Compress Image
Reduce image size automatically or to a KB/MB target.
Compress Image to KB or MB Online
Compress Image reduces the byte size of JPG, PNG, and WebP files directly in your browser using iterative quality search and intelligent resolution scaling when a strict KB or MB ceiling is specified.
Supported formats: JPG · PNG · WebP · Processing: 100% browser-local HTML5 Canvas & Blob APIs
How to use Compress Image
- Select or drag your JPG, PNG, or WebP image into the Compress Image upload box.
- Choose Auto compression for balanced visual quality, or select "Compress file to" and enter your exact KB or MB target.
- Select an Output format (choose JPG or WebP when aiming for strict small KB targets).
- Click Compress, inspect the actual output size and percentage saved, and click Download.
Practical use cases
- Meeting strict 20 KB, 50 KB, or 100 KB photo upload limits on recruitment, exam, and visa portals.
- Shrinking high-resolution smartphone photos before attaching them to emails or web forms.
- Optimizing hero banners and product images into lightweight WebP files for faster page loads.
Common problems & solutions
Solution: PNG is a lossless format and cannot compress photographs aggressively. Switch the Output format dropdown to JPG or WebP to reach targets like 20 KB or 50 KB.
Solution: Crop unnecessary borders around the subject first so the encoder spends all available bytes on the important area.
Are my images uploaded to AJN Buzz?
No for this tool. Processing runs in your browser and no sign-in is required.
Can I target a specific file size?
Yes. Choose target mode and enter a KB or MB limit. AJN Buzz aims for an at-or-below result.
Can Compress Image guarantee an exact KB file size?
Browser image encoders compress in discrete quality steps, so the tool aims for the highest-quality file at or below your requested KB ceiling and displays the exact resulting byte size before download.
Which format achieves the smallest file size?
WebP and JPG achieve the smallest file sizes for photographs. Use JPG when an application portal specifically requires .jpg or .jpeg uploads.
Does compression reduce pixel dimensions?
In Auto mode, pixel dimensions stay unchanged. In Target KB mode, the tool tries quality adjustment first and only scales dimensions down if the target cannot be met at the quality floor.
Overview · Compress Image
Compress JPG, PNG or WebP with quality search and dimension fallback when a strict file-size limit is selected.
Tool preview