Guides
- Why an online form rejects your photo (and how to fix it)The usual reasons a job, exam or ID form refuses a photo or signature: file size, pixel size, format, background and blur, with the fix for each.
- How to take a form photo with your phoneSimple steps for a clear, well-lit photo for an online application, without a studio: light, background, framing and what to avoid.
- KB or KiB: how big is “50 KB” on a form?Some systems count a KB as 1,000 bytes, others as 1,024. Here is why it matters near a limit and how this tool makes sure your file passes either way.
- How to reduce photo size in KB on Android or iPhoneStep by step: make a phone photo fit a form’s KB limit in the browser, without installing an app. Works on Android and iPhone.
- Photo ka size kam kaise karein (KB mein): step by stepPhoto ko KB mein kaise karein: a simple guide in easy English and Roman Urdu to make a phone photo fit a form’s KB limit, free, in the browser.
- What is DPI? A plain guide for forms and printingDPI and PPI explained: how pixels, inches and DPI relate, why forms ask for 300 DPI, and worked examples for common photo sizes.
- Passport photo size in pixels: common sizes at 300 and 600 DPIPixel sizes for commonly used passport-style photo sizes (35 × 45 mm, 2 × 2 in, 33 × 48 mm, 40 × 50 mm) at 300 and 600 DPI, and how to make one.
- How to get a clean signature with a white background from a phone photoSign, photograph and clean up a signature so the paper is white and the ink is dark, then resize it to your form’s size and KB limit.
- Why a photo gets blurry after compressing, and what helpsHow JPEG compression reduces file size, why a small KB limit causes blur and blocky edges, and practical ways to keep the face clear.
- How to convert a photo to JPG for an online form (HEIC, PNG, WebP)Why forms ask for JPG, how to get a JPG from a PNG or WebP image, and how to stop an iPhone from saving photos as HEIC.
- How to convert cm, mm and inches to pixelsThe formula for converting centimetres, millimetres and inches to pixels at any DPI, with a table of common sizes at 72, 96, 150 and 300 DPI.
- Photo and signature size for online forms: what it means and a checklistWhat “size” means on a job, exam or admission form (pixels, KB, format, background), how to read the rule, and a checklist before you submit.
- KB and MB explained: how to read a file sizeHow KB and MB relate (1 MB = 1000 KB, and the 1024 KiB note), how to convert, and how to check a photo’s file size on Android, iPhone, Windows and Mac.