Website photo
Input: A large JPEG product photo
Result: A lower-quality JPEG at the same pixel dimensions, with its new file size shown before download.
Image Compressor
Reduce image file size locally with a clear JPEG quality control.
Compress browser-readable images into adjustable-quality JPEG files locally in your browser, compare original and output sizes, preview the result, and download the compressed file.
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About this tool
What is Image Compressor?
Compress browser-readable images into adjustable-quality JPEG files locally in your browser, compare original and output sizes, preview the result, and download the compressed file.
Motion showcase
See Image Compressor in action
A short visual walkthrough generated from this tool's current workflow.
What you can do
- Load JPEG, PNG, WebP, and other image formats the browser can decode
- Choose JPEG quality from 10% to 95%
- Preview the original and compressed image side by side
- Compare original and compressed file sizes before downloading
- Download the result as a JPEG without sending the image through the compressor logic to a server
How to use Image Compressor
- 1Choose an image from your device.
- 2Set the JPEG quality. Start around 75–85% for a practical balance between file size and visible detail.
- 3Run the compressor and compare the original and compressed previews.
- 4Check the output file size and inspect text, edges, gradients, and fine details.
- 5Download the JPEG when the visual quality and file size fit your use case.
Examples
PNG screenshot
Input: A PNG screenshot without required transparency
Result: A JPEG preview that can be smaller, depending on image content and the selected quality.
Tool facts
- Processing
- Image decoding, canvas drawing, and JPEG encoding run in the browser.
- Output format
- JPEG
- Dimensions
- The output keeps the source pixel dimensions.
- Quality range
- 10% to 95% JPEG quality.
- Account required
- No account is required to compress or download an image.
Limitations
- The output is JPEG, so PNG transparency is not preserved.
- JPEG is lossy; lower quality settings can introduce visible artifacts around text, edges, and gradients.
- A JPEG can occasionally be larger than the source when the source is already highly optimized or uses a more suitable format.
- The tool does not resize dimensions, convert to AVIF/WebP output, or perform perceptual multi-format optimization.
Privacy and data handling
The compressor reads the selected file with browser APIs and performs its image processing with an in-browser canvas. The compressor code does not upload the selected image to an image-processing endpoint. As with any website, unrelated page requests such as analytics or static assets may still occur.
FAQ
Image Compressor FAQs
?Why does the compressed result download as JPG?
This tool exports JPEG at the selected quality. It does not preserve the original file format or transparent PNG alpha channel.
?How do I balance file size and visible detail?
Keep the required dimensions, try a moderate quality value, and inspect edges and text in the preview. Compare the downloaded file size with the original.