Guides
Short, practical explanations that go with our tools.
- How to Reduce Image File Size Without Losing QualityA practical guide to making photos smaller: resize first, choose the right format, find the best quality setting, strip metadata, and hit an exact KB limit.
- JPG vs PNG vs WebP: Which Image Format to Use?Compare JPG, PNG and WebP: compression, transparency, file size, browser support and when each one is the right choice. With a decision guide and code.
- Passport Photo Size Requirements by CountryCompare passport and visa photo sizes for the US, UK, Canada, India, Schengen and China: millimetres, head size, background, pixels and file limits, with sources.
- DPI, PPI and Print Size ExplainedWhat DPI really means, how pixels and inches relate, how many pixels you need for 4×6, A4 and passport prints, and why 72 DPI vs 300 DPI changes nothing on screen.
- Photo and Signature Upload Errors: Pixels, KB, FormatWhy a form rejects your photo or signature, and how to fix it: read the requirement, match pixels, kilobytes and format, and avoid the common upload mistakes.
- What Is EXIF Data? Remove It and Protect PrivacyEXIF data can reveal where and when a photo was taken. Learn what it contains, who can see it, and how to remove it on Windows, Mac, iPhone and Android.
- How to Take a Passport Photo at Home (Step by Step)A practical guide to taking a passport or visa photo with a phone: light, background, distance, posture, checks, resizing and printing, plus common mistakes.