Image Guides & Tutorials
Everything you need to resize, compress, convert, and optimize images — written for humans, not algorithms.
How to Resize an Image Without Losing Quality
Learn the best techniques to resize images while preserving sharpness and detail.
Explainers
6 guidesWhy Photos Lose Quality When You Send Them on WhatsApp
WhatsApp re-encodes every photo you send — and there is a way to bypass it entirely.
Why Your iPhone Photo Is Sideways on Windows But Fine on Your Phone
One number in the file's metadata explains a whole family of rotation bugs.
Why Your PNG Is Ten Times Bigger Than the Same Photo as a JPG
The two formats are not competing — they are solving completely different problems.
Why Does Every Government Form Want a Photo Under 100KB?
Storage economics, slow connections, and specifications copied between institutions.
Screenshots and Photos Need Opposite Treatment
Almost every rule about formats and compression reverses depending on which you have.
What Actually Happens to Your Photo After You Press Upload
It is decoded, stripped, resized and re-encoded several times before anyone sees it.
Resizing
7 guidesHow to Resize an Image on Mac with Preview
Resize a photo in Preview, preserve its proportions, and distinguish pixel dimensions, resolution and file size.
How to Resize an Image in Paint Without Stretching It
Use Paint to resize an image by pixels or percentage, preserve its shape, and save a separate copy for sharing.
How to Resize an Image on iPhone for an Upload
Change an iPhone photo’s dimensions or file size, choose a compatible format, and save the correct copy for an online upload.
How to Resize Pixel Art Without Blurring
Enlarge pixel art with nearest-neighbor scaling, preserve the palette and transparency, and avoid uneven pixels in sprites and icons.
How to Resize a Photo to Email It
How Gmail, Outlook, and iPhone Mail handle image size — and how to shrink a photo before you attach it.
How to Reduce Image Size in KB (20KB, 50KB, 100KB, 200KB)
Choose a file-size ceiling, compress automatically, and verify the result for your upload.
How to Bulk Resize Multiple Images at Once
Save time by resizing dozens of images to the same dimensions in a single step.
Compression
1 guideSocial Media
6 guidesYouTube Thumbnail Size: Resolution, Ratio and Upload Limits
Current YouTube thumbnail dimensions, mobile and desktop upload limits, and practical steps to resize a thumbnail without stretching it.
YouTube Banner Size and Safe Area: Avoid Cropped Text
Prepare YouTube channel art at the recommended size, understand the minimum dimensions, and keep text inside a safe central area.
Etsy Listing Photo Size: Cropping and Sharp Product Photos
Prepare Etsy listing photos with enough detail, consistent framing and thumbnails that keep your product visible.
Shopify Image Sizes: Products, Banners and File Weight
Choose Shopify image dimensions for product photos and theme banners, then balance detail, cropping and file weight.
How to Resize Images for Instagram (All Post Types)
The exact pixel dimensions for Instagram posts, stories, reels, and profile photos.
How to Resize Images for LinkedIn (Profile, Banner, Posts)
Get the right image sizes for your LinkedIn profile photo, cover photo, and posts.
Conversion
1 guideFormats
3 guidesHow to Change Image DPI: Pixels, Print Size and 300 DPI
Understand DPI metadata, check image resolution, and calculate the pixels you need for a print without confusing DPI with image detail.
Image Formats Explained: JPG vs PNG vs WebP vs AVIF
A complete guide to choosing the right image format for every use case.
WebP vs JPG vs PNG — Which Format Should You Use?
Compare the three most common web image formats and when to use each one.
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