Image Compressor

The Image Compressor shrinks photos and graphics entirely inside your browser, so your images never travel to a server while you optimize them. Drop in a PNG, JPG, or WebP, choose an output format, drag the quality slider, and download a re-encoded file seconds later. The interface tracks original and compressed sizes side by side, a savings percentage, and the image dimensions, with a paired preview so you can judge visible quality loss before committing. A quality slider spanning 0.1 to 1.0 (default 0.7) and an output format selector for JPEG and WebP give you fine control over the size-versus-fidelity trade-off. Because re-encoding happens on a canvas with a white fill, JPEG output never picks up an unwanted black background from transparency. This client-side image compression workflow matters most where page speed is a ranking factor: hero images, portfolio shots, and product photos routinely drop by 60 to 90 percent in file size, cutting Core Web Vitals load time and bandwidth costs. For anyone who wants to optimize JPEG and WebP images for faster websites without trusting a third-party upload service, this tool is a safer, faster alternative to server-side compressors.

1. 1

   Click the "Choose image" button or drop a PNG, JPG, or WebP onto the dashed upload area.

2. 2

   Adjust the "Quality" slider — the hint next to the label shows the current value, e.g. 0.70.

3. 3

   Pick JPEG or WebP in the "Output format" dropdown.

4. 4

   Review the Original / Compressed stats and the side-by-side preview to check the trade-off.

5. 5

   Click "Download compressed" to save the file as <name>-compressed.jpg or <name>-compressed.webp.

• Compressing hero images before uploading them to a CMS so pages load faster.
• Shrinking product photos for an e-commerce catalog without losing buyer-appealing detail.
• Converting PNG screenshots to WebP for a documentation site on a tight bandwidth budget.
• Preparing email attachments under strict size limits set by a mail server.
• Reducing portfolio images to meet a static hosting platform's file size caps.
• Flattening transparent PNG logos into JPEG versions for print or legacy viewers.

• Start at the default 0.7 quality and only push lower if the preview shows acceptable loss.
• Prefer WebP output for web use — it usually wins on size at equal quality for photographs.
• Export JPEGs with a white-filled canvas in mind, since transparency is flattened during conversion.
• Compare the Savings stat against the preview rather than chasing the biggest percentage.
• Compress before uploading, not after — originals stay full-quality while the site serves the smaller copy.
• Avoid re-compressing already-optimized JPEGs, which can compound artifacts.

• Drag the quality slider while watching the Compressed stat — savings update live.
• Use WebP when your site already serves WebP variants via a CDN.
• The Dimensions stat confirms nothing was resized during compression.
• Re-pick a file at any time; previous previews are cleaned up automatically.