Photo Size Guides

Practical, plain-language guides to preparing photos and signatures for online forms.

• How to Compress a Photo to 20 KB, 50 KB or 100 KB — A practical guide to shrinking a photo to an exact file size for online forms — without making it blurry, and without uploading it anywhere.
• Passport and ID Photo Sizes Explained: mm, Inches, Pixels and DPI — Why photo requirements are given in millimetres or inches, how they convert to pixels, and how to prepare a correctly sized passport or ID photo at home.
• How to Scan and Resize Your Signature for Online Forms — Get a clean, correctly sized signature image: how to capture it, remove the empty space and background, and meet pixel and KB limits.
• JPG vs PNG vs WebP: Which Format Should You Use? — A plain-language comparison of the three common image formats and which one to pick for forms, documents, signatures and the web.
• Pixels, DPI and KB: What Online Forms Actually Ask For — Dimensions, resolution and file size are three different things. Learn what each one means so you can meet any photo requirement first time.
• Before You Upload: A Checklist for Application Photos — Avoid rejected applications. Check these points before uploading a photo or signature to any online form.