Image Compressor

Reduce image file size with adjustable quality — fast, private, and right in your browser.

upload_file

Drag & Drop your image here or click to upload

Supports JPEG, PNG, WebP, BMP, and GIF formats

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About Image Compressor

Image Compressor is a free online tool that reduces the file size of your images without significantly affecting visual quality. Whether you need to optimize images for web performance, email attachments, or storage constraints, this tool provides precise control over compression quality from 1% to 100%.

All compression happens entirely in your browser using the HTML5 Canvas API — your images are never uploaded to any server. Upload your photo, adjust the quality slider, select your preferred output format (JPEG, PNG, or WebP), and instantly see the before-and-after file size comparison before downloading.

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How to Use

01

Upload Image

Drag and drop your image into the upload area, or click to browse and select a file from your device.

02

Adjust Quality

Use the quality slider to set your desired compression level. Lower values mean smaller files but reduced quality.

03

Compress & Download

Click "Compress" to process the image, review the size savings, then download the optimized result.

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Frequently Asked Questions

What is Image Compressor? expand_more
Image Compressor is a free online tool that reduces image file sizes by adjusting compression quality. It supports JPEG, PNG, and WebP output formats, and shows you exactly how much space you save with a before-and-after comparison.
Is my image uploaded to a server? expand_more
No. All image compression happens entirely in your browser using client-side JavaScript and the Canvas API. Your images never leave your device, ensuring complete privacy and security.
How does the quality slider work? expand_more
The quality slider controls the compression ratio from 1% (maximum compression, lowest quality) to 100% (minimum compression, highest quality). For JPEG and WebP formats, lower quality values produce significantly smaller files. PNG is lossless so the quality slider does not apply.
What is the best quality setting? expand_more
For most use cases, 70-85% quality provides an excellent balance between file size and visual quality. For web images, 60-75% is often sufficient. For print or high-quality needs, use 90-100%.