Guides
Short, practical guides with worked examples for the jobs people actually come here to do — meeting an upload size limit, working out tax, converting a time, or keeping a document private.
- How to compress a PDF to under 200 KBGet a PDF under a 200 KB upload limit without guessing: what the limit really means, what to try first, and why the text turns blurry or unselectable.
- How to resize a photo or signature to 20 KBMeet a 20 KB or 50 KB image limit on an application form: crop first, pick the right format, and let the tool find the quality that fits.
- How to remove GST from a price, and what CGST, SGST and IGST meanDivide, do not subtract: the right way to find the price before GST, with worked examples, and how CGST, SGST and IGST split the same tax.
- SIP vs lump sum, and what a step-up SIP changesWorked numbers for a monthly SIP, a lump sum and a yearly step-up, so you can see what the return you assume and the time you stay invested really do.
- Why a 1 TB drive shows up as 931 GBNothing is missing from your drive. Decimal and binary units explain the gap, and the same maths explains file-size limits and download sizes.
- How to merge PDFs without uploading themWhy uploading a contract or statement to a merge website is a risk, how browser-based merging avoids it, and how to check a tool is doing what it claims.
- How to convert a meeting time across time zones without mistakesDaylight saving, fixed offsets and ambiguous dates cause most scheduling mix-ups. Convert for the right date, share UTC, and read Unix timestamps.
- What HEIC is and how to convert iPhone photos to JPGWhy your iPhone photos will not open or upload elsewhere, what HEIC is, and how to convert it to JPG or PNG privately in your browser.
- Is white-out in a PDF safe? How to hide sensitive information properlyCovering text with a white box hides it visually but does not remove it. How to tell, and how to get rid of sensitive details for real.
- What is in a photo's EXIF data and how to remove itPhotos can carry your location, device and time. What EXIF contains, who can see it, and how to strip it without touching the picture.