Resizing, cropping and compressing photos: a practical guide
Every website, college portal and chat app has its own idea of the right picture size. This guide explains how pixels, file size and cropping relate, so you can make a picture fit the rules in one go and still look good.
Common uses
Application forms and exam portals
Portals often ask for a photo of 3.5 x 4.5 cm under 50 KB and a signature under 20 KB. Choose the preset, crop to the face, set the target KB and download.
Profile pictures
Crop to a square so a face is not cut off by the round frame many apps apply, then resize to 400 or 800 pixels.
Websites and blogs
A 12-megapixel photo is far too large for a web page. Resize to the display width (for example 1200 px) and export as WebP or JPG.
E-mail and chat
Reduce a picture to a few hundred KB so it sends quickly on mobile data and does not get recompressed badly by the app.
Social media
Use the square, portrait and landscape presets to avoid automatic cropping that cuts off heads or text.
Documents
Shrink scanned ID pictures or certificate photos before attaching them to an online application.
Pixels versus file size
Pixels describe how big the picture is (for example 1200 x 800). File size in KB describes how much storage it needs. A smaller pixel size usually means a smaller file, but quality settings and picture content matter too: a detailed photo takes more space than a plain one.
How target-size compression works
The tool encodes the picture at high quality, checks the size, and lowers the quality in small steps until the result is under your limit. If lowering quality alone is not enough, it reduces the pixel size slightly. The preview shows the real file size before you download.
Cropping before resizing
Crop first to remove empty space, then resize. A tighter crop keeps important details bigger at the same pixel count, which looks better and compresses better.
Choosing a format
JPG is the safest choice for photographs. PNG is lossless, best for text, screenshots and logos. WebP makes the smallest files for the web, but some older portals do not accept it, so use JPG for official uploads.
Orientation and EXIF
Phones store rotation as hidden data. The tool applies it, so a portrait photo does not turn sideways, and it removes location data from the downloaded copy.
Privacy
Everything happens in your browser. The picture is not uploaded, so ID photos and family pictures stay on your device.
Troubleshooting
The file is still over the limit
Choose JPG, lower the pixel size a little (for example 600 x 800), or use a plain background; busy backgrounds compress poorly.
The picture looks blurry
You asked for a very small file. Increase the KB target or the pixel size, and avoid enlarging a small picture - enlarging cannot add detail.
The portal rejects my file
Check the required format (often JPG), the exact pixel dimensions and the maximum size. Some portals also reject files with unusual names; use simple letters and numbers.
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The whole site - menus, buttons, guides and messages - can be switched to 55 languages, including English, Hindi, Bengali, Tamil, Telugu, Marathi, Gujarati, Kannada, Malayalam, Punjabi, Odia, Assamese, Nepali, Urdu, Arabic, Spanish, French, German, Portuguese, Italian, Russian, Turkish, Japanese, Korean and Chinese. Use the language menu in the top bar; your choice is remembered, and the file formats and tools work exactly the same in every language.