Guides & tests
Results from actually running the tools, and step-by-step workflows that combine several of them. Every number comes from measuring it the way the article describes.
- Getting photos ready to print: pixels, aspect ratio and PDF in three stepsA table of the pixels needed for common print and paper sizes, two ways to fit a phone photo to the paper’s aspect ratio, and what to watch when printing images from a PDF.Published 2026-09-19
- Before you post a photo: five steps from checking the location to resizing and compressingHow to check a photo’s hidden location data (Exif), crop out what is in the shot, resize, compress and check again — plus a test showing that the site’s image tools all remove Exif.Published 2026-09-19
- How long should a password be? A brute-force time table, and where the math misleadsA table of brute-force times by length and character type, plus passwords that are weaker than the math says — P@ssw0rd, a name plus birth year, word passphrases — and the fix we made to our strength checker.Published 2026-09-19
- What JPEG quality should you use? We measured 10–100% and WebPWe saved images as JPEG and WebP at quality 10–100% in the browser and measured file size and quality loss (PSNR): why 100% is not worth it, a WebP pitfall, and when re-saving really degrades an image.Published 2026-09-19
- We read all 23 of this site’s barcode formats with this site’s own readerWe generated and decoded 23 formats, from QR and EAN to Codabar, and measured which ones read, why some fail, how much damage QR codes survive and how large each format gets.Published 2026-09-19