Guides
Real limits, real formulas
Everything here is written around the same honesty rule as the tools: published requirements, actual measured numbers, and no promises that compression can’t keep. Every guide links the tool that does the job.
October 20, 2026
Compress a scanned PDF properly
Scanned PDFs compress beautifully; digital-text PDFs usually don't. Here's why, and the honest workflow for each — including what KB you can really expect.
pdfscanned documentsOctober 20, 2026
Passport photo dimensions in pixels and KB
Standard passport photo physical sizes translated into pixels at real-world resolutions, plus what KB band a good passport JPEG actually lands in.
passportphoto resizeOctober 20, 2026
Reduce a photo's size in KB on your phone
How to shrink photos to a target KB size in a mobile browser: what cameras produce, why messaging-app “compression” is not a workflow, and what actually works.
mobilephoto resizeOctober 20, 2026
SSC CGL photo and signature: sizes that pass
The exact photo and signature requirements SSC application portals ask for, why rejections happen around file size, and how to hit the caps honestly in your browser.
exam formspdfphoto resizeOctober 20, 2026
UPSC application photo and signature sizes
Dimensions, KB bands and scan quality for UPSC application photos and signatures — plus the compress-and-verify workflow that gets uploads through the first time.
exam formsphoto resizeOctober 20, 2026
What compression actually does to your files
Lossy vs lossless, image vs PDF, the trade-offs nobody names, and a checklist for verifying any compressed file before you rely on it.
conceptspdfquality