Guides to getting images right
Each guide answers one question people often get stuck on, works through real numbers, cites official sources and links to the tool that does the job.
- Compression · 11 min readHow to compress images for websites, email and upload formsQuality settings, target sizes and resizing first, with worked numbers.
Tools: Compress, Resize, JPG/PNG → WebP
- Formats · 10 min readHEIC explained: what it is and how to open iPhone photos anywhereWhy your iPhone saves .HEIC files, and the easy ways to open or convert them.
Tools: HEIC → JPG, Compress, EXIF / location
- Formats · 12 min readJPG vs PNG vs WebP vs AVIF: which image format should you use?Lossy or lossless, transparency, browser support and real file sizes compared.
Tools: JPG/PNG → WebP, JPG → AVIF, PNG → JPG, Compress
- Sizes · 10 min readImage sizes for social media, checked against each platform’s help pagesPixel sizes and aspect ratios for posts, profiles, covers and link previews.
- Privacy · 11 min readWhat your photos reveal, and how to remove location data before sharingGPS, serial numbers and timestamps hidden in EXIF, and how to strip them.
Tools: EXIF / location, HEIC → JPG, Blur & pixelate
- QR codes · 10 min readDo QR codes expire? Static and dynamic codes explainedWhy some codes stop working, how to make one that won’t, and how big to print it.
- Web · 9 min readFavicon sizes explained: the files your website actually needsICO vs PNG vs SVG, Apple touch icons, manifest icons and Google’s rules.
- Printing · 10 min readDPI vs pixels: how big can you print a photo?Pixels, PPI and DPI untangled, with a print-size table you can use.
Tools: Resize, Image → PDF, SVG → PNG
How we write guides
Guides are written by the PixWrench team and checked against primary sources: format specifications, standards bodies, browser documentation and the platforms’ own help pages. Where we quote file sizes, they were measured with the same codecs the tools use, on images we describe. Guides explain how things work and when a choice matters; if something looks out of date, the contact page explains how to tell us, and corrections are dated in the changelog.