Compress Images Online
Reduce file sizes by up to 90% with adjustable quality or an exact target size. Fast, free and 100% private — your images never leave your browser.
Drop images here or browse files
Supports single or batch upload · Paste with Ctrl+V
100% private. Your images are processed locally in your browser and never uploaded to any server.
Step by step
How to Compress an Image Online
Three steps and your image is ready. No account, no software, no waiting.
Upload your images
Drag and drop JPG, PNG or WebP files into the upload area, or click Choose Images to browse. You can add multiple files at once.
Choose compression settings
Pick a quality level with the slider, or switch to Target File Size mode and enter an exact KB or MB target. Optionally select an output format and resize dimensions.
Compress and download
Click Compress Image (or Compress All Images for multiple files). Use the before/after slider to compare results, then download each file individually or all at once as a ZIP.
Benefits
Why Compress Images?
Smaller images benefit websites, apps, emails and storage — without visible quality loss at the right settings.
Faster page loads
Smaller images reduce page weight and improve load times, directly boosting Core Web Vitals and search rankings.
Save storage space
Compressed images take up less disk space, reducing cloud storage costs and making it easier to manage large photo libraries.
Reduce bandwidth costs
Serving compressed images reduces data transfer, which is especially important for high-traffic websites and mobile users on limited data plans.
Easy sharing
Smaller files attach faster to emails, upload quicker to social media, and are easier to share over messaging apps with file size limits.
100% private
Unlike server-based tools, this compressor processes images locally in your browser. No data is uploaded, stored or shared.
Instant results
Browser-based compression starts immediately without waiting for an upload. Large batches process in seconds without leaving the page.
Understanding compression
Image Quality vs File Size
Every lossy format (JPG, WebP) encodes an image by discarding data that the human eye is less likely to notice — high-frequency detail, subtle colour transitions, and background noise. The quality setting controls how aggressively this happens.
At 80–90 % quality most photos look identical to the original while the file is 40–70 % smaller. Dropping below 60 % produces a visible difference and is best used only when file size is the overriding priority, for example thumbnail grids or email previews.
PNG uses lossless compression and cannot be shrunk by quality alone. To reduce a PNG meaningfully, export it as WebP (supports transparency) or JPG (smaller for photos).
Virtually identical to original. Best for print, archiving and editing.
Excellent visual quality with 40–60 % smaller files. Ideal for web images.
Visible compression artifacts on close inspection. Suitable for thumbnails.
Significant quality loss. Use only for very small previews or icons.
Format guide
JPG vs PNG vs WebP Compression
Choosing the right output format has a bigger impact on file size than the quality setting alone.
| Format | Compression | Transparency | Best for | File size |
|---|---|---|---|---|
| JPG | Lossy | No | Photos, social images | Very small |
| PNG | Lossless | Yes | Logos, screenshots, icons | Larger |
| WebPRecommended | Lossy / Lossless | Yes | Web images, modern browsers | Smallest |
FAQ
Frequently Asked Questions
Common questions about image compression and how this tool works.
Your images stay on your device
This compressor runs entirely inside your browser using the Canvas API and OffscreenCanvas. Images are processed locally — no data is transmitted to any server, no files are stored, and no account is required.
100%
Local processing
0
Server uploads
0
Files stored
Free
Always
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Need to convert formats as well?
The free image converter supports JPG, PNG, WebP, AVIF, GIF, BMP, TIFF and ICO — all in your browser with no uploads.