up to hear the dialogue, then an advert nearly takes your head off. No volume setting is right for both, because the problem is the distance between them. Here is what loudness levelling actually does, and how it differs from an equalizer.
"Why was this blocked?” — the feature every ad blocker should have
Most blockers give you a number — '14 blocked'. Fourteen what, by which rule, from which list? JSK Shield shows the exact request, the rule that matched, and the list it came from, then lets you allow just that one thing on just that one site.
How many passport photos fit on an A4 sheet? (And why yours print the wrong size)
The answer is 30 — but only at the right margin, and only if the file you print carries a real print resolution. Here is the arithmetic, the six paper sizes compared, and the reason most home-printed passport photos come out too big.
How to Boost Volume in Chrome Beyond 100% — Without Wrecking the Sound
Your system volume is maxed and the video is still too quiet. Here is how browser volume boosting actually works, how to push a tab past 100% without turning it to mush, and how to tell a safe volume booster extension from one you should not install.
How resellers pull full-resolution product photos from AliExpress and Amazon
Store pages show you thumbnails; your own listing needs the originals. Here's a repeatable workflow for grabbing full-resolution product images from marketplaces — cleanly, and without a hundred right-clicks.
How QA teams smoke-test 200 URLs across staging and production
Every release, someone has to eyeball the key pages on staging, then again on production. Here's how to turn that spreadsheet-and-copy-paste ritual into one saved list you can run in under a minute — on both environments at once.
How to block ads on Chrome without creating an account
Most blockers give you a number — '14 blocked'. Fourteen what, by which rule, from which list? JSK Shield shows the exact request, the rule that matched, and the list it came from, then lets you allow just that one thing on just that one site.
How to download all the images from a web page at once (Chrome)
Right-clicking *Save as* forty times is nobody's idea of fun. Here's how to find and download every image on a page in one pass — with filters, bulk ZIP and custom names — without uploading anything.
URL templating: generating hundreds of links from one pattern
Stop building URL lists in a spreadsheet. One line like example.com/page/[1-50] becomes fifty links — and with value lists and date ranges you can sweep every country, every ID, or every day of a month from a single pattern.
How to open 100 URLs at once in Chrome (without killing your browser)
Middle-clicking a hundred links is miserable, and opening them all at once will freeze your browser. Here's how to open a whole list of URLs in one click — and the two settings that stop 100 tabs from grinding your machine to a halt.
Do Candlestick Patterns Actually Work? How to Test Them on Your Own Chart
Candlestick patterns are taught as universal signals — but their reliability changes with the market, timeframe and trend. Here's what to measure, and how to test which patterns actually work on your chart.