SnapFit guides

Short, practical write-ups on the problems SnapFit's tools solve — written by the person who builds and maintains them. Each guide explains the "why" behind the numbers so you can fix a rejected upload yourself.

How to compress a photo to an exact KB size without ruining it

Why a photo is bigger than a form allows, and the order of fixes that gets it under the limit while keeping your face clear: dimensions first, then JPEG quality.

How to make a PDF smaller without making it unreadable

Why PDFs get large, which kinds shrink well, and what a browser-based compressor does to your pages — including the trade-off most guides leave out.

How to make a QR code that actually scans

A practical guide to QR codes for websites: how big to print them, which colours scan, how much logo is safe, and how error correction makes logos possible.

White-background product photos: a checklist for online sellers

What marketplaces generally expect from listing photos, how to shoot a product at home so the background cleans up easily, and the mistakes that get listings flagged.

Is it safe to upload your photo and ID to an online resizer?

How online photo and PDF tools handle your files, how to check whether a site uploads them, and exactly what SnapFit does and does not send off your device.

Looking for exact sizes instead? See the exam photo & signature size chart.