Compress Image to 300KB
Shrink any image to under 300KB without leaving your browser. Free, private, and no upload required.
Drop images here
JPG, PNG, WebP, HEIC, GIF, BMP, AVIF, TIFF, ICO
Up to 10 files · 25 MB each · 80 MB total
Files stay on your device40–80% Smaller
Typical JPEG reductions with visual quality preserved at quality 66+.
Quality Slider
Fine-tune compression from 1–100 — see estimated file size before downloading.
No Upload
Compression runs in your browser. Your images never hit a server.
How to
How to Compress an Image to 300KB
- Click "Choose Files" or drag and drop the image you want to shrink.
- Leave the target set to 300KB — the compressor finds the highest quality that still fits.
- Download your compressed image once the size is reached.
Why 300KB?
When you need an image under 300KB
Product photos and gallery images on speed-sensitive sites.
How the target is hit: the compressor re-encodes your image several times, searching for the highest quality that still lands under 300KB. Only if that is not enough does it also reduce the pixel dimensions — so you keep as much detail as the limit allows.
FAQ
Frequently asked questions
How do I compress an image to exactly 300KB?
Drop your image above. The compressor repeatedly re-encodes it, searching for the highest quality setting that still lands under 300KB. If the target is very small for the image's dimensions, it also scales the image down until it fits.
Are my images uploaded to a server?
No. Compression runs entirely in your browser using Web Workers and Canvas. Your files never leave your device — you can confirm zero network requests in DevTools.
Will compressing to 300KB ruin the quality?
The tool always keeps the best quality that fits, rather than dropping straight to the lowest setting. For a typical photo, 300KB is reached mostly by reducing JPEG quality; only when that is not enough are the pixel dimensions reduced.
Which formats can I compress?
JPG, PNG, WebP, HEIC, AVIF, TIFF, GIF, and BMP can all be read. Output is JPG by default, which gives the smallest file for photographs.
Is there a limit on how many images I can compress to 300KB?
No. The tool is free with no signup and no watermark. Batch several images at once and download them together.
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