Compress Image

Reduce file size while maintaining visual quality. Perfect for web optimization.

Drop your image here 🍡

PNG, JPG, WebP, BMP — any size, mochi handles it all

Files never leave your device
100% Private No Signup No Watermarks
Mode
Quality80%
Format
Max Width
Est. Size—
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If over-compression made your image soft, use the Photo Editor to restore clarity, or Convert to a different format.

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How to Compress Images Online

Compress images online to reduce file size without visible quality loss. imagemochi's free image compressor uses smart quality adjustment to find the optimal balance between size and clarity. Perfect for speeding up your website, meeting email attachment limits, or preparing images for social media platforms with upload size restrictions. Target a specific file size like under 100KB, 200KB, or 1MB. All compression happens in your browser — your photos stay private.

1
Upload
Drop your image or click to browse
2
Compress
Adjust quality or set a target file size
3
Download
Save your optimized image

Frequently Asked Questions

How much can I compress an image?
Typical savings range from 50-80% for JPEG and WebP at quality 80%, which is nearly invisible to the human eye. PNG compression is lossless so savings are smaller, typically 10-30%. WebP consistently delivers the best compression ratios. For maximum reduction, resize to your target dimensions first, then compress — this combined approach can reduce files by over 90%.
Does compression reduce image quality?
At quality settings of 80% and above, compression artifacts are virtually invisible in normal viewing conditions. Between 60-80%, slight softness may appear in gradient areas. Below 60%, block artifacts and color banding become noticeable. The real-time preview helps you find the sweet spot between file size and visual quality before downloading.
What format gives the smallest file size?
WebP produces the smallest files at equivalent visual quality — typically 25-35% smaller than JPEG and dramatically smaller than PNG. JPEG is the second most efficient for photographs. PNG is largest but lossless, making it better for graphics with sharp edges and text. Use the Format dropdown to compare sizes with the same quality setting.
What does the Max Width option do?
The Max Width field lets you simultaneously downscale and compress in one step. If your image is wider than the specified pixel value, it will be proportionally resized before compression. This is extremely useful for web optimization — you can take a 4000px camera photo and output a compressed 1200px version in a single operation.
Can I compress multiple images at once?
Yes, batch compression is fully supported. Set your quality, format, and optional max width, then upload multiple files. All images are compressed with identical settings, making it ideal for optimizing an entire website image folder, email attachments, or photo gallery for consistent file sizes and loading performance.

Related preset categories

Curated multi-step recipes that build on this tool — drop an image, get the right output for the destination platform without configuring the steps yourself.

Compression & utilityPre-built compression presets at 100 KB, 1 MB, 5 MB, and other common upload-form caps. Marketplace listingsCompress product photos to fit marketplace per-image upload caps without losing the dimensions the platform's image search ranks against. Social mediaCompress before posting to slow connections, mobile data, or platforms with strict per-attachment caps.

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