Compress Image
Reduce image file size while preserving quality.
Reduce image file size while preserving quality.
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Tool guide
Free Online Image Compressor
Compress one image or a batch of up to 500 browser-decodable images. Adjust JPG quality, compare the original and compressed preview, process files sequentially, and download successful results individually or in smaller ZIP archives when supported.
Steps
How it works
- Choose one or more supported images, or drop a folder into the upload area.
- Adjust the quality slider and compare the selected image before processing.
- Compress the image or batch in your browser.
- Download the JPG results individually or use the available ZIP options.
Highlights
Key features
- Single-image and batch compression for up to 500 files.
- Side-by-side original and compressed preview.
- Sequential batch processing to limit browser memory pressure.
- Individual downloads plus ZIP and smaller-ZIP options where available.
Use cases
Common uses
- Reduce photo sizes before uploading them to a website.
- Prepare batches of images for email or cloud storage.
- Compare quality settings before compressing a collection.
- Convert browser-supported image inputs into smaller JPG copies.
Notes
Limitations to know
- Outputs are JPG files, so transparent areas are placed on a white background.
- Lower quality settings can introduce visible compression artifacts.
- Large batches may take longer and can exceed browser memory limits.
- ZIP availability depends on the completed output size and the browser or device.
FAQ
Frequently asked questions
Can I compress multiple images at once?
Yes. You can process up to 500 supported images sequentially in one batch.
What format does the compressor create?
The tool creates JPG output files, including when the source uses another browser-supported image format.
Can I preview compression quality first?
Yes. The comparison area shows the selected original and a compressed preview as you adjust quality.
Why might Download All as ZIP be unavailable?
A completed batch can be too large for reliable single-ZIP creation in the current browser. Individual and smaller grouped ZIP downloads remain available where possible.