Compress Image Online Free
Shrink image file sizes without visible quality loss.
Big images slow down websites, bounce back from email, and eat phone storage. This free image compressor shrinks JPG, PNG, and WebP files right in your browser. Drag in a photo, move the quality slider, and watch the before and after sizes update. You pick the balance between file size and looks, then download the result. Nothing is uploaded, so private photos stay on your device. It is a fast fix before posting images, sending files, or uploading to a website.
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About Image Compressor
Images are usually the heaviest part of a web page, and heavy pages rank worse, convert worse, and cost mobile visitors data. Compression shrinks the file by discarding visual detail your eyes won't miss, and with the quality slider you control exactly how aggressive that trade-off is, watching the before-and-after sizes update as you go.
The practical recipe: photos become JPEG or WebP at 70–80% quality, which often halves the file with no visible change; graphics with transparency stay PNG (the slider doesn't apply to lossless PNG; convert photo-like PNGs to WebP instead for real savings). Dimensions never change, and there are no watermarks.
Always compress from the original, not from an already-compressed copy, recompressing a JPEG stacks artifacts in a way one careful pass doesn't. Keep your masters archived, compress the copies you ship, and give text-heavy images extra scrutiny at lower qualities, where artifacts show first.
How to use Image Compressor
- Choose an image or drag it into the box.
- Move the quality slider to set the balance of size and looks.
- Click Compress to shrink the image.
- Download the compressed file and compare the sizes.
Why use this tool?
- Live before/after size comparison
- Quality slider for fine control
- No watermarks
Tips for best results
- Start at 75-80%: for photos this usually halves the file size with no visible difference.
- Use WebP for photos: it beats JPEG at the same quality, convert photo-like PNGs to WebP for the biggest savings.
- PNG ignores the slider: PNG is lossless, so adjust quality only for JPG and WebP output.
- Compress from originals: recompressing an already-compressed image stacks artifacts, always start from the master.
- Check text and edges: zoom into text overlays and sharp edges at low quality settings, where artifacts appear first.
- Dimensions stay the same: compression shrinks file size only, use the Image Resizer if you also need smaller dimensions.