Image guides
18 articles on the image problems people run into most, and how to solve them.
Troubleshooting5
- Troubleshooting2026-08-01
3 ways to fix a WebP file that will not open
Why a WebP image you downloaded refuses to open, and how to fix it. Convert to JPG, open it in a browser, or install the codec — pick whichever suits your situation.
Read more → - Troubleshooting2026-08-01
How to open iPhone HEIC photos on Windows
What to do when photos copied from an iPhone (HEIC) will not open on Windows. Covers converting to JPG and changing your iPhone's camera setting.
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Why photos lose quality when you send them in a messaging app
Why KakaoTalk, WhatsApp, LINE and similar apps degrade the photos you send, how to send at original quality, and the file size and privacy trade-offs that come with it.
Read more → - Troubleshooting2026-08-01
If your transparent background keeps disappearing
Why saving a transparent PNG turns the background white or black, and how to convert formats while keeping the transparency intact.
Read more → - Troubleshooting2026-08-01
Renaming the extension is not converting
Why changing .webp to .jpg in the file name leaves you with a file that still will not open. The difference between renaming an extension and converting a format.
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Format comparison4
- Format comparison2026-08-01
WebP vs JPG vs PNG vs AVIF: which format should you use?
The differences between JPG, PNG, WebP and AVIF, and how to choose between them. Find the right format for photos, logos, web uploads and long-term storage.
Read more → - Format comparison2026-08-01
Why converting GIF to WebP is worth it
GIF dates from 1987, and its 256-colour limit and large file sizes show it. Here is what you gain by converting to WebP, and what to watch out for.
Read more → - Format comparison2026-08-01
AVIF explained: the next-generation image format
The strengths and weaknesses of AVIF, how browser support looks today, how it compares with WebP, and what to do when an AVIF file will not open.
Read more → - Format comparison2026-08-01
Working with the TIFF files your scanner produces
What makes scanner and fax TIFF files different, and how to convert those large files into the JPG and PNG formats that are easier to work with.
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Reducing file size3
- Reducing file size2026-08-01
How to reduce photo file size without wrecking quality
Three ways to shrink a photo when you hit an email attachment or upload limit. Adjust resolution, then format, then quality, and you keep quality loss to a minimum.
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Managing the size of your phone photos
Why a single phone photo now runs to 5-10MB, and practical ways to keep that under control for storage and sharing.
Read more → - Reducing file size2026-08-01
Resizing photos without losing quality
What actually happens to quality when you shrink an image versus when you enlarge it, and how to keep the loss to a minimum when resizing.
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Web optimization2
- Web optimization2026-08-01
A guide to optimizing blog and website images
How image optimization improves your site's loading speed and search ranking. Recommended dimensions, format choices and file size targets.
Read more → - Web optimization2026-08-01
Convert your WordPress images to WebP and the site gets faster
Images are the most common reason a WordPress site is slow. Here is the practical way to convert them to WebP before uploading and lift your speed scores.
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Size guides3
- Size guides2026-08-01
Social media image sizes, all in one place
The image sizes you actually need — Instagram feed and stories, YouTube thumbnails, blog featured images — and the fastest way to match them.
Read more → - Size guides2026-08-01
Product photos for online stores: sizes and file sizes
Recommended product image sizes for online marketplaces, and how to optimize your images so the product page does not crawl.
Read more → - Size guides2026-08-01
Profile picture sizes, all in one place
Recommended profile picture sizes for the major services, and how to make one that still looks right after it is cropped into a circle.
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