Local processing · your files never leave this device
Compress Image to 300KB Online
Automatically compress JPG, PNG and WEBP images to 300KB or less while keeping the best possible quality. Free, unlimited and processed entirely in your browser.
- No upload — runs in your browser
- Batch of 30 files + ZIP download
- Free and unlimited, no sign-up
Drag & drop images here
JPG, PNG, WEBP, HEIC, GIF, BMP or AVIF · up to 30 files at once
Files are processed on your device and never uploaded
When do you need a 300KB image?
300KB gives you enough headroom to keep fine detail while still satisfying most upload rules. It is a good choice for scanned documents where text must stay readable.
- Scanned certificates and mark sheets
- Property or vehicle document uploads
- High detail photos that still need a size cap
How to compress an image to 300KB
1. Add your images
Drag and drop JPG, PNG, WEBP, HEIC, GIF, BMP or AVIF files — or select them from your device. Nothing is uploaded.
2. Set the target size
Pick 300KB or type your own limit. Advanced options let you set dimensions, format and quality priority.
3. Download the result
Every file shows its before and after size. Download them individually or grab a ZIP of the whole batch.
Why this compressor actually reaches your limit
Exact target file size
Say “200KB” instead of guessing a quality percentage. A binary search finds the highest quality that still fits your limit.
Batch compression
Add up to 30 images, optimize them in one run, and download everything as a single ZIP archive.
100% private
Images are decoded and re-encoded on your own device with the Canvas API. Nothing is uploaded to any server.
Automatic resizing
When quality reduction alone cannot reach the target, pixel dimensions are reduced step by step until it fits.
Need a different file size?
Every size below uses the same optimizer with a different preset target.
Your images never leave your device
Compression runs in a Web Worker inside your browser using the HTML5 Canvas API. There is no upload step, no temporary storage and no server-side copy — which is exactly why passport photos, ID scans and exam documents are safe to process here. Read the privacy policy.
Frequently asked questions
Is 300KB good enough for scanned documents?
Usually yes. For scans, keep the pixel dimensions as high as possible and let quality drop instead — text stays much more readable that way. Turn off “Resize if needed” if your document is already under 2500px wide.