Image Compressor
What is Image Compressor
Image Compressor is a free browser-based tool that reduces image file sizes by re-encoding them at a lower quality level. Upload a JPEG, PNG, or WebP image, choose your output format (JPEG or WebP) and drag the quality slider until you strike the right balance between file size and visual quality. All processing happens locally in your browser, so your images never leave your device.
How to use
- Upload an image by clicking the drop zone or dragging a file onto it.
- Choose the output format — JPEG for universal compatibility or WebP for smaller files.
- Drag the quality slider to set the compression level (80 is a great starting point).
- Compare the original and compressed previews side by side.
- Click Download to save the compressed image to your device.
When to use it
Got screenshots weighing your page down? Drop in your 2–4 MB PNGs, convert them to WebP at 80% quality, and watch each one shrink to under 200 KB. Your page loads over 80% faster, with no quality loss you can actually see.
Frequently asked questions
Which image formats can I compress?
You can upload JPEG, PNG, and WebP images. The output can be JPEG or WebP — both support quality-based compression via the browser's Canvas API.
Why might a PNG file end up larger after compression?
PNG uses lossless compression, so the quality slider does not reduce PNG output size. Choose JPEG or WebP as the output format instead — that will dramatically reduce file size even for PNG source images.
Does my image get uploaded to a server?
No. All compression happens locally in your browser using the Canvas API. Your images never leave your device.
What quality setting should I use?
80 is a widely recommended starting point — it cuts file size by 60–70% with barely any visible quality loss. For photos, 70–85 is ideal. Drop to 60 for maximum size reduction when top quality is less critical.
What is the difference between JPEG and WebP output?
WebP produces smaller files at the same visual quality compared to JPEG and also supports transparency. JPEG has broader compatibility with older software and email clients.
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