Resize image to specific KB size

Need an image exactly under 50KB, 100KB, or 200KB? MiniPx helps you hit precise file size targets for any upload requirement.

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Open KB Size Resizer →

Choose your target size: 10KB, 20KB, 50KB, 100KB, 200KB, 500KB, 1MB

Resize Image to Specific KB Size | MiniPx — Free, Fast & Private

Many upload forms require images under a specific file size — 50KB for government exams, 100KB for form uploads, 200KB for profile pictures, 1MB for email attachments. MiniPx lets you target any specific KB limit with precision.

The approach combines compression and dimension reduction. MiniPx shows you the exact file size after processing, so you can adjust settings until you hit your target. Start with Smart preset and 800px width, then adjust up or down.

Quick reference for common targets: For under 50KB, use JPEG + Tiny + 800px. For under 100KB, use JPEG + Smart + 800px. For under 200KB, use JPEG + Smart + 1280px. For under 1MB, use JPEG + Smart + 1920px.

The real-time size display makes it easy to iterate. If your first attempt is 120KB and you need under 100KB, reduce the width one step or switch from Smart to Tiny. Each adjustment shows the new size immediately.

MiniPx processes everything locally in your browser. Your images never leave your device — ideal for compressing identity documents, exam photos, and sensitive uploads to specific size requirements.

How it works

Upload your image: Add the image you need to resize to a specific KB target.
Choose your target size: Use preset sizes (50KB, 100KB, 200KB) or target a custom size using compression and width controls.
Adjust settings: MiniPx shows the exact output size. Adjust format, preset, and width until you hit your target.
Download sized image: Verify the file size meets your requirement, then download.

Frequently asked questions

How do I get an image to exactly a specific KB?

Use JPEG format and adjust the compression preset and max width. MiniPx shows the exact output size. Start with Smart/800px and adjust: increase width or use Gentle for larger files, decrease width or use Tiny for smaller files.

What settings for under 50KB?

JPEG format, Tiny preset, 800px max width. If still over 50KB, reduce to 640px. This hits the target for virtually any source image.

What settings for under 100KB?

JPEG format, Smart preset, 800px max width. Most photos compress to 60-120KB with these settings. Switch to Tiny if needed.

What settings for under 200KB?

JPEG format, Smart preset, 1280px max width. This produces files of 100-250KB for most photos. Good for profile pictures and document uploads.

Can I target an exact KB number?

MiniPx does not target an exact number, but shows you the output size in real time so you can adjust settings iteratively. Typically 2-3 adjustments are enough to hit any target.

Why does the same settings produce different sizes for different images?

Image content affects compression efficiency. Simple images with few colors compress more than complex photos with lots of detail. A portrait compresses differently than a landscape.