Images / TOOLKIT
Image Compressor
Shrink JPG, PNG and WebP images right in your browser - full control, zero uploads.
Free to use · No account needed
How to use
- Drop an image onto the box or click to browse.
- Adjust quality, maximum width and output format.
- Compare original and compressed sizes live, then download.
Compress JPEG and PNG images without visible quality loss. Reduce page weight, speed up load times and save bandwidth - critical for Core Web Vitals and mobile users. Process one image at a time, preview the result and download it.
Use cases
1. Use case: Speed up your website Compress hero images before uploading to reduce page weight and improve Core Web Vitals without visible quality loss.
2. Use case: Fit email size limits Shrink attached photos so they pass the 10-25 MB attachment limits of most email providers.
Practical tips
Quality and dimensions compound: a 30 percent reduction from resizing plus a moderate quality step often halves file size with no visible change. For web images, target roughly 100–200 KB per hero image and far less for inline images. Compression is lossy — keep the original, because re-compressing an already-compressed file stacks artifacts. Compare before and after at 100 percent zoom on the most detailed region, not the whole preview. The Image Compressor runs entirely in your browser: the data you enter never leaves your device, nothing is uploaded to a server, and the tool keeps working if your connection drops.
Common mistakes
Compression mistakes compound because the damage is invisible at first:
- Re-compressing an already-compressed file — artifacts stack, so always compress from the original.
- Judging quality on the full-page preview instead of 100 percent zoom on the most detailed region.
- Aiming for minimum bytes on every image; a hero image can carry 150–200 KB while inline images should be far smaller.
- Forgetting that dimensions and quality compound: resizing alone often halves the file before any quality change.
Frequently asked questions
Does the Image Compressor send my data anywhere?
No. It runs entirely in your browser — your input is processed on your device and never uploaded. After the page has loaded, compression runs locally; reloading offline is not guaranteed.