What this tool does
Compresses JPG, PNG, and WEBP images by reducing encoding quality. Savings and visible changes depend on image content and settings.
Image tool
Image Compressor
Reduce image file size with quality and dimension controls. Compare the result with your original before choosing which file to keep.
Complete guide
How to use Image Compressor
Image tools guide for image compressor users.
Choose an image and try the balanced quality preset first. Compare both the byte size and the preview, then reduce quality or dimensions if necessary.
A 2000 x 1000 photo resized to 1000 x 500 contains one quarter as many pixels, but its encoded file size is not guaranteed to fall by the same proportion.
Lossy compression changes pixels. Fine text, gradients and sharp edges may show artifacts even at high quality. PNG is useful for exact graphics and transparency; WebP often works well for website photographs. Never discard the original until you have inspected the download.
Compression is limited by the browser's encoders and device memory. Large images can take longer or fail on low-memory devices. See WebP encoding principles for the format tradeoffs.
Try AVIF or WebP and inspect the comparison slider at synchronized zoom. Target-size compression may reduce quality and dimensions; it reports failure if the target cannot be reached within its limits. Lossless WebP cannot be combined with target-size or resizing requests.
Continue with the responsive image generator to download multiple widths and a srcset snippet, or compare two images.
How to use it
Upload an image. Set the quality slider (80 is a good starting point for photos). Download the compressed file.
Format notes
JPG and WEBP: quality slider directly controls compression. PNG: browser Canvas encoding does not use the quality slider. Change dimensions or choose JPG/WebP to reduce size further.
Quick checklist
- For photos: try quality 75-85, then inspect the preview for visible changes.
- For PNG: compression is lossless - no quality is lost regardless of the slider.
- Batch compress by uploading multiple files at once.
- Check the before/after file size display - stop if the saving is small.
Answers
Image Compressor FAQs
Will the compressed image look different?
It may. Lossy encoding changes pixels and can produce visible artifacts, especially around text and sharp edges. Compare the preview and keep the original.
Is there a file size limit?
Browser memory and decoding limits vary by device. Very large images may be slow or fail; resize them or process fewer images at once.
Which format gives the smallest file?
There is no universal winner. WebP often works well for photos, while PNG may suit simple graphics. Compare actual output sizes at acceptable quality.