Free Web Tool
Free Online Image Compressor
Reduce JPG, PNG, and WebP file sizes by up to 90% without losing quality. Fast, private, and completely free — no sign-up required.
Drag & drop your images here
or click to browse — supports JPG, PNG, WebP, AVIF, GIF, BMP (max 50MB each)
Lower = smaller file size. 70–85% is ideal for web.
Leave empty to keep aspect ratio.
300 DPI = print quality. 72 DPI = screen.
Aspect ratio is always preserved.
How to Compress Images Online
Compressing images is one of the fastest ways to speed up your website. Our free online image compressor makes it easy to reduce file sizes without sacrificing visual quality. Here's how it works:
- Step 1: Drag and drop your images into the upload zone, or click to browse your files.
- Step 2: Adjust the compression quality slider. We recommend 70–85% for the best balance of quality and file size.
- Step 3: Choose your output format. WebP and AVIF offer the best compression ratios for modern browsers.
- Step 4: Optionally resize your images using percentage presets, custom pixel dimensions, or exact millimeter/inch dimensions for print.
- Step 5: Click "Compress Images" and download your optimized files instantly.
Why Compress Your Images?
Large image files slow down your website, hurt your SEO rankings, and frustrate visitors. Studies show that 53% of mobile users abandon sites that take longer than 3 seconds to load. Image compression directly impacts your Core Web Vitals, which Google uses to rank pages.
- Faster page loads: Compressed images load quicker, reducing bounce rates and improving user experience.
- Better SEO rankings: Google rewards fast-loading pages with higher search positions.
- Lower bandwidth costs: Smaller files mean less data transfer, saving money on hosting.
- Improved conversion rates: Faster sites convert better — every second of delay costs 7% in conversions.
- Mobile optimization: Compressed images ensure a smooth experience on slow mobile connections.
Supported Image Formats
Our image compressor works with all major image formats used on the web today:
- JPEG (.jpg, .jpeg): The most common format for photographs. Ideal for social media, blogs, and e-commerce.
- PNG (.png): Supports transparency and lossless compression. Best for logos, icons, and graphics.
- WebP (.webp): Google's modern format offering 25–35% better compression than JPEG. Supported by all major browsers.
- AVIF (.avif): Next-generation format with up to 50% better compression than JPEG. The future of web images.
- GIF (.gif): Supports animation and transparency. Can be optimized for faster loading.
- BMP (.bmp): Uncompressed format that benefits enormously from compression.
Advanced Compression Features
Go beyond basic compression with our advanced tools:
- Batch compression: Upload and compress dozens of images at once — no limits on file count.
- Smart format conversion: Convert between formats to find the best balance of quality and size.
- Responsive resizing: Generate multiple sizes for different screen sizes and devices.
- Print-ready resize: Resize to exact millimeter or inch dimensions with custom DPI — perfect for print production.
- Paper size presets: Quick presets for A4, A3, A5, A6, US Letter, and US Legal paper sizes.
- Aspect ratio lock: Images always fit within target dimensions without stretching or distortion.
- Quality preview: See the impact of your compression settings before downloading.
- Privacy-first: All processing happens in your browser. No images are uploaded to any server.
Frequently Asked Questions
How do I compress images without losing quality?
Use our image compressor to reduce file size while maintaining visual quality. Adjust the quality slider to find the perfect balance between size and clarity. We recommend 70–85% quality for web use — the difference is usually imperceptible to the human eye.
What image formats does the compressor support?
Our image compressor supports JPEG, PNG, WebP, AVIF, GIF, and BMP formats. You can also convert between formats during compression. For the best results, we recommend using WebP format which offers superior compression while maintaining excellent visual quality.
Is there a file size limit for image compression?
Each image can be up to 50MB. You can compress multiple images at once in batch mode with no limit on the number of files. All compression happens directly in your browser, so there are no server-side restrictions.
Can I resize images while compressing them?
Yes. You can resize images by percentage, enter custom pixel dimensions, or specify exact millimeter/inch dimensions for print. Preset sizes for A4, A3, A5, US Letter, and more are also available. Our smart resizing always preserves the original aspect ratio — images fit within the target dimensions without stretching or distortion.
How do I prepare images for print?
Switch the resize unit to "Millimeters (mm)", select a paper size preset or enter your custom dimensions, and set DPI to 300 for print quality. The tool will automatically convert millimeters to pixels while preserving aspect ratio. Output dimensions are shown in both pixels and millimeters in the live preview.
Are compressed images saved on your servers?
No. All compression happens directly in your browser. No images are uploaded to or stored on our servers. Your privacy is fully protected — your images never leave your device.
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