Compress Image to a Target Size in KB

Job portals, university applications, government websites and exam registrations often reject photos and scans larger than a fixed size such as 50 KB or 200 KB. Ordinary compressors make you guess the quality setting. Here you type the size you need and the compressor finds the best quality that fits automatically, for one image or a whole batch.

Common uses

• Meet photo and signature size limits on application and exam forms.
• Attach images to emails or chat apps with strict size caps.
• Upload product photos to marketplaces with file limits.
• Reduce scans of ID documents for online verification.

Tips for best results

• Crop away borders first – fewer pixels means better quality at the same size.
• Set a maximum width when the portal also limits pixel dimensions.
• Use KB (1024 bytes) for most forms; choose kB (1000 bytes) only if the site says so.
• WEBP gives better quality per KB if the site accepts it.

KB versus kB

Strictly, 1 kB is 1,000 bytes and 1 KiB is 1,024 bytes, but most websites and operating systems call 1,024 bytes a KB. The default uses 1,024, so a 50 KB target means at most 51,200 bytes. If a form rejects the file by a whisker, switch the unit or enter a slightly lower target.

Quality first, then size

Lowering JPEG quality removes fine detail that the eye barely notices, while shrinking dimensions makes everything smaller. The compressor therefore keeps your original resolution as long as quality stays at an acceptable level and only scales down when necessary, reporting the final quality and dimensions for each image.

Your files stay local

Compression runs in your browser; photos of IDs and certificates are never uploaded.