Image Compressor
Reduce JPEG, PNG, WebP and AVIF file sizes with adjustable quality, or choose lossless PNG output. Runs in your browser: no upload, no signup.
- Free, no sign-up
- Updated
- Reviewed by Olgun Ozoktas
JPEG (MozJPEG) — best for legacy compatibility.
80%
Smaller fileBetter quality
How to Compress Images Online with Adjustable Quality
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Upload Your Images
Drag and drop your images into the compressor or click to browse files on your device. You can add multiple JPEG, PNG, WebP, or AVIF files at once for batch compression. -
Adjust the Quality Slider
Use the quality slider to set your desired compression level. A setting between 70-85% offers the best balance of file size reduction and visual quality for most use cases. -
Preview the Results
Review the compressed output for each image. The tool displays the original size, compressed size, and percentage saved so you can verify the results before downloading. -
Download Compressed Images
Download individual images or use the Download All button to get every compressed file at once. All processing happens in your browser, so your files are never uploaded to a server.
Common Use Cases
Website and Blog Optimization
Reduce page load times by compressing hero images, thumbnails, and product photos. Smaller images improve Core Web Vitals scores, boost SEO rankings, and lower bounce rates on image-heavy pages.
Email Attachments
Stay under email attachment size limits by compressing photos before sending. Most providers cap attachments at 25 MB, so reducing image sizes lets you share more files in a single message.
Social Media Uploads
Compress images before uploading to Instagram, Facebook, or Twitter to avoid aggressive platform recompression. Pre-optimized images retain more detail and look sharper in feeds.
Storage and Backup Savings
free up disk space on your phone, laptop, or cloud storage by batch compressing old photo libraries. Reduce thousands of images by 50-80% without noticeable quality loss.
Why compress images?
Large images slow down websites and take up storage space. Compressing images reduces file size while maintaining visual quality, improving page load times and saving bandwidth. The quality slider sets the balance between file size and visual quality, and PNG output keeps every pixel.
Image compression reduces file size by removing redundant data from image files. There are two approaches: lossy compression discards some pixel information that the human eye rarely notices, achieving dramatic size reductions of 60-80%. Lossless compression reorganizes data more efficiently without removing any information, typically saving 10-30%. Most web images benefit from lossy compression at quality settings above 75%, where the difference is virtually invisible.
The WebP format has become the gold standard for web images in 2026. Developed by Google, WebP supports both lossy and lossless compression and consistently produces files 25-35% smaller than equivalent JPEG or PNG files. All major browsers now support WebP, making it the recommended format for websites and web applications. If you need to switch formats, use our Image Converter alongside this compressor for the best results.
This image compressor runs entirely in your browser using JavaScript-based encoding. Unlike server-side tools, your photos never leave your device, which makes it ideal for sensitive or private images. For best results, resize your images to the target display dimensions first, then compress. This two-step workflow can reduce file sizes by 90% or more while keeping images crisp and clear on screen.
How it compares
Unlike TinyPNG and Squoosh, this image compressor processes everything locally in your browser. TinyPNG limits users to 500 compressions per month and requires uploading files to their servers. Squoosh is also browser-based but only handles one image at a time. FindUtils Image Compressor has no usage limits, no file upload, no account required, and supports batch compression of multiple images simultaneously. Your files stay private on your device throughout the entire process.
Image Compression Tips
- Set quality between 75-85% for photos. This range typically reduces file size by 60-80% with virtually no visible difference to the human eye.
- Choose WebP format when targeting modern browsers. WebP delivers 25-35% smaller files than JPEG at equivalent visual quality, making it the best format for web performance.
- Use PNG only for graphics with transparency, logos, or screenshots with text. For photographic content, JPEG or WebP always produces smaller files.
- Resize images to their display dimensions before compressing. A 4000x3000 photo displayed at 800x600 wastes bandwidth, so use our Image Resizer first, then compress.
- For lossless output, such as medical imaging or archival work, choose PNG: it is re-encoded with OxiPNG, which shrinks the file without changing any pixel. JPEG, WebP and AVIF are lossy at every quality setting, including 100%.
Frequently Asked Questions
How much can I compress an image?
Compression ratios vary by image type. Photos can typically be reduced by 60-80% with minimal visible quality loss. PNG images with flat colors compress even better.
Will compression affect image quality?
It can. JPEG, WebP and AVIF output is lossy: a lower quality setting gives a smaller file and more visible artifacts, and even 100% re-encodes the image. PNG output is lossless; the slider then sets the compression effort, and the pixels do not change. Compare the result with the original before you download.
What file formats are supported?
Input: JPEG, PNG, WebP and AVIF. Output: JPEG (MozJPEG), WebP, AVIF, or lossless PNG optimized with OxiPNG, so you can change the format while you compress.
Is there a file size limit?
Since all processing happens in your browser, there's no upload limit. However, very large images may take longer to process depending on your device's capabilities.
Is my data secure?
Yes, completely. All image compression happens locally in your browser. Your images are never uploaded to any server, ensuring total privacy.
What is the difference between lossy and lossless compression?
Lossy compression removes some image data to achieve smaller files, typically reducing size by 60-80%. Lossless compression reorganizes data without removing anything, saving 10-30%. For web images, lossy compression at 75-85% quality is usually the best choice.
Should I use WebP instead of JPEG or PNG?
Yes, for web use. WebP produces files 25-35% smaller than JPEG at the same visual quality and supports transparency like PNG. All modern browsers support WebP in 2026. Use our Image Converter to switch formats.
Can I compress multiple images at once?
Yes. Drag and drop as many images as you need into the compressor. All files are processed simultaneously in your browser, and you can download them individually or all at once with the Download All button.
How does this compare to TinyPNG or Squoosh?
TinyPNG limits users to 500 images per month and uploads files to their servers. Squoosh only handles one image at a time. FindUtils compresses unlimited images in batch, entirely in your browser, with no signup or upload required.
What quality setting should I use for website images?
For most website photos, a quality setting of 75-85% provides the best balance. This typically reduces file size by 60-80% with no visible difference on screen. For retina displays, stay at 80% or above to maintain sharpness.