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MyImageToolbox

Compress Image

Client-side

Reduce the file size of JPG, PNG and WebP images with adjustable quality, in your browser.

Runs 100% in your browser · If you allow preferences, this browser saves the output format, quality and maximum size — never your images

Drag and drop your images here

or

JPG, PNG, WebP, GIF, BMP, AVIF, HEIC · up to 50 MB per file

Your images are processed in your browser and are not uploaded. You can also paste an image with Ctrl+V.

75% is a good balance for photos. WebP is usually 25–35% lighter than JPG at the same quality; PNG keeps every pixel but compresses little.

What does Compress Image do?

Compress Image makes photos and graphics lighter so they load faster on websites, fit e-mail and form upload limits and take less space on your phone or in the cloud. Drop one picture or a whole folder: every image is re-encoded at the quality you choose and, if you want, scaled down to a sensible maximum size. A typical 5 MB phone photo becomes 300–800 KB with no visible difference on screen.

How it works

Your browser decodes each image and encodes it again with its built-in JPG, WebP or AVIF encoder. The quality slider controls how much detail the encoder may discard: around 75% is the sweet spot for photos, 85–90% for images with fine text, and 50–60% when size matters more than perfection. Reducing the maximum size has an even bigger effect, because a 4000-pixel photo shown on a 1280-pixel screen carries millions of pixels nobody sees.

Choose WebP for the web: it is supported by every modern browser and is usually 25–35% smaller than JPG at the same visual quality, and it keeps transparency. AVIF is even smaller but not every browser can create it. Keeping the original format is best when the file must stay a JPG, for example for older software. PNG is lossless, so re-saving a PNG rarely makes it smaller; convert it to WebP instead. If a result would not be lighter than the original, the tool keeps your original file and tells you.

Private by design

Everything happens on your device. Your photos are never uploaded, which also makes the tool fast: there is no waiting for files to travel to a server and back. Results for several images are offered individually or together in one ZIP.

How to compress images

  1. Drop your images onto the drop zone, click Choose images or paste a screenshot with Ctrl+V.
  2. Pick the output format, the quality and, optionally, a maximum size for the longest side.
  3. Click Compress images and compare the new size of each file with the original.
  4. Download each image or all of them as a ZIP.

Frequently asked questions

Will my photo lose quality?

JPG, WebP and AVIF are lossy formats, so some detail is always removed, but at 70–80% the difference is very hard to see. Keep your original if you might need to print it large later.

Is the EXIF information kept?

No. Re-encoding drops camera details and GPS location, which is good for privacy. Use Remove EXIF Data if you want to clean a photo without re-compressing it.

What are the limits?

Up to 50 MB and 50 megapixels per image. Large batches use more memory, so phones may be slower than computers.