Image Compressor
Shrink JPEG, PNG, WebP and AVIF images without uploading them
- Runs in your browser
- Batch compression
- Target file size
About Image Compressor
Drop in one image or a whole batch, choose a quality or a target file size, and compare the result with the original. You can resize and convert to WebP or AVIF where your browser supports it. Images are processed on your device and aren't uploaded to MemonaIQ.
Choosing a format
- JPEG: photographs where a small amount of quality loss is acceptable
- PNG: screenshots, logos and images that need transparency or sharp edges
- WebP: smaller than JPEG or PNG for most images, and widely supported
- AVIF: often the smallest for photos, but slower to encode and not supported by every browser
Quality or target size
Pick a quality level when you care about how the image looks, or a target size when a form, email or content system has a limit. In target mode the compressor tries several quality levels and keeps the best one under your limit. If even the lowest quality is too large, resize the image as well.
Why nothing is uploaded
Compression runs in your browser using its built-in image encoders. Your images never leave your device, which is useful for personal photos or unreleased designs. The trade-off is that large batches use your device’s memory and processor, so very big jobs may be slower on older phones.
Further reading
Questions people ask
- Will compression reduce image quality?
- Lossy formats trade some detail for size. Use the before-and-after comparison to find the lowest size that still looks right to you.
- Why is my compressed file larger than the original?
- An image that was already heavily compressed, or a PNG converted to a lossless format, can grow. The result shows the size change so you can keep the original instead.
- Is there a file size limit?
- Each image can be up to 50 MB, and a batch can hold up to 50 images and 500 MB in total. Images over 100 megapixels, and animated GIF, WebP or PNG files, are skipped with a message.