Compress images without leaving your browser
Shrink photos for email, forms and websites with a simple quality slider.
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What this tool does
The Image Compressor re-saves your picture at the quality you choose, which usually makes the file much smaller. You pick a quality from 10 to 99 (the default is 80), click one button, and the compressed file downloads straight away. The tool also shows the original and new size so you can see what you saved.
How it saves space: the image is redrawn in your browser and saved again as a JPEG. Lower quality means a smaller file and more visible compression, so try a few settings.
How to compress an image
- Click Upload Image and choose a JPG, PNG or WebP file.
- Move the Quality slider. Around 70–85 is a good balance for photos.
- Click Compress & Download.
- Check the file sizes shown under the tool and open the downloaded image to be sure it still looks good.
Tips for better results
- Photos usually compress well at 70–85% quality with little visible difference.
- Compress once. Re-compressing an already compressed JPEG slowly degrades it.
- If you need an exact width or height as well, use the Image Resizer first, then compress.
- Screenshots with sharp text may look better as PNG than as a heavily compressed JPEG.
Privacy: what happens to your data
This tool runs in your browser, so the content you enter stays on your device and is not sent to Tantool's servers. See the Privacy Policy for the full picture.
Because the image is redrawn and re-saved, extra metadata such as camera details and GPS location is not copied into the new file.
Limitations to know about
- The output is a JPEG. A PNG is only kept as PNG when you set the quality above 95, and that is usually not smaller.
- Transparent areas turn black when a PNG with transparency is saved as JPEG.
- If the image is already small or efficiently compressed, the result can be the same size or even larger, and the tool tells you so.
- Extremely large images (tens of megapixels) may exceed what your browser can handle.
Frequently asked questions
What quality should I choose?
For photos, 70–85 is a good starting point. For web thumbnails you can go lower; for printing, stay higher.
Why did my file get bigger?
Small or already optimised images can grow when re-encoded. Try a lower quality, or keep the original.
Does it keep my photo's location data?
No. The new file is created from the pixels only, so metadata such as GPS location is not carried over.