Resize image in KB (target file size)
KB refers to file size, not dimensions. Use compression and downscaling to hit size limits like 100KB/200KB.
How to hit a KB target
- Lower quality slightly (JPG/WebP).
- Downscale dimensions if needed.
- Use WebP for best size/quality ratio.
Common limits
- 100KB for forms and uploads
- 200KB for email attachments
If quality collapses, reduce dimensions instead of over‑compressing.
3 steps (using this tool)
- Upload your image to the compressor.
- Set a target size (KB) and adjust quality.
- Downscale if needed and export locally.
Need pixel resizing too?
Resize dimensions first, then compress to hit the KB target.
Related guides
Workflow
Resize image online →Use this when you need to set dimensions before compression, so file-size reduction starts from the right canvas.
100KB
Compress to 100KB →Use this when the upload limit is strict, so the file is tuned to a 100KB target after resizing.
200KB
Compress to 200KB →Use this when the form allows a slightly larger file, so quality can stay higher while still meeting the cap.
Pixels
Resize in pixels →Use this when the platform specifies exact dimensions, so the image is sized correctly before you trim KB.
Converter
Image size converter →Use this when you need to switch between dimensions and file-size limits, so you can choose the right conversion path.
FAQ
KB refers to file size or dimensions?
KB refers to file size, not width/height.
Quick tip: Use compression and downscaling to hit a KB target.
Common mistake: Changing only dimensions without compression—file size may stay large.
How do I resize image to 100KB or 200KB?
Lower quality slightly, then downscale if needed.
Quick tip: WebP usually hits KB targets with better quality than JPG.
Common mistake: Dropping quality too far—results look blocky.
Is there a KB size converter?
Yes—use the image compressor with a target size.
Quick tip: Adjust quality first, then dimensions.
Common mistake: Using PNG for photos—file size stays large.
Do you upload my images?
No. Processing happens locally in your browser. Your files are not uploaded.
What size should I use?
Use the recommended size.
Which export format should I use?
JPG for photos, PNG for text/logos or transparency, WebP for smaller files (if supported).
Crop vs Pad — what is the difference?
Crop fills the target size (may cut edges). Pad fits the whole image and adds background/space.
How do I protect text and logos?
Keep important content centered and avoid placing critical text at the edges.
Can I batch resize?
Yes. Use the Batch Resizer to apply the same size to many images.