Compress Image Online

Reduce image file size by up to 90% with adjustable quality. Convert to JPG, WebP, or PNG.

Runs in your browser — images never leave your device
Drop your image here or click to upload
JPG, PNG, WebP, GIF, BMP · No size limit
80
Original: -- Compressed: -- --
Dimensions: --
Format: --

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How It Works

1

Upload Your Image

Drop any image — JPG, PNG, WebP, GIF, or BMP. No size limit.

2

Adjust Quality

Use the quality slider to find the perfect balance between file size and image quality. Choose JPG, WebP, or PNG output.

3

Download

Download your compressed image instantly. See exactly how much smaller the file is before you save.

How to Compress an Image

Image compression reduces file size by removing redundant data while preserving visual quality, making images load faster and use less storage.

Image compression is essential for anyone working with digital images. Large image files slow down websites, clog email inboxes, eat up storage space, and create friction in workflows. A single uncompressed photo from a modern smartphone can be 5-15 MB — far too large for most web and email use cases. Compression reduces these files to a fraction of their original size, often with no visible quality loss.

There are two fundamental types of image compression: lossy and lossless. Lossy compression (JPG, WebP) discards some image data to achieve dramatically smaller file sizes. At quality levels of 70-85%, the discarded data is typically imperceptible to the human eye, yet file sizes can be reduced by 80-95%. Lossless compression (PNG) reduces file size without discarding any data — every pixel is preserved exactly — but achieves more modest size reductions.

JPG Compression

JPG (JPEG) is the most widely used image format on the web. It uses lossy compression based on discrete cosine transform (DCT), which takes advantage of the human eye's reduced sensitivity to fine color details. JPG excels at compressing photographs and images with smooth gradients. At quality 80, most photos look identical to the original while being 5-10x smaller. JPG does not support transparency.

WebP Compression

WebP is a modern image format developed by Google that provides superior compression to both JPG and PNG. WebP typically produces files 25-35% smaller than JPG at equivalent visual quality. It supports both lossy and lossless compression, as well as transparency. WebP is now supported by all major browsers and is the recommended format for web optimization.

PNG Compression

PNG uses lossless compression, preserving every pixel exactly as the original. This makes PNG ideal for graphics, logos, screenshots, and images with text — anywhere precise pixel accuracy matters. PNG supports full transparency (alpha channel). While PNG files are larger than JPG or WebP for photographs, they are often smaller for graphics with large areas of solid color.

Image Compression Use Cases

Website Speed Optimization

Images are the largest contributor to page weight on most websites. Compressing images can reduce page load time by 50-80%, directly improving user experience, bounce rates, and Google Core Web Vitals scores. Faster pages rank higher in search results and convert more visitors into customers.

Email Attachments

Most email providers limit attachment sizes to 10-25 MB. Compressing photos before attaching them lets you send more images per email and ensures delivery. Compressed images also download faster for recipients, especially on mobile connections where bandwidth is limited.

E-commerce Product Images

Online stores often have hundreds or thousands of product images. Compressing these images reduces hosting costs, speeds up category and product pages, and improves the mobile shopping experience. WebP at quality 80 is ideal for product photos — visually identical to the original at a fraction of the file size.

Social Media Posts

Social platforms compress uploaded images automatically, often aggressively. Pre-compressing your images with careful quality settings gives you more control over the final result. Upload already-optimized images at the platform's recommended dimensions to avoid double compression artifacts.

Cloud Storage & Backup

Compressing your photo library before backing up to cloud storage can reduce storage usage by 60-80%, saving significant costs on services like Google Drive, Dropbox, or iCloud. A 50 GB photo collection can often be compressed to under 15 GB with no visible quality loss.

Mobile App Performance

Mobile apps that load images over cellular networks benefit enormously from compressed assets. Smaller images mean faster load times, less data usage for users on limited plans, and smoother scrolling. Compressed images also reduce the app's memory footprint, preventing crashes on lower-end devices.

Image Compressor Features

Adjustable Quality

Fine-tune compression from 1-100 with a real-time slider. See the size change instantly.

Multiple Formats

Output as JPG, WebP, or PNG. Convert between formats for optimal compression.

Real-Time Preview

See compressed file size update live as you adjust the quality slider. No waiting.

Size Comparison

Clear before/after file size display with percentage savings shown prominently.

100% Private

Everything runs in your browser. Images never leave your device or touch a server.

Unlimited & Free

No limits, no sign-up, no watermarks. Compress as many images as you need.

Frequently Asked Questions

Is my image uploaded to a server?
No. All compression happens in your browser using the HTML5 Canvas API. Your image never leaves your device — completely private and secure. No server processing, no data collection.
What quality setting should I use?
For most uses, quality 75-85 provides the best balance between file size and visual quality. At quality 80, most photos are visually indistinguishable from the original while being 5-10x smaller. For web images, 70-80 is ideal. For print or archival, use 90-95 or choose PNG for lossless compression.
Which format should I choose — JPG, WebP, or PNG?
For photographs: WebP produces the smallest files at equivalent quality. JPG is the most universally compatible. For graphics, logos, or images with text: PNG preserves exact pixel quality with no compression artifacts. For web optimization: WebP first, JPG as fallback. For images with transparency: WebP or PNG (JPG does not support transparency).
Will compressing reduce image quality?
With JPG and WebP (lossy formats), yes — but at quality 70-85, the quality loss is typically invisible to the human eye. The slider lets you find the exact threshold where you get maximum compression with no visible difference. PNG compression is always lossless — zero quality loss regardless of settings.
How much smaller will my image be?
It depends on the image content, original format, and quality setting. Photographs typically compress very well: JPG at quality 80 is usually 70-90% smaller than the uncompressed original. WebP achieves even better compression, often 25-35% smaller than JPG at the same visual quality. Graphics and screenshots compress less dramatically.
Can I compress PNG images without losing quality?
Yes. Select PNG as the output format and the compression is completely lossless — every pixel is preserved exactly. However, lossless PNG compression achieves more modest file size reductions compared to lossy JPG or WebP. For maximum compression, convert to WebP or JPG.
Does compression change image dimensions?
No. Compression only affects file size, not image dimensions. The width and height in pixels remain exactly the same. If you need to resize your image to smaller dimensions (which also reduces file size), use a dedicated resize tool.
Is WebP supported by all browsers?
Yes, as of 2023 WebP is supported by all major browsers including Chrome, Firefox, Safari, Edge, and Opera. Safari added WebP support in version 14 (2020). For legacy browser support, JPG remains the safest choice.
Can I compress multiple images at once?
This tool processes one image at a time with full control over quality settings. For batch compression needs, PixelPanda's dashboard offers bulk processing tools. Each image you compress here can be downloaded immediately before loading the next.
What happens to image metadata (EXIF data)?
When you compress an image through the Canvas API, EXIF metadata (camera settings, GPS location, date taken) is stripped from the output. This is actually a privacy benefit — location data and camera information are removed. If you need to preserve metadata, use a dedicated metadata-aware tool.
Is there a file size limit?
No enforced limit. The tool handles any image size your browser can process. Very large images (50+ megapixels) may take a moment to render. Modern browsers can typically handle images up to 100 megapixels.
Does it work on mobile?
Yes, fully responsive. Works on iPhone, Android, iPad, and any device with a modern browser. Compress photos directly from your phone's camera roll before sharing.
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