01
Open one still image
Add a PNG, JPG, or WebP. The tool keeps its pixel dimensions, so use the resizer first if you also need a smaller image width or height.
Compress images online with JPEG, WebP, AVIF, and lossless PNG
Compress a single image locally, compare original and output sizes, and preview the result. Choose lossy JPEG, WebP, or AVIF, or optimize PNG without changing decoded pixels.
Free to useNo watermarkFiles stay private
A smaller file, with the detail you need
Make room for a lighter image.
Drop a PNG, JPG, or WebP here. Up to 20 MB and 16 megapixels. Choose an output format and compare the actual file size.
Local WASM encoding · No uploads · No watermark
FROM SOURCE TO FINISHED FILE
How to use the Image compressor online
02
Choose compression and check the preview
Select JPEG, WebP, or AVIF and adjust quality, or use lossless PNG optimization. Choose an opaque matte for JPEG when the source includes transparency.
03
Compare real sizes and download
Inspect the original and result, then compare actual bytes and the size change. A recompressed file may be larger; download only when the result suits your use.
Balance image quality and file size
Lossy encoding changes pixels to save space. Photographs often tolerate it better than screenshots, small text, or sharp logos. Review edges and detailed areas in the result instead of relying on the quality number alone.
JPEG cannot store alpha. WebP and AVIF can preserve transparency in this workflow; PNG optimization preserves the decoded pixel data. Format compatibility at the receiving app still matters.
Optimize a PNG without promising a smaller result
Lossless PNG optimization searches for a more efficient representation of the decoded image. It does not reduce the image dimensions or intentionally discard visible pixel detail. Original metadata and animation are not carried into the new still-image file.
Already optimized sources and detailed photographs can produce little saving or a larger output. The before-and-after byte count reports the actual result; the tool does not promise a fixed percentage or a particular size in KB.
What to know before using this Image compressor
- Savings depend on source content and settings; some results are larger than the original.
- This workflow handles still pixels and does not preserve animation, editable layers, EXIF, or other original metadata.
- AVIF encoding can take longer, especially on mobile devices. The destination application must support the chosen format.
PRACTICAL ANSWERS
Image compressor questions and answers
Formats, useful settings, and the details that affect your result.
Can I compress an image without uploading it?+
Yes. Your image is decoded and encoded in your browser. Codec files may download when needed, but the selected image is not sent to a processing server.
Is PNG compression lossless?+
The PNG option optimizes the decoded pixel data without intentional pixel changes. It creates a new still-image file and does not retain the original metadata or animation.
Why did the compressed file get larger?+
The source may already use efficient compression, or a different format may be less suitable for its content. Compare the actual byte counts and keep the original when it is preferable.
Does a lower quality setting guarantee a target size?+
No. Quality influences lossy encoding, but output size also depends on dimensions and content. This tool reports the encoded result rather than guaranteeing a target number of KB.
How can I compress several images at once?+
Use the batch image converter to apply one format and quality setting to up to 20 local images, review each result, and download the completed files as a ZIP.