Guides

How Image Compression Works

Lossy vs. lossless, why format matters, and how to get a smaller file without guessing.

How to Reduce Photo Size in KB for Online Forms

Resize before you compress, the 1,000-vs-1,024 KB trap, and what to do when a photo is under a minimum size.

PNG vs JPG: Which Format Should You Use?

Photos, screenshots, logos and transparency, with measured file sizes and where WebP fits.

Image Format Compression Benchmark: JPEG vs PNG vs WebP vs AVIF

Real measured file sizes across four image types and every major web format, with full methodology.

How to Resize an Image Without Stretching or Blurring It

Step-by-step on Windows, Mac, phones and online, plus exact sizes and crop vs. fit vs. stretch.

What EXIF Data Is, and How to Remove It

What's actually hiding in a photo file, and what removing it does and doesn't fix.

How to Tell If Compression Hurt Your Photo's Quality

What PSNR measures, how to read a dB score, and when to trust it versus your own eyes.

Image Size Guide for Social Media, Favicons, and App Icons

Why every platform and icon context wants a different exact size.

How to Compress Images Without Uploading Them

What "processed locally" actually means, and how to verify it before trusting a tool with a sensitive photo.

How to Reduce Image Size on Android

Built-in options first, and what to reach for when you need an exact file-size number.

How to Reduce Image Size on iPhone

Cropping, Mail's size picker, HEIC vs. JPG, and when to use a browser tool instead.