These guides explain the choices exposed by PixelKaro instead of repeating button labels. Each article includes formulas, limitations, or verification steps you can use with other software too.
Image Compression and File Size GuideUnderstand why image size changes, what a KB target can and cannot guarantee, and how to reduce a file without destroying useful detail.How to Resize an Image Without DistortionUse aspect ratios, fit modes, cropping, and pixel dimensions correctly so faces, logos, and documents keep their intended shape.How Browser-Based Image Processing Protects Your FilesLearn what local image processing means, which network requests still occur, and how to verify that a tool does not upload your selected file.How to Check the DPI of an ImageFind an image's stored DPI, verify its pixel dimensions, and calculate effective PPI for the print size you actually need.DPI vs PPI: What Changes Image Quality?Understand printer dots, image pixels, metadata, resampling, and which number matters when you prepare a digital image for print.Image Resolution and Print Size GuideCalculate a practical print size from pixel dimensions and compare the result at 150, 240, and 300 pixels per inch.300 DPI Pixel Dimensions ReferenceUse exact pixel dimensions for common photo and paper sizes at 300 DPI, with formulas for inches and centimetres.Camera Exposure Triangle Guide & Interactive SimulatorMaster Aperture, Shutter Speed and ISO with an interactive real-time camera simulator and practical cheat sheet.Smartphone Camera Pro Mode Guide: ISO, Shutter & FocusLearn how to use manual camera controls on Android and iPhone for cinematic mobile photos and sharp night shots.Portrait Posing Guide: Natural, Confident Poses for BeginnersActionable posing guide for men, women, and couples to look natural, relaxed, and photogenic in front of the camera.Creative Mobile Photography Hacks: Pro Shots with Everyday ItemsTransform household items into creative camera gear. Master water droplet macro lenses, puddle reflections, fairy light bokeh, and prism rainbow flares.Mobile Photo Editing Masterclass: Lightroom & Snapseed Color GradingMaster tone curves, HSL color mixing, selective masking, and cinematic color grading on Android and iPhone using Lightroom and Snapseed.Budget Photography Lighting Guide: DIY 3-Point Studio SetupBuild a professional 3-point lighting setup with key, fill, and rim lights without expensive gear. Practical DIY softboxes, diffusers, and reflector tips.
How the guides are prepared
Technical claims are checked against browser behavior, image-file metadata, reproducible calculations, or primary documentation. Requirements that vary by printer, portal, country, or document are described as variables rather than universal rules.
What the guides do not promise
A file can have the requested dimensions and still be rejected for reasons outside an image tool's control. PixelKaro does not promise government acceptance, invent official file-size limits, or claim that changing a DPI label creates image detail.