Image Compressor

How to compress images

1. Drop your JPG, PNG or WebP images on the drop zone, or click it to choose them. You can add many files at once.
2. Move the Quality slider. 70–80 % is a good balance for photos; lower values give smaller files with more visible artifacts.
3. Pick an Output format: Same as original, JPG or WebP. Converting PNG photos to JPG or WebP usually saves the most.
4. Optionally, enter a Maximum width or height (px, optional). Larger images are scaled down so their longest side fits, which shrinks the file much further.
5. Click Compress images. Each row shows a preview, the size before → after and the percentage saved, with its own Download button. The status line gives the total for the whole batch, and Download all saves every file.

If you are not happy with the result, change the settings and click Compress images again: the originals are still in the list.

How image compression works

JPG and WebP are lossy formats. The encoder splits the picture into small blocks and keeps less detail where the eye is least likely to notice it, such as fine texture and subtle color variations. The quality setting controls how much is thrown away. Between 100 % and about 80 % the file typically shrinks by half or more with almost no visible difference; below 60 % you start to see blocky areas, halos around edges and banding in skies.

PNG is lossless: every pixel is kept exactly, so the quality slider has no effect on a PNG saved as PNG. Re-saving a PNG in the browser rarely makes it smaller, and this tool keeps the original when that happens. To really reduce a PNG, either choose JPG or WebP (fine for photos and screenshots without transparency needs), or set a maximum width or height.

WebP generally produces files 25–35 % smaller than JPG at the same visual quality and supports transparency, and every current browser can display it. JPG remains the safest choice for email attachments and older software.

Tips for the smallest files

• Resize first. A 12-megapixel phone photo is 4000 pixels wide, far more than a web page or an email needs. A maximum side of 1600–2000 pixels often divides the file size by five.
• Use WebP for the web, JPG for compatibility.
• Don’t compress the same JPG repeatedly. Each lossy save loses a bit more detail; start from the best original you have.
• Transparent PNGs converted to JPG get a white background, since JPG has no transparency. Choose WebP to keep it.

Privacy and metadata

Your files never leave your device: the compression runs in your browser, with no upload and no server. Compressed images are re-encoded from the pixels, so EXIF metadata such as the camera model, the date and the GPS position is removed. The only exception is when the tool keeps an original that was already smaller: that file is returned unchanged, metadata included.