Compress Images Without Uploading Them
Large image files make websites slower, email attachments harder to send, and online forms more frustrating. This free image compressor reduces JPG, PNG, and WEBP file size directly in your browser. Your file stays on your device, and the compressed version is created locally for download.
How Image Compression Works
Image compression reduces the amount of data required to store an image. For photographic formats, this usually means choosing a quality level that keeps the image looking good while removing data most people will not notice. For PNG and WEBP, the result depends on the source image, colors, dimensions, and browser support. The target presets give you a practical starting point for common tasks.
The Web preset aims for a small file suitable for pages and thumbnails. The Email preset is less aggressive and useful for attachments. Custom mode lets you set a specific maximum file size in megabytes and adjust initial quality yourself.
How to Compress an Image
- Choose Web, Email, or Custom compression.
- Adjust the quality slider if you want more control.
- Drop a JPG, PNG, or WEBP into the upload area.
- Compare the before and after file sizes, then download the result.
Tips for Better Results
Start with a copy of the original image and compare the compressed file visually before deleting anything. Photos usually compress well. Screenshots with text may need a higher quality setting to avoid fuzzy edges. If the image is still too large after compression, resizing dimensions can help much more than lowering quality. Use the resize image tool when the file is physically larger than the display size you need.
For website images, you can also convert to WEBP after resizing. Smaller dimensions plus a modern format usually produces the best balance between quality and performance.
Frequently Asked Questions
Will compression reduce image quality?
Some compression can change image data, but moderate settings often look very close to the original at normal viewing size.
Why is my PNG not much smaller?
Simple PNG files may already be efficient, while complex screenshots can be difficult to shrink without changing dimensions or format.
Are images uploaded?
No. Compression runs locally in your browser.
What preset should I use for email?
Use the Email preset first. If the attachment is still too large, switch to Custom and set a smaller maximum size.