Free · No signup · Private
Compress Images Online
Reduce image file sizes by up to 80% without losing quality. Supports JPEG, PNG, and WebP. 100% free, no signup, and your files never leave your browser.
Drop images here or click to browse
Supports JPEG, PNG, and WebP
How to Use
1
Drop your images onto the upload area or click to select files from your device.
2
Adjust the quality slider to control the compression level — lower values mean smaller files.
3
Click 'Compress All' and download your optimized images individually or as a batch.
Frequently Asked Questions
Is this image compressor really free?
Yes, completely free with no limits on the number of images you can compress. No signup, no watermarks, no hidden fees.
Are my images uploaded to a server?
No. All compression happens directly in your browser. Your images never leave your device, making this the most private way to compress images online.
What image formats are supported?
We support JPEG, PNG, and WebP formats. The compressed output will be in the same format as your original image.
How much can I reduce my image file size?
Typically you can reduce file sizes by 40-80% depending on the image content and quality setting. Photos with lots of detail compress well at 60-70% quality with minimal visible difference.
Will compressing reduce image quality?
The quality slider lets you control the balance between file size and visual quality. At 70% quality, most images look virtually identical to the original while being significantly smaller.
Is there a file size limit?
Since everything runs in your browser, the limit depends on your device's available memory. Most devices can handle images up to 50MB without issues.
Can I compress multiple images at once?
Yes! You can drag and drop multiple images or select multiple files at once. All images will be compressed in sequence with your chosen quality settings.
How do I compress images without losing quality?
Use a higher quality setting (80-90%) for near-lossless compression. PNG images use lossless compression by default. For photos, JPEG at 75-85% quality produces files that are visually indistinguishable from the original while being much smaller.
Which image format is best for websites?
WebP offers the best balance of quality and file size for web use — typically 25-35% smaller than JPEG at the same quality. JPEG is ideal for photographs, while PNG is best for images with text, logos, or transparency. Use WebP when browser support isn't a concern.
How do I reduce image size for email attachments?
Most email providers limit attachments to 25MB. Set the quality slider to 60-70% for photos — this typically reduces a 5MB image to under 1MB while keeping it sharp enough for viewing on screen. For multiple images, compress each one individually before attaching.
What's the difference between lossy and lossless compression?
Lossy compression (JPEG, WebP) permanently removes some image data to achieve smaller files — great for photos where minor quality loss is invisible. Lossless compression (PNG) reduces file size without removing any data, preserving every pixel perfectly. Choose lossy for photos and lossless for graphics, screenshots, or images with text.
How do I compress images for social media?
Social media platforms re-compress uploads, so start with a well-optimized image. For Instagram, Facebook, and Twitter, compress to JPEG at 70-80% quality and resize to the platform's recommended dimensions (e.g., 1080x1080 for Instagram posts). This gives platforms a clean source to work with.
Can I compress images on my phone?
Yes! This tool works on any device with a modern browser, including iPhones and Android phones. Simply open the site in your mobile browser, tap to select photos from your camera roll, adjust the quality slider, and download the compressed files — no app installation needed.