Image Compressor
Free online image compressor. Pick a quality level and output format (JPEG or WebP) to reduce image file size instantly — no uploads, everything runs in your browser.
This image compressor reduces the file size of your photos by re-encoding them at a quality level you control. Choose JPEG for photographs or WebP for even smaller files, drag the quality slider, and instantly see how much you've saved compared with the original. Everything happens locally in your browser — your images are never uploaded to any server, so the process is completely private and works offline once the page loads.
Smaller images mean faster-loading pages, lower bandwidth, and quicker uploads to social media or email. Because the tool uses your browser's built-in Canvas encoder, there are no external libraries and nothing leaves your device.
Frequently asked questions
Are my images uploaded anywhere?
No. All compression happens entirely in your browser using the Canvas API. Your images never leave your device.
Should I pick JPEG or WebP?
JPEG is the most widely supported format for photos. WebP usually produces smaller files at the same quality but is slightly less universal. Both are great for the web.
What does the quality slider do?
It controls how much detail is kept when re-encoding. Lower values produce smaller files with more compression artifacts; higher values keep more detail but save less space.
Why is my compressed file sometimes larger?
If the original was already heavily compressed, re-encoding at a high quality can add bytes. Lower the quality or switch to WebP to get a smaller result.
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