Image editing guides, explained simply
Practical guides by Ashish Kathiriya, each linked to a free tool that does the job in your browser.
How to Crop a Photo to Any Size Without Losing Quality
Crop to the right aspect ratio first, then resize to the exact pixels. Worked examples for 1000×1000, 1200×800 and 1080×1350, plus how to avoid blurry crops.
What Is Image Resolution? Pixels, DPI and PPI Explained Simply
Image resolution explained in plain language: what pixels and megapixels are, how PPI links pixels to print size, what DPI really means, and why 300 DPI is not magic.
How to Change Image Resolution Online: Pixels, DPI and PPI Step by Step
Work out whether you need more pixels or just a different DPI value, then change it: resize for web and forms, set PPI for print, and upscale only when you must.
Passport Photo Size in Pixels: India, US, UK, Canada and Schengen
Passport photo sizes in mm and pixels for India, the US, UK, Canada and Schengen visas, how to convert them, and how to make your own photo at home.
How to Resize a Photo to 3.5 × 4.5 cm Online
3.5 × 4.5 cm is 413 × 531 pixels at 300 DPI, a 7:9 portrait. Pixel sizes at every DPI, inches, and a crop-then-resize method that never stretches your face.
Photo and Signature Size for Online Forms: KB, Pixels and Format
Typical photo and signature limits for Indian exam and government forms, and how to hit an exact KB and pixel size without a blurry or rejected upload.