SmartConvert

New: AVIF Converter is live — convert AVIF to JPG, PNG or WebP in bulk, right in your browser. Try it now

Image Compressor

Compress PNG, JPG and WebP images to smaller sizes without uploading.

Runs locally in your browser — no upload.

Free Online Image Compressor — Shrink PNG, JPG & WebP

Large images are the number one reason websites feel slow. Every uncompressed screenshot, camera photo or exported design adds megabytes of weight that visitors have to download before they see your page. This image compressor fixes that in seconds: drop in a PNG, JPG or WebP file, choose a quality level, and download a dramatically smaller version — without uploading a single byte to any server.

The compressor re-encodes your image right inside the browser using the canvas engine, so processing is instant and completely private. A live size estimate shows exactly how much space you are saving while you drag the quality slider, taking the guesswork out of finding the balance between visual fidelity and file size. Dimensions are never touched: your image keeps its exact pixel size and aspect ratio.

Need even smaller files? Switch the output format to WebP — Google's modern format routinely produces files 20–40% smaller than JPG at the same visual quality, which is why it has become the default choice for fast-loading websites. You can also keep the original format when compatibility with older software matters most.

How to Use This Tool

  1. Add an image — drag a PNG, JPG or WebP file into the upload area, click to browse, or paste from your clipboard.
  2. Choose the output format — keep the original format, or switch to JPG or WebP for extra savings.
  3. Adjust quality — move the slider and watch the estimated compressed size update live.
  4. Download — save the optimized image, ready for your website, email or chat app.

Need different dimensions or a tighter framing instead of just a smaller file? Crop and resize the image — it can also convert between JPG, PNG and WebP on export.

Benefits

  • Real savings, visible instantly — live before/after sizes with a savings percentage.
  • WebP conversion built in — unlock the smallest practical image files on the web.
  • Dimensions preserved — no cropping, resizing or distortion, ever.
  • Completely private — compression runs locally; images never leave your device.
  • Free forever — no signup, no limits, no watermarks.

Frequently Asked Questions

The tool re-encodes your image with a quality level you control. Higher quality keeps more detail but produces a larger file; lower quality discards subtle detail the eye barely notices, shrinking the file dramatically. You see the estimated output size live before downloading, so you can find the sweet spot for each image.

WebP almost always produces the smallest files at comparable quality — typically 20–40% smaller than JPG. If you keep the original format, JPG and WebP sources compress well via the quality slider. PNG is lossless, so compressing it to PNG barely changes the size; converting it to WebP or JPG is what saves space.

JPG and WebP compression is 'lossy' — at high quality settings (80%+) the difference is virtually invisible, while file size drops significantly. Dimensions are never changed: your image stays exactly the same pixel size. PNG output remains lossless with zero quality loss.

No. Compression happens entirely inside your browser using the HTML canvas. Your images never leave your device — nothing is uploaded, stored or logged anywhere.

Yes — free, unlimited, no signup and no watermarks. Compress as many photos, screenshots and graphics as you like, all processed locally on your own device.

Related Tools